OrganometallicsPub Date : 2025-05-15DOI: 10.1021/acs.organomet.5c0009010.1021/acs.organomet.5c00090
J. Pablo Martínez*, Dariusz Lewandowski, Grzegorz Hreczycho* and Bartosz Trzaskowski*,
{"title":"Mechanistic Study of Silylacetylene Hydroboration Catalyzed by a Cobalt PN5P Pincer Complex: Catalytic Cycles Altering the Reaction Efficiency","authors":"J. Pablo Martínez*, Dariusz Lewandowski, Grzegorz Hreczycho* and Bartosz Trzaskowski*, ","doi":"10.1021/acs.organomet.5c0009010.1021/acs.organomet.5c00090","DOIUrl":"https://doi.org/10.1021/acs.organomet.5c00090https://doi.org/10.1021/acs.organomet.5c00090","url":null,"abstract":"<p >The reaction mechanisms of the hydroboration of silylacetylene with pinacolborane catalyzed by a cobalt complex with a PN5P triazine pincer have been studied using density functional-theory (DFT). The calculations reveal multiple reaction routes for catalyst initiation and product formation. The cobalt complex undergoes activation via hydride transfer from pinacolborane, a process confirmed by experimental NMR analysis. Additionally, DFT results indicate that catalyst activation involves dimerization and hydrogen evolution. In contrast to the generally proposed cobalt-boryl intermediates, the active catalyst is identified as a cobalt monohydride species. During the propagation phase, cobalt monohydride preferentially reacts with silylacetylenes rather than pinacolborane, as indicated by kinetic and thermodynamic descriptors, thus impeding the formation of cobalt boryl species. This higher reactivity of alkynes in this reaction is attributed to their Brønsted acidity. The pathways leading to the hydroborated product involve hydrometallation competing with hydrogen evolution, with the latter being followed by borylation with pinacolborane, hydroalkylation, and eventually either reductive elimination or alkyne insertion. Our findings also indicate that transition state energies can be reduced by incorporating electron-withdrawing groups into the silylacetylene substrate. Enhancements in product yield are examined in relation to the silyl substituents, as well as a protocol with broader applicability, formulated under laboratory conditions.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"44 10","pages":"1088–1099 1088–1099"},"PeriodicalIF":2.5,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.organomet.5c00090","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
OrganometallicsPub Date : 2025-05-15DOI: 10.1021/acs.organomet.5c0009310.1021/acs.organomet.5c00093
Yuzhuo Sha, Wenchao Chu*, Tongliang Zhou, Roger Lalancette, Roman Szostak and Michal Szostak*,
{"title":"Gold(I) Complexes of ImPyDippDipp and ImPyMesMes: Biaryl L-Shaped N-Heterocyclic Carbene Analogues of IPr and IMes","authors":"Yuzhuo Sha, Wenchao Chu*, Tongliang Zhou, Roger Lalancette, Roman Szostak and Michal Szostak*, ","doi":"10.1021/acs.organomet.5c0009310.1021/acs.organomet.5c00093","DOIUrl":"https://doi.org/10.1021/acs.organomet.5c00093https://doi.org/10.1021/acs.organomet.5c00093","url":null,"abstract":"<p >Imidazol-2-ylidenes, IPr and IMes, represent by far the most important and widely utilized N-heterocyclic carbenes in organic synthesis and catalysis. Herein, we report the synthesis, catalytic activity, and structural and electronic characterization of ImPyDippDipp and ImPyMesMes, sterically bulky and easily accessible biaryl L-shaped N-heterocyclic carbene analogues of IPr and IMes. These ligands exploit the rigid