Heteroatom Chemistry最新文献_第6页

Comparison of homofugality among alkyl groups attached to tin atom 锡原子上烷基的同聚性比较

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-12-17 DOI: 10.1002/hc.21469

Akio Kamimura, Tatsuro Yoshinaga, Koichiro Miyazaki, Takuji Kawamoto

引用次数: 1

Synthesis of novel fluorous pyridinium ionic liquids 新型含氟吡啶离子液体的合成

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-12-17 DOI: 10.1002/hc.21464

Mitsunori Honda, Kohei Ashizawa, Ko-Ki Kunimoto, Masahito Segi

引用次数: 1

Behavior of I4 σ(4c–6e) in tellurolane system and related species, elucidated by QTAIM dual functional analysis with QC calculations 通过QTAIM双功能分析和QC计算阐明I4σ（4c-6e）在tellurolane系统和相关物种中的行为

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-12-17 DOI: 10.1002/hc.21462

Satoko Hayashi, Taro Nishide, Waro Nakanishi

{"title":"Behavior of I4 σ(4c–6e) in tellurolane system and related species, elucidated by QTAIM dual functional analysis with QC calculations","authors":"Satoko Hayashi, Taro Nishide, Waro Nakanishi","doi":"10.1002/hc.21462","DOIUrl":"10.1002/hc.21462","url":null,"abstract":"The nature of the AI-*-AI and AI-*-BI interactions in BI-*-AI-*-AI-*-BI of I4 σ(4c–6e) in the tellurolane system, C4H8(I)Te–I···I–I···I–Te(I)C4H8 (1), and the models is elucidated with QTAIM dual functional analysis (QTAIM-DFA). Asterisks (*) are employed to emphasize the existence of bond critical points (BCPs) on the interactions in question. Data from the fully optimized structures correspond to the static nature. Data from the perturbed structures around the fully optimized ones with the fully optimized structures represent the dynamic nature of interactions in QTAIM-DFA. The AI-*-AI and AI-*-BI interactions in the optimized structure of 1 (Ci)calcd are predicted to have the Cov-w (weak covalent) nature appeared in the shared shell region and the t-HBwc (typical hydrogen bonds with covalency) nature appeared in the regular closed shell (r-CS) region, respectively. However, both AI-*-AI and AI-*-BI interactions in the observed structure in crystals (1 (Ci)obsd) appear in the r-CS region. The isolated structure of only one molecule in vacuum for 1 (Ci)calcd vs that surrounded by the same molecules for 1 (Ci)obsd arises the different results. The nature of AI-*-AI and AI-*-BI in BI-*-AI-*-AI-*-BI of I4 σ(4c–6e) for the models is similarly analyzed.","PeriodicalId":12816,"journal":{"name":"Heteroatom Chemistry","volume":"29 5-6","pages":""},"PeriodicalIF":0.3,"publicationDate":"2018-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/hc.21462","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47331116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Regio- and stereoselective addition of trans-Pt(TeAr)(SiMe3)(PEt3)2 to terminal alkynes leading to cis-[(Z)-β-trimethylsilylalkenyl]platinum(II) complexes 反式Pt(TeAr)(SiMe 3)(PE t3) 2在末端炔上的区域选择性和立体选择性加成，生成顺式[(Z)‐β‐三甲基硅烯基]铂(II)配合物

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-12-15 DOI: 10.1002/hc.21463

Li-Biao Han, Farzad Mirzaei, Shigeru Shimada

引用次数: 0

A new method to prepare functional phosphines through steady-state photolysis of triarylphosphines† 三芳基膦稳态光解制备功能膦的新方法

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-12-13 DOI: 10.1002/hc.21468

