J.G.H. Du Preez, B.J.A.M. Van Brecht, R.F. Van de Water, M.R. Caira
{"title":"The coordination chemistry of divalent cobalt, nickel and copper—IX","authors":"J.G.H. Du Preez, B.J.A.M. Van Brecht, R.F. Van de Water, M.R. Caira","doi":"10.1016/0022-1902(81)80538-6","DOIUrl":"10.1016/0022-1902(81)80538-6","url":null,"abstract":"<div><p>The preparation, properties and X-ray crystal structure of [Cu(ttda)(tmen)](ClO<sub>4</sub>)<sub>2</sub>, a complex of divalent copper perchlorate with the ligands N,N,N′,N′-tetramethyl-1,2-diaminoethane (tmen) and bis-(N,N′-dimethyl-acetamido)thioether(ttda) are reported. The crystals are monoclinic with <em>a</em> = 15.35(1), <em>b</em> = 15.04(1), <em>c</em> = 10.91(1) A, β = 98.74(2)°, four formula units per unit cell and space group P2<sub>1</sub>/<em>n</em>. The complex cation is shown to be penta-coordinate with a distorted square pyramidal geometry. Comparison is made with the properties and structure of the previously reported CuCl<sub>2</sub>·ttda.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 9","pages":"Pages 2011-2016"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80538-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77759814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Photochemical decomposition of K2[Cu(C2O4)2]·2H2O in the solid-state","authors":"Keiichi Tanaka","doi":"10.1016/0022-1902(81)80662-8","DOIUrl":"10.1016/0022-1902(81)80662-8","url":null,"abstract":"","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 11","pages":"Pages 2999-3001"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80662-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80832447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J.B. Martins, E.S. De Almeida , V. Di Napoli , M. Foshina, O.A.P. Tavares, M.L. Terranova
{"title":"Photodisintegration of light and medium-weight nuclei at intermediate energies—V","authors":"J.B. Martins, E.S. De Almeida , V. Di Napoli , M. Foshina, O.A.P. Tavares, M.L. Terranova","doi":"10.1016/0022-1902(81)80002-4","DOIUrl":"10.1016/0022-1902(81)80002-4","url":null,"abstract":"<div><p>The mass-yield dependence of (<em>γ</em>,<em>n</em>) and (<em>γ</em>,<em>p</em>) reactions in the photon energy range (0.2–1) GeV has been investigated. A Monte Carlo calculation for these reactions has been carried out to compare values of the measured cross sections with those arising from different models of interaction. Very good agreement was found between experiment and estimates based on a fast-step, direct character for the reaction mechanism. As a result of the analysis, <em>N</em>- and <em>Z</em>-dependences of mean cross sections are given for the (<em>γ</em>,<em>n</em>) and (<em>γ</em>,<em>p</em>) reactions. Agreement with a more sophisticated theory is also quite reasonable.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 6","pages":"Pages 1115-1127"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80002-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76085218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"ESR and electronic spectra of some bis(N-substituted-2-picolinamine N-oxide)copper(II) tetraphenylborates","authors":"Douglas X. West, Kristy K. Bennett","doi":"10.1016/0022-1902(81)80540-4","DOIUrl":"10.1016/0022-1902(81)80540-4","url":null,"abstract":"<div><p>ESR and electronic spectral parameters of four tetraphenylborate salts of Cu(II) complexes are presented and compared to the analogous tetrafluoroborate and perchlorate salts.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 9","pages":"Pages 2021-2023"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80540-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77330771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Application of the oscillator strength of “hypersensitive” transitions to the investigation of complex equilibria of lanthanide ions—I","authors":"K. Bukietyńska, A. Mondry, E. Osmȩda","doi":"10.1016/0022-1902(81)80036-X","DOIUrl":"10.1016/0022-1902(81)80036-X","url":null,"abstract":"<div><p>A method of evaluation of stability constants for the lanthanide complexes from the changes of oscillator strengths of “hypersensitive” <em>f</em>-<em>f</em> transitions as a function of total ligand concentration is proposed. The method is discussed for neodymium acetate and glycolate and holmium lactate complexes. Stability constants calculated for mononuclear species are compared with the potentiometric data of Sonesson. This method is also useful for the calculation of thermodynamic parameters using measurements of the dependence of the oscillator strength on temperature.</p><p>The method is limited to lanthanide ions with <em>f</em><sup>2</sup>-<em>f</em><sup>6</sup> and <em>f</em><sup>8</sup>-<em>f</em><sup>12</sup> electronic configurations.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 6","pages":"Pages 1311-1319"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80036-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84845632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Solvent extraction of boron with 2-ethyl-1,3-hexanediol and 2-chloro-4-(1,1,3,3-tetramethylbutyl)-6-methylol-phenol","authors":"P. Ayers, A.W.L. Dudeney, F. Kahraman","doi":"10.1016/0022-1902(81)80556-8","DOIUrl":"10.1016/0022-1902(81)80556-8","url":null,"abstract":"<div><p>The solvent extraction equilibrium of boron extraction has been studied for petroleum ether solutions of 2-ethyl-1,3-hexanediol (EHD) and 2-chloro-4-(1,1,3,3-tetramethylbutyl)-6-methylol-phenol (CTMP), employed both singly and in admixture. Theoretical considerations are developed to account semi-quantitatively for observed trends in extraction with changes in pH and organic reagent concentration. The mixed reagents in a 1 : 1 concentration ratio give a much enhanced extraction in the pH range 8–12 and extraction becomes essentially pH independent when the EHD/CTMP ratio is 3 : 1. Boron extraction is largely unaffected by changes in the type of cation present (Na<sup>+</sup>, Ca<sup>2+</sup> or Mg<sup>2+</sup>). These observations are interpreted in terms of the opposing pH dependences of the two reagents and of the formation of different mixed complexes in the organic phase. The possible application of mixed-reagent solvent extraction is discussed in terms of boron pollution control.