imidazo[1,5-<i>a</i>]pyridin-3-ylidene architecture to merge the properties of the biaryl scaffold with the electron-rich characteristics of the carbene center. The catalytic activity is evaluated in the gold(I)-catalyzed hydration of alkynes and cyclization N-propargylamides, two model reactions for π-activation of alkynes that have found broad application in organic synthesis. Structural and electronic evaluation indicates that biaryl L-shaped ImPyDippDipp and ImPyMesMes ligands are more sterically demanding and more electron σ-donating and π-accepting than the classical imidazol-2-ylidnes, IPr and IMes. Both of these L-shaped ligands show excellent catalytic activity in gold(I)-catalyzed hydration of alkynes and cyclization of N-propargylamides compared to their imidazol-2-ylidene congeners, IPr and IMes. Considering the tremendous impact of imidazol-2-ylidenes in homogeneous catalysis, we anticipate that this class of biaryl L-shaped NHCs will be rapidly and widely adopted to complement IPr and IMes N-heterocyclic carbenes.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"44 10","pages":"1100–1107 1100–1107"},"PeriodicalIF":2.5,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
OrganometallicsPub Date : 2025-05-15DOI: 10.1021/acs.organomet.5c0007010.1021/acs.organomet.5c00070
Errikos Kounalis, Marieke M. Broekman, Puck Uyttewaal, Uladzislava Dabranskaya, Martin Lutz and Daniël L. J. Broere*,
{"title":"Divergent Organomagnesium Reactivity of Rigid, Dinucleating Naphthyridine Ligands: Backbone Changes with Big Impact","authors":"Errikos Kounalis, Marieke M. Broekman, Puck Uyttewaal, Uladzislava Dabranskaya, Martin Lutz and Daniël L. J. Broere*, ","doi":"10.1021/acs.organomet.5c0007010.1021/acs.organomet.5c00070","DOIUrl":"https://doi.org/10.1021/acs.organomet.5c00070https://doi.org/10.1021/acs.organomet.5c00070","url":null,"abstract":"<p >We report the synthesis and characterization of two naphthyridine-based ligands bearing pendant secondary amine and amide donors, respectively. We additionally report their deprotonation chemistry and reactivity with dialkylmagnesium and Grignard reagents. The Grignard reactions yield structurally distinct <b>L</b>Mg<sub>2</sub>Cl<sub>2</sub>·(THF)<sub><i>n</i></sub> complexes, with the amide-based complex exhibiting reduced steric strain from the ligand around the Mg<sub>2</sub>Cl<sub>2</sub> core. Comparison of the steric profiles of the <b>L</b>Mg<sub>2</sub>Cl<sub>2</sub>·(THF)<sub><i>n</i></sub> complexes reveals that this reduced steric strain stems from the difference in binding modes of the ligands, which in the amide case points the bulk of sterically demanding substituents away from the Mg<sub>2</sub>Cl<sub>2</sub> core. Reactivity of the ligands with Mg(<i>n</i>-Bu)<sub>2</sub> shows divergent outcomes: the secondary amine-based ligand forms the <b>L</b>Mg<sub>2</sub>(<i>n</i>-Bu)<sub>2</sub>·(THF)<sub>2</sub> complex cleanly, whereas the amide-based ligand produces paramagnetic species via Mg–C homolysis, triggering radical reactivity that results in ligand butylation and dimerization. These findings underscore the unique steric and electronic features of dimagnesium complexes supported by rigid, dinucleating naphthyridine ligands, highlighting how variations in ligand architecture can profoundly influence coordination chemistry and reactivity.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"44 10","pages":"1057–1066 1057–1066"},"PeriodicalIF":2.5,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.organomet.5c00070","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