Shinro Yasui, Taro Ando, Masashi Ozaki, Yuya Ogawa, Kosei Shioji

{"title":"A new method to prepare functional phosphines through steady-state photolysis of triarylphosphines†","authors":"Shinro Yasui, Taro Ando, Masashi Ozaki, Yuya Ogawa, Kosei Shioji","doi":"10.1002/hc.21468","DOIUrl":"10.1002/hc.21468","url":null,"abstract":"The steady-state photolysis of triarylphosphine, Ar3P, was carried out using a xenon lamp or a high-pressure mercury lamp under an argon atmosphere in a solvent containing a functional group, CH3X. Gas chromatograph-mass spectroscopic analysis on the photolysis showed that a phosphine to which the functional group from the solvent is incorporated, Ar2PCH2X, was formed in a moderate yield, along with tetraaryldiphosphine, Ar2PPAr2. The product, Ar2PCH2CN, from the photolysis in acetonitrile (X=CN) was isolated by column chromatography. In the photolysis in other solvents tried here (ethyl acetate, acetone, 2-butanone, and 3,3-dimethyl-2-butanone), Ar2PCH2X formed in the reaction mixture was so labile on a silica-gel column that it was treated with S8 powder to convert to the corresponding phosphine sulfide, Ar2P(=S)CH2X. The resulting phosphine sulfide was isolated by column chromatography. The isolated products in these reactions, Ar2PCH2CN and Ar2P(=S)CH2X, were characterized by 1H, 13C, and 31P NMR spectroscopy, IR spectroscopy, and elemental analysis or high-resolution mass spectroscopy. The formation of Ar2PCH2X as well as Ar2PPAr2 is explained by homolytic cleavage of a P-C bond of Ar3P in the photoexcited state. This reactivity of Ar3P in the photoexcited state is in sharp contrast to that exerted under aerobic conditions, where Ar3P in the photoexcited state donates readily an electron to oxygen producing the radical cation, Ar3P·+. This photoreaction, which affords a functional phosphine, Ar2PCH2X, in one-pot with generating very small amounts of unidentified side products, has potential for use in preparing functional phosphines.","PeriodicalId":12816,"journal":{"name":"Heteroatom Chemistry","volume":"29 5-6","pages":""},"PeriodicalIF":0.3,"publicationDate":"2018-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/hc.21468","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46397028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Physical modification of carbon nanotubes with a dendrimer bearing terminal mercaptoundecahydrododecaborates (Na2B12H11S) 含巯基的树枝状聚合物（Na2B12H11S）对碳纳米管的物理改性

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-12-13 DOI: 10.1002/hc.21467

Masahiro Yamagami, Tomoyuki Tajima, Kango Ishimoto, Hideaki Miyake, Hiroyuki Michiue, Yutaka Takaguchi

引用次数: 5

From catechol-tocopherol to catechol-hydroquinone polyphenolic antioxidant hybrids 从邻苯二酚-生育酚到邻苯二酚-对苯二酚-多酚抗氧化剂的杂化物

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-12-10 DOI: 10.1002/hc.21466

Caterina Viglianisi, Stefano Menichetti, Paola Morelli, Andrea Baschieri, Riccardo Amorati

引用次数: 5

Dehydrogenative Sn–E (E = S, Se) bond formation catalyzed by an iron complex 铁配合物催化脱氢Sn-E（E=S，Se）键的形成

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-12-04 DOI: 10.1002/hc.21461

Masumi Itazaki, Yudai Ogawa, Wataru Nakamura, Hiroshi Nakazawa

引用次数: 0

Self-assembly of sulfur-containing heterocyclic compounds constructed by thianthrene units and their sulfonium salts 由噻吩单元及其磺酸盐构成的含硫杂环化合物的自组装

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-29 DOI: 10.1002/hc.21459

Kazunori Hirabayashi, Kenki Ebine, Youhei Kawabata, Yoshihiro Yoshida, Toshio Shimizu

引用次数: 1

An overall experimental analysis: Effects of synthetic parameters on the degree of order of mesochannels in nano-sized Al-MCM-41 综合实验分析:合成参数对纳米Al-MCM-41介孔有序度的影响

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-29 DOI: 10.1002/hc.21457

Hossein Roohollahi, Rouein Halladj, Hadis Ebrahimi, Sima Askari

{"title":"An overall experimental analysis: Effects of synthetic parameters on the degree of order of mesochannels in nano-sized Al-MCM-41","authors":"Hossein Roohollahi, Rouein Halladj, Hadis Ebrahimi, Sima Askari","doi":"10.1002/hc.21457","DOIUrl":"10.1002/hc.21457","url":null,"abstract":"In an experimental and statistical study, the effects of five synthesis parameters on the degree of order of nano-sized Al-MCM-41 were basically investigated. In a series of designed experiments, hydrothermal conditions (temperature and time), Si/Al, NaOH/Si, and cetyltrimethylammonium bromide/Si molar ratios were studied each at three levels. Degree of order of mesoporous channels was evaluated using small angle XRD. Nitrogen adsorption-desorption technique, scanning and transmission electron microscopy (SEM-TEM), and field-emission SEM were also applied to detect the textural properties and the morphology of prepared nanoparticles. Energy-dispersive X-ray spectroscopy and mapping (EDS-Map), inductively coupled plasma-optical emission spectroscopy, and small angle X-ray scattering were provided as complementary analyses. An accurate reduced quadratic equation was proposed as a function of effective terms in good agreement with the experimental results. Based on the analysis of variance, the amount of aluminum incorporated, sodium hydroxide, and the hydrothermal treatment duration was found to possess more dramatic effects on the degree of order than the other factors. The optimum conditions for the synthesis of a well-ordered Al-MCM-41 were also obtained with the lowest template and the minimum hydrothermal duration verified by two validation tests.","PeriodicalId":12816,"journal":{"name":"Heteroatom Chemistry","volume":"29 4","pages":""},"PeriodicalIF":0.3,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/hc.21457","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43619673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1