Pandey Madhusudan K, Kunchur Harish S, Mondal Dipanjan, Radhakrishna Latchupatula, Kote Basvaraj S, Balakrishna Maravanji S
Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
Inorg Chem. 2020 Mar 16;59(6):3642-3658. doi: 10.1021/acs.inorgchem.9b03207. Epub 2020 Feb 24.
Gold(I) complexes of sterically demanding phosphines derived from 2,6-dibenzhydryl-4-methylphenyl core : 2,6-dibenzhydryl-,-bis((diphenylphosphane)-methyl)-4-methylaniline (), (2,6-dibenzhydryl-4-methylphenyl)-diphenylphosphane (), -(2,6-dibenzhydryl-4-methylphenyl)-1,1-diphenylphosphanamine (), and (2,6-dibenzhydryl-4-methylphenoxy)-diphenylphosphane () are described. The reaction of with 2 equiv of [AuCl(SMe)] in dichloromethane yielded [{AuCl}{ArN(CHPPh)}] (), which on further treatment with 2 equiv of AgSbF and 1 equiv of produced 12-membered dimeric complex [Au{μ-(ArN(CHPPh))}][(SbF)] (). A similar reaction of with AgSbF in CHCN afforded [{Au(NCCH)}{ArN(CHPPh)}][(SbF)] (). Equimolar reactions of bulky phosphines , , and with [AuCl(SMe)] resulted in [AuCl(PPhAr)] (), [AuCl(PPhNHAr*)] (), and [AuCl(PPhOAr*)] (). Complexes and on treatment with AgSbF in CHCN produced the cationic complexes [Au(NCCH)(PPhNHAr*)][(SbF)] () and [Au(NCCH)(PPhOAr*)][(SbF)] (), respectively. The molecular structure of complex revealed the presence of a strong intramolecular aurophilic interaction with a Au···Au distance of 2.9720(4) Å. Careful analysis of molecular structure of revealed the presence of rare Au···H-C () interactions between the gold(I) atom and one of the methylene protons of -NCHPPh groups. The solution H NMR signals of the methylene protons of showed a considerable downfield shift (∼1 ppm) compared to that of the free ligand indicating their interactions (Au···H) with the Au atom. Complexes and also showed Au···H interactions in their molecular structures. The existence of the Au···H interaction was studied by variable temperature H NMR data in the case of complex and further evinced by the QTAIM analysis in complexes , , and .
源自2,6 - 二二苯甲基 - 4 - 甲基苯基核心的空间位阻膦的金(I)配合物:2,6 - 二二苯甲基 - , - 双((二苯基膦基) - 甲基) - 4 - 甲基苯胺(),(2,6 - 二二苯甲基 - 4 - 甲基苯基) - 二苯基膦(), - (2,6 - 二二苯甲基 - 4 - 甲基苯基) - 1,1 - 二苯基膦胺()和(2,6 - 二二苯甲基 - 4 - 甲基苯氧基) - 二苯基膦()已被描述。在二氯甲烷中, 与2当量的[AuCl(SMe)]反应生成[{AuCl}{ArN(CHPPh)}](),用2当量的AgSbF和1当量的 进一步处理后得到12元二聚体配合物[Au{μ - (ArN(CHPPh))}][(SbF)]()。 在CHCN中与AgSbF的类似反应得到[{Au(NCCH)}{ArN(CHPPh)}][(SbF)]()。 大位阻膦 、 和 与[AuCl(SMe)]的等摩尔反应生成[AuCl(PPhAr)]()、[AuCl(PPhNHAr*)]()和[AuCl(PPhOAr*)]()。 配合物 和 在CHCN中用AgSbF处理分别生成阳离子配合物[Au(NCCH)(PPhNHAr*)][(SbF)]()和[Au(NCCH)(PPhOAr*)][(SbF)]()。 配合物 的分子结构显示存在强分子内亲金相互作用,Au···Au距离为2.9720(4) Å。 对 分子结构的仔细分析显示,在金(I)原子与 - NCHPPh基团的一个亚甲基质子之间存在罕见的Au···H - C()相互作用。 与游离配体相比, 的亚甲基质子的溶液H NMR信号显示出相当大的向低场位移(约1 ppm),表明它们与Au原子存在相互作用(Au···H)。 配合物 和 在其分子结构中也显示出Au···H相互作用。 在配合物 的情况下,通过变温H NMR数据研究了Au···H相互作用的存在,并在配合物 、 和 中通过QTAIM分析进一步证实。