OrganometallicsPub Date : 2025-05-14DOI: 10.1021/acs.organomet.5c0007610.1021/acs.organomet.5c00076
Debipada Chatterjee, Sampad Shyamal and Sundargopal Ghosh*,
{"title":"Diborane and Bis(boryl) Complexes of Osmium Stabilized in the Coordination Sphere of [Cp*Os] (Cp* = η5-C5Me5)","authors":"Debipada Chatterjee, Sampad Shyamal and Sundargopal Ghosh*, ","doi":"10.1021/acs.organomet.5c0007610.1021/acs.organomet.5c00076","DOIUrl":"https://doi.org/10.1021/acs.organomet.5c00076https://doi.org/10.1021/acs.organomet.5c00076","url":null,"abstract":"<p >Electron-precise osmium boron complexes have been synthesized and structurally characterized with similarity to [B<sub>2</sub>H<sub>6</sub>]. Thermolysis of an unstable intermediate, generated from the reaction of [(Cp*OsBr<sub>2</sub>)<sub>2</sub>], <b>1</b>, and [LiBH<sub>4</sub>·THF], with CO gas led to the formation of colorless [Cp*Os(CO)<sub>2</sub>(η<sup>2</sup>-B<sub>2</sub>H<sub>5</sub>)], <b>2</b>. Complex <b>2</b> is analogous to diborane(6) [B<sub>2</sub>H<sub>6</sub>], in which one of the bridging hydrogens is replaced by a [Cp*Os(CO)<sub>2</sub>] fragment. With an objective to isolate Os-diborane species supported by aryl chalcogenide fragments, we have treated <b>1</b> with an in situ generated chalcogenoborate species [LiBH<sub>3</sub>(SePh)]. The reaction yielded [(Cp*Os)<sub>2</sub>(μ-(HB)O(BH)-κ<sup>2</sup>B:κ<sup>2</sup>B)(μ-SePh)<sub>2</sub>], <b>3</b>, in which an oxadiborirane unit is coordinated to two [Cp*Os] fragments. In contrast, the thermolysis of an osmium intermediate, generated from the reaction of [(Cp*OsBr<sub>2</sub>)<sub>2</sub>], <b>1</b>, and [LiBH<sub>4</sub>·THF], with [S<sub>2</sub>Ph<sub>2</sub>] yielded a bis(boryl) complex, [(Cp*Os)<sub>2</sub>(μ-HBS(1,2-C<sub>6</sub>H<sub>4</sub>)BS-κ<sup>2</sup>B:κ<sup>2</sup>B:κ<sup>2</sup>S)(μ-SPh)], <b>4</b>. All the complexes have been characterized by multinuclear NMR and IR spectroscopies, mass spectrometry, and single-crystal X-ray diffraction studies. Additionally, density functional theory (DFT) calculations are carried out that afford insight into the bonding of complexes <b>2</b>–<b>4</b>.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"44 10","pages":"1075–1087 1075–1087"},"PeriodicalIF":2.5,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
OrganometallicsPub Date : 2025-05-13DOI: 10.1021/acs.organomet.5c0014110.1021/acs.organomet.5c00141
Yuki Seita, Kouta Yujiri and Masahiro Kamitani*,
{"title":"Silicone Curing Using an Iron PNN Pincer Complex","authors":"Yuki Seita, Kouta Yujiri and Masahiro Kamitani*, ","doi":"10.1021/acs.organomet.5c0014110.1021/acs.organomet.5c00141","DOIUrl":"https://doi.org/10.1021/acs.organomet.5c00141https://doi.org/10.1021/acs.organomet.5c00141","url":null,"abstract":"<p >An iron complex catalyst, which exhibits a high solubility in silicone, was synthesized and evaluated for its catalytic activity in the curing of silicone fluids at temperatures ranging from 25 to 120 °C. Curing was performed under both argon and air atmospheres. Cured silicone was obtained even in the presence of heteroatom-containing compounds, such as nitrogen, phosphorus, and sulfur, which are typically known to poison platinum-based industrial catalysts. This catalyst could therefore aid in the development of materials that are otherwise challenging to prepare using traditional methods.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"44 10","pages":"1108–1112 1108–1112"},"PeriodicalIF":2.5,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
