that compounds NTU-2, NTU-3 and NTU-4 possess two-dimensional layer structures, while compound NTU-1 adopts a one-dimensional coordination framework (NTU-n, where n is the number related to a specific structure). The diffuse-reflectance spectra demonstrate that these four compounds possess indirect bandgaps and their tunable bandgaps are correlated with their compositions and crystal structures.
Synthesis and structural characterization of tris(2-seleno-1-mesitylimidazolyl) hydroborato complexes: A new type of strongly electron donating tripodal selenium ligand
作者:Mao Minoura、Victoria K. Landry、Jonathan G. Melnick、Keliang Pang、Luciano Marchi?、Gerard Parkin
DOI:10.1039/b608078b
日期:——
A new tripodal ligand that features three selenium donors, namely the tris(2-seleno-1-mesitylimidazolyl)hydroborato ligand, [TseMes], has been constructed via the reaction of KBH4 with 1-mesitylimidazole-2-selone; comparison of the IR spectroscopic data of [TseMes]Re(CO)3 with those of a variety of related LRe(CO)3 complexes demonstrates that the [TseMes] ligand is more strongly electron donating than Cp, Cp*, [Tp], [TpMe2] and [TmMes] ligands.
Bis(pyrazolyl)(thioimidazolyl)borate Ligands: The Missing Member in the N<sub>3</sub>···S<sub>3</sub> Scorpionate Series
作者:Boumahdi Benkmil、Mian Ji、Heinrich Vahrenkamp
DOI:10.1021/ic048633s
日期:2004.12.1
The anionic bis(pyrazolyl)(thioimidazolyl)borate ligands BpMt(R) with R = tert-butyl and isopropyl were obtained as their potassium salts by reacting potassium tris(pyrazolyl)borate with the corresponding thioimidazoles in the melt at 150 degrees C. They were applied to form some tetrahedral zinccomplexes and identified by the crystal structures of (BpMt(t-Bu))ZnCl and (BpMt(i-Pr))Zn-SC(6)H(4)-p-Cl
Herein, with air-stable chalcogenated stibines (Sb–ER) as organometallic chalcogenating reagents, we developed base-promoted (Z)-hydrochalcogenation of alkynes with DMSO/DMSO-d6 as hydrogen/deuterium sources, giving chalcogenated (Z)-olefins in good yields and with excellent regioselectivity. These reagents, easily synthesized from halostibines with in situ generated [Zn(ER)2] at room temperature within
在此,我们以空气稳定的硫属代锑 ( Sb –ER) 作为有机金属硫属化合物试剂,开发了以 DMSO/DMSO- d 6作为氢/氘源的碱促进 ( Z )-炔烃的氢化反应,得到硫属代 ( Z )-烯烃产率高,区域选择性好。这些试剂很容易在室温下几分钟内由卤代锡与原位生成的 [Zn(ER) 2 ] 合成,也可用于碱促进的 C( sp 3 )-S(Se) 与 C 的交叉偶联( sp 3 )–X 和铜催化的 C( sp 2 )–S(Se) 与 C(sp 2 )–X (X = F, CI, Br, I) 在温和条件下。该协议也可以简单地扩展到具有良好功能耐受性的有机铋复合物 ( Bi -ER)。