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 9","pages":"Pages 2097-2100"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80556-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74739038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cu(II) halopropionate complexes","authors":"Ewa John","doi":"10.1016/0022-1902(81)80608-2","DOIUrl":"10.1016/0022-1902(81)80608-2","url":null,"abstract":"<div><p>Cu(II) complexes were prepared with the following acids: propionic, α- and β-bromoproionic, α- and β-chloropropionic, α,β-dichloropropionic and β-iodopropionic. On the basis of elemental and thermogravimetric analyses the compositions of the complexes crystallized from water and recrystallized from methanol, acetone and dioxane was determined.</p><p>The effect of these solvents on the spectral properties of Cu(II) halopropionates in the UV and IR region was investigated, and it is shown that in solvents of low dielectric constants dimeric structures may occur. IR spectra of the Cu(II) complexes recrystallized form the above mentioned solvents and of their sodium salts were measured. The results obtained indicate that the structure of Cu(II) halopropionates is always dimeric in the solid state, analogous to that of Cu(II) acetate monohydrate. This conclusion is also confirmed by abnormal magnetic moments of these complexes. Temperature dependent magnetic susceptibilities indicative of antiferromagnetic nature were observed.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 11","pages":"Pages 2735-2742"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80608-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88779745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Solvent extraction of certain rare earth metal ions with 1-(2-pyridylazo)-2-naphthol (PAN)—I Extraction of dysprosium(III) and ytterbium(III) by PAN from aqueous solutions","authors":"B. Kuźnik","doi":"10.1016/0022-1902(81)80116-9","DOIUrl":"10.1016/0022-1902(81)80116-9","url":null,"abstract":"<div><p>The solvent extraction of certain heavy lanthanides (dysprosium and ytterbium) by 1-(2-pyridylazo)-2-naphthol (PAN or HL) in carbon tetrachloride has been studied as a function of contact time, the pH of the aqueous phase, the concentration of the extractant in the organic phase and the influence of solvents. The data suggest that the equation for the extraction reaction is <span><span><span><math><mtext>Ln</mtext><msup><mi></mi><mn>3+</mn></msup><msub><mi></mi><mn>(aq)</mn></msub><mtext>+3HL</mtext><msub><mi></mi><mn>(0)</mn></msub><mtext>⇌LnL</mtext><msub><mi></mi><mn>3(0)</mn></msub><mtext>+3H</mtext><msup><mi></mi><mn>+</mn></msup><msub><mi></mi><mn>(aq)</mn></msub><mtext>(where Ln</mtext><msup><mi></mi><mn>3+</mn></msup><mtext>=Dy, Yb).</mtext></math></span></span></span></p><p>From the distribution coefficient D, extraction equilibrium constants (K<sub>ex</sub> of reaction, two-phase stability constants (<em>β</em><sub>3</sub><sup><em>x</em></sup>) for the LnL<sub>3</sub> complexes, pH<sub>0.5</sub>, and separation factor (S<sub>Yb/Dy</sub>) have been evaluated.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 12","pages":"Pages 3363-3368"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)80116-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88953060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ahmad S. Shawali, Magdi M. Naoum, Nahed F. Abdelfattah
{"title":"Linear free energy relationships for Fe(III) complexes with aroylacetanilides","authors":"Ahmad S. Shawali, Magdi M. Naoum, Nahed F. Abdelfattah","doi":"10.1016/0022-1902(81)90016-6","DOIUrl":"https://doi.org/10.1016/0022-1902(81)90016-6","url":null,"abstract":"<div><p>Acid dissociation constants (p<em>K</em><sub><em>a</em></sub>) of seven substituted benzoylacetanilides <strong>1</strong><em>a-g</em> and the stability constants (log <em>B</em><sub><em>n</em></sub>) of their 1:1 and 1:2 Fe(III) chelates were determined spectrophotometrically in 60% by volume ethanol-water mixture at ionic strength of 0.1 and 25°C. The correlations between log <em>B</em><sub><em>n</em></sub> and p<em>K</em><sub><em>a</em></sub> and Hammett substituent constant (σ) were examined. The relations follow the equations: log <em>B</em><sub>1</sub> = 9.53−2.86 <em>σ</em>; log <em>B</em><sub>2</sub> = 16.27−7.07 <em>σ</em>; log <em>B</em><sub>1</sub> =1.26 p<em>K</em><sub><em>a</em></sub>-2.36; and log <em>B</em><sub>2</sub>=3.10 p<em>K</em><sub><em>a</em></sub>-13.09. The relations between the stability constants of Fe(III) chelates with the ligands <strong>1</strong><em>a</em>-<em>g</em> and benzoylacetarylamides <strong>2</strong><em>a</em>-<em>g</em> and those reported for Cu(II) chelates with <strong>2</strong><em>a</em>-<em>g</em> are also discussed. The results imply that Fe(III) chelates with the ligands <strong>1</strong><em>a</em>-<em>g</em> are subject to “normal” rather than “structural” substituent effects.</p></div>","PeriodicalId":16275,"journal":{"name":"Journal of Inorganic and Nuclear Chemistry","volume":"43 2","pages":"Pages 315-322"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-1902(81)90016-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90021895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}