OrganometallicsPub Date : 2025-05-12DOI: 10.1021/acs.organomet.5c0001110.1021/acs.organomet.5c00011
Alberto Feliciano-Carmona, Xiqu Wang, Russell P. Hughes*, Olafs Daugulis* and Maurice Brookhart*,
{"title":"Mechanistic Studies of Ligand Substitution, Linkage Isomerism, and Insertion Reactions in Electron Rich Pd(II) Complexes of a Zwitterionic Diimine Ligand","authors":"Alberto Feliciano-Carmona, Xiqu Wang, Russell P. Hughes*, Olafs Daugulis* and Maurice Brookhart*, ","doi":"10.1021/acs.organomet.5c0001110.1021/acs.organomet.5c00011","DOIUrl":"https://doi.org/10.1021/acs.organomet.5c00011https://doi.org/10.1021/acs.organomet.5c00011","url":null,"abstract":"<p >We have prepared cationic palladium complexes possessing a new zwitterionic ligand bis-<i>N</i>,<i>N</i>’–1-(2,4,6-triphenylpyridyl) oxalamide [(N∧N)Pd(Me)(L)]<sup>+</sup>[BArF]<sup>−</sup>, (BArF = 3,5-(CF<sub>3</sub>)<sub>2</sub>C<sub>6</sub>H<sub>3</sub>, L = NCMe, CO). The structure of [(N∧N)Pd(Me)(CO)]<sup>+</sup>[BArF]<sup>−</sup> was determined by X-ray diffraction analysis. Energy Decomposition Analysis (EDA) indicates this N∧N zwitterionic ligand is more electron-donating relative to bidentate diimine ligands. Low temperature NMR analysis shows the existence of linkage isomers with the N∧N isomer the most stable. Structures were assigned using NMR and DFT analysis. Barriers to interconversion of isomers are Δ<i>G</i><sup>‡</sup> = 10–12 kcal/mol. Kinetics of acetonitrile displacement from [(N∧N)Pd(Me)(NCCH<sub>3</sub>)]<sup>+</sup>[BArF]<sup>−</sup> by CD<sub>3</sub>CN, ethylene and <sup>t</sup>Bu<sub>3</sub>P were measured and mechanisms of exchange determined. The ethylene complex, [(N∧N)Pd(Me)(C<sub>2</sub>H<sub>4</sub>)]<sup>+</sup> was generated at −45 °C, and the barrier of migratory insertion was determined at 0 °C (Δ<i>G</i><sup>‡</sup> = 23.4 kcal/mol) and compared to related diimine complexes. The methyl carbonyl complex undergoes migratory insertion in the presence of CO at −70 to −55 °C (Δ<i>G</i><sup>‡</sup> = ca. 15.7 kcal/mol) to yield the acyl carbonyl complex. The neutral bis-trimethylsilylmethyl complex, (N∧N)Pd(CH<sub>2</sub>SiMe<sub>3</sub>)<sub>2</sub> was prepared and characterized by X-ray diffraction analysis. It displays dynamic behavior at very low temperatures in the NMR spectrum (−90 °C, Δ<i>G</i><sup>‡</sup> = 7.9 kcal/mol) which, supported by DFT analysis, is ascribed to rotation of the bulky −CH<sub>2</sub>SiMe<sub>3</sub> groups.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"44 10","pages":"1022–1039 1022–1039"},"PeriodicalIF":2.5,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
OrganometallicsPub Date : 2025-05-09DOI: 10.1021/acs.organomet.5c0005310.1021/acs.organomet.5c00053
Wilbur L. Richter, Marlene Kolter, Timo Schillmöller, Katharina Hendrich, Anne-Kathrin Kreyenschmidt and Konrad Koszinowski*,
