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。