Hypervalent 5–Bi–12 derivatives containing dichalcogenoimidodiphosphinato ligands. Crystal structure and solution behaviour of [2-(Me<sub>2</sub>NCH<sub>2</sub>)C<sub>6</sub>H<sub>4</sub>]BiCl[(XPR<sub>2</sub>)(YPR′<sub>2</sub>)N] (X, Y = O, S, Se; R, R′ = Me, Ph)
作者:Lucia Balazs、Olimpiu Stanga、Hans J. Breunig、Cristian Silvestru
DOI:10.1039/b301290e
日期:——
The reaction between [2-(Me2NCH2)C6H4]BiCl2 and M[(XPR2)(YPRâ²2)N] in 1 â¶ 1 molar ratio affords the new functionalised [2-(Me2NCH2)C6H4]BiCl[(XPR2)(YPRâ²2)N] derivatives [R = Me, Râ²
= Ph, X = O, Y = S (1); R = Râ²
= Ph, X = Y = S (2), Se (3)]. Variable-temperature NMR studies suggest a fluxional behaviour in solution. The investigation of the molecular structures of 1â3 by single-crystal X-ray diffraction revealed that the N atoms of the pendant CH2NMe2 arm are strongly coordinated to the Bi atom and the organophosphorus ligands act as a bidentate moiety through both chalcogens, thus resulting in a square pyramidal coordination geometry around the metal atoms. The analysis of the crystal packing of 2 and 3 reveals the presence of pairs of enantiomers (the metal center is chiral) associated through weak intermolecular Biâ¯Cl interactions. The crystal of 1 contains only the trans-OâBiâCl isomer as a 1 â¶ 1 mixture of the two enantiomers, in a unique square pyramidal (C,N)BiCl(O,S) coordination geometry with five different atoms attached to the metal atom.
[2-(Me2NCH2)C6H4]BiCl2与M[(XPR2)(YPR′2)N]以1:1的摩尔比反应,生成新的功能化衍生物[2-(Me2NCH2)C6H4]BiCl[(XPR2)(YPR′2)N] [R = Me, R′ = Ph, X = O, Y = S (1); R = R′ = Ph, X = Y = S (2), Se (3)]。可变温度核磁共振研究表明,这些化合物在溶液中表现出可流动性。通过单晶X射线衍射对1–3的分子结构进行研究揭示,悬挂的CH2NMe2臂的N原子与Bi原子强烈配位,而有机磷配体则通过两种卤素作为双齿配体,从而导致金属原子周围形成方锥坐标几何构型。对2和3的晶体堆积分析显示存在一对一对的对映体(金属中心具有手性),这些对映体通过弱的分子间Bi-Cl相互作用相互关联。1的晶体仅包含转式O-Bi-Cl异构体,作为两个对映体的1:1混合物,形成独特的方锥(C,N)BiCl(O,S)配位几何结构,且有五种不同的原子连接在金属原子上。
Understanding the Origin of Phosphorescence in Bismoles: A Synthetic and Computational Study
作者:Sarah M. Parke、Mary A. B. Narreto、Emanuel Hupf、Robert McDonald、Michael J. Ferguson、Frank A. Hegmann、Eric Rivard
DOI:10.1021/acs.inorgchem.8b00149
日期:2018.7.2
A series of bismuth heterocycles, termed bismoles, were synthesized via the efficient metallacycle transfer (Bi/Zr exchange) involving readily accessible zirconacycles. The luminescenceproperties of three structurally distinct bismoles were explored in detail via time-integrated and time-resolved photoluminescence spectroscopy using ultrafast laser excitation. Moreover, time-dependent density functional
Organoantimony(III) and -bismuth(III) hypervalent pseudohalides. An experimental and theoretical study
作者:Ana Toma、Ciprian I. Raţ、Anca Silvestru、Tobias Rüffer、Heinrich Lang、Michael Mehring
DOI:10.1016/j.jorganchem.2013.06.044
日期:2013.11
The reaction between the organopnicogen(III) chlorides R2MCl and RMCl2 [M = Sb, Bi; R = 2-(Me2NCH2)C6H4] and alkali metal pseudohalides in a 1:1 and a 1:2 molar ratio, respectively, resulted in the formation of hypervalent species of type R2MX (M = Sb, X = NCO (1), NCS (2) and SeCN (3), M = Bi, X = NCO (4) and SeCN (5), and RMX2 (M = Sb, X = NCO (6) and NCS (7), M = Bi, X = NCO (8), NCS (9) and SeCN