{"title":"Aggregation and Association of Lithium and Magnesium Organoaluminates in Tetrahydrofuran","authors":"Wilbur L. Richter, Marlene Kolter, Timo Schillmöller, Katharina Hendrich, Anne-Kathrin Kreyenschmidt and Konrad Koszinowski*, ","doi":"10.1021/acs.organomet.5c0005310.1021/acs.organomet.5c00053","DOIUrl":"https://doi.org/10.1021/acs.organomet.5c00053https://doi.org/10.1021/acs.organomet.5c00053","url":null,"abstract":"<p >Transmetalation of AlCl<sub>3</sub> with organolithium or Grignard reagents affords organoaluminates, which are of interest not only for synthetic applications but also for their use as novel electrolyte materials. Here, we employ a combination of electrospray-ionization mass spectrometry, electrical-conductivity measurements, and <sup>1</sup>H NMR spectroscopy to characterize the molecular constituents of lithium and magnesium aluminates formed by the treatment of AlCl<sub>3</sub> with <i>n</i> equiv of RLi or RMgCl, <i>n</i> = 1–4 and R = Me, <i><sup>i</sup></i>Pr, Bu, Hex, Cy, Ph, and 2-thienyl, in tetrahydrofuran. In all cases, we find the formation of aluminate ions of the type [R<i><sub>n</sub></i>AlCl<sub>4–<i>n</i></sub>]<sup>−</sup>. These aluminates undergo only sluggish intermolecular exchange reactions of their organyl groups, which we attribute to the stability of the tetrahedral aluminate moiety and the reluctance of the latter toward dissociative and associative processes. Nonetheless, two of the [R<i><sub>n</sub></i>AlCl<sub>4–<i>n</i></sub>]<sup>−</sup> complexes can bind a Li<sup>+</sup> counterion to furnish heteronuclear aggregates [LiR<sub>2<i>n</i></sub>Al<sub>2</sub>Cl<sub>8–2<i>n</i></sub>]<sup>−</sup>. Analogous aggregates containing magnesium do not form, which reflects the lack of readily available mononuclear [MgCl]<sup>+</sup> ions in tetrahydrofuran. Apart from intact organoaluminates, we also observe oxygen-containing species resulting from inadvertent oxidation and hydrolysis reactions with residual traces of oxygen and moisture.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"44 10","pages":"1040–1046 1040–1046"},"PeriodicalIF":2.5,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.organomet.5c00053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
OrganometallicsPub Date : 2025-05-06DOI: 10.1021/acs.organomet.5c0007110.1021/acs.organomet.5c00071
Tatyana V. Balashova*, Svetlana K. Polyakova, Vasily A. Ilichev, Ivan D. Grishin, Roman V. Rumyantcev, Georgy K. Fukin, Alexey V. Marugin and Mikhail N. Bochkarev*,
{"title":"Synthesis and Luminescent Properties of Lanthanide Complexes with Naphthylboronic Acid","authors":"Tatyana V. Balashova*, Svetlana K. Polyakova, Vasily A. Ilichev, Ivan D. Grishin, Roman V. Rumyantcev, Georgy K. Fukin, Alexey V. Marugin and Mikhail N. Bochkarev*, ","doi":"10.1021/acs.organomet.5c0007110.1021/acs.organomet.5c00071","DOIUrl":"https://doi.org/10.1021/acs.organomet.5c00071https://doi.org/10.1021/acs.organomet.5c00071","url":null,"abstract":"<p >Herein, heteroleptic complexes [Ln(NpBO<sub>2</sub>H)<sub>3</sub>(TPPO)<sub>2</sub>(DME)]<i><sub>n</sub></i> (Ln = La (<b>1</b>), Sm (<b>2</b>), Eu (<b>3</b>), Yb (<b>4</b>)), [CpLn(NpBO<sub>2</sub>)(DME)]<sub>n</sub> (Ln = La (<b>5</b>), Nd (<b>6</b>)) and [Cp<sub>2</sub>Ln(NpBO<sub>2</sub>H)(DME)]<sub>2</sub> (Ln = Sm (<b>7</b>), Er (<b>8</b>), Yb (<b>9</b>)) were synthesized using Ln[N(SiMe<sub>3</sub>)<sub>2</sub>]<sub>3</sub> or Ln(Cp)<sub>3</sub> as starting materials. The complexes <b>7</b>–<b>9</b> were structurally characterized. The lanthanum derivatives <b>1</b> and <b>5</b> exhibited phosphorescence at 77 K. Photoluminescence (PL) spectra of Sm (<b>2</b>, <b>7</b>) and Eu (<b>3</b>) complexes contain the bands of f-f transitions typical for the corresponding metal ion. The ytterbium derivatives <b>4</b> and <b>9</b> exhibited NIR metal-centered photoluminescence of the Yb<sup>3+</sup> ion.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"44 10","pages":"1067–1074 1067–1074"},"PeriodicalIF":2.5,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
OrganometallicsPub Date : 2025-05-05DOI: 10.1021/acs.organomet.5c0005810.1021/acs.organomet.5c00058
Taichi Koike, Atsuhiro Sato, Naoki Sakurata and Takeaki Iwamoto*,
{"title":"Cyclic (Alkyl)(amino)silylene Aluminum(III) Iodide Complex and Its Nucleophile Dependent Reactivities","authors":"Taichi Koike, Atsuhiro Sato, Naoki Sakurata and Takeaki Iwamoto*, ","doi":"10.1021/acs.organomet.5c0005810.1021/acs.organomet.5c00058","DOIUrl":"https://doi.org/10.1021/acs.organomet.5c00058https://doi.org/10.1021/acs.organomet.5c00058","url":null,"abstract":"<p >Exploration of bonding motifs and reactivity modes of molecules that contain an Al–Si core is of particular interest in terms of broadening the application of two of the most abundant elements in the Earth’s crust. Here we report on the synthesis of cyclic (alkyl)(amino)silylene <b>CAASi</b>-ligated aluminum(III) triiodide (AlI<sub>3</sub>) complex <b>1</b> and investigate its reactivity differences depending on the nucleophile of choice. While the reaction of complex <b>1</b> with the anionic nucleophile, Ph<sub>2</sub>NLi, selectively results in substitution on Al(III) to afford the <b>CAASi</b>-AlI<sub>2</sub>NPh<sub>2</sub> complex (<b>2</b>), treatment of the neutral nucleophiles, N-heterocyclic carbenes (NHCs), results in irreversible ligand exchanges to give the corresponding NHC-AlI<sub>3</sub> complexes. Compound <b>1</b>, in the presence of 1.0 equiv of <b>CAASi</b>, forms an unusual AlISi<sub>2</sub>-heterocyclic compound <b>6</b> in the solid state, which was characterized by single crystal XRD analysis. DFT calculations and trapping experiments in solution revealed that <b>6</b> exists as a 1:1 equilibrium mixture of <b>1</b> and <b>CAASi</b> in solution.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"44 10","pages":"1013–1017 1013–1017"},"PeriodicalIF":2.5,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
OrganometallicsPub Date : 2025-05-04DOI: 10.1021/acs.organomet.5c0011210.1021/acs.organomet.5c00112
Kristof M. Altus, M. Arif Sajjad, Stuart A. Macgregor* and Andrew S. Weller*,
{"title":"[B(O2C2(CF3)4)2]− ([FPB]−): Repurposing This Weakly Coordinating Anion for Solid-State Molecular Organometallic (SMOM) Chemistry","authors":"Kristof M. Altus, M. Arif Sajjad, Stuart A. Macgregor* and Andrew S. Weller*, ","doi":"10.1021/acs.organomet.5c0011210.1021/acs.organomet.5c00112","DOIUrl":"https://doi.org/10.1021/acs.organomet.5c00112https://doi.org/10.1021/acs.organomet.5c00112","url":null,"abstract":"<p >The perfluoropinacol borate-based anion [B(O<sub>2</sub>C<sub>2</sub>(CF<sub>3</sub>)<sub>4</sub>)<sub>2</sub>]<sup>−</sup>, <b>[FPB]</b><sup>–</sup>, is developed as a weakly coordinating anion for single-crystal to single-crystal organometallic solid/gas reactivity, resulting in the isolation and characterization (including periodic DFT and IGMH analysis) of the σ-alkane complex [Rh(Cy<sub>2</sub>PCH<sub>2</sub>CH<sub>2</sub>PCy<sub>2</sub>)(<i>exo</i>-η<sup>2</sup>η<sup>2</sup>-norbornane)][FPB]. The synthetically useful solvent-free Na<sup>+</sup> salt, Na[FPB], and oxonium acid [H(OEt<sub>2</sub>)<sub>2</sub>][FPB] are also reported.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"44 10","pages":"1018–1021 1018–1021"},"PeriodicalIF":2.5,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.organomet.5c00112","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}