Syntheses at Elevated Temperature and Structures of Lanthanoid/Alkaline Earth Heterobimetallic Derivatives of 2‐Methyl‐8‐hydroxyquinoline
作者:Glen B. Deacon、Craig M. Forsyth、Peter C. Junk、Aron Urbatsch
DOI:10.1002/ejic.201000325
日期:2010.6
Ln(MQ)3 and AE(MQ)2 (MQ = 8-quinaldinolate) at 200–300 °C in a 1,2,4,5-tetramethylbenzene (TMB) flux afforded the homoleptic heterobimetallic complexes [Ln2AE(MQ)8] (Ln = Eu, Gd, Tb, Er with AE = Mg; Ln = La, Eu with AE = Ca) and [Eu3Ba(MQ)11]·2TMB. From an attempt to prepare [La2Mg(MQ)8], [Mg4(MQ)8] was isolated, and it was also obtained with the heterobimetallics from syntheses in which Ln = Eu,
Ln(MQ)3 和 AE(MQ)2(MQ = 8-喹哪二醇)在 1,2,4,5-四甲基苯 (TMB) 通量中于 200-300 °C 发生重排反应得到均配型异双金属配合物 [Ln2AE( MQ)8](Ln = Eu、Gd、Tb、Er,AE = Mg;Ln = La,Eu,AE = Ca)和 [Eu3Ba(MQ)11]·2TMB。从制备 [La2Mg(MQ)8] 的尝试中,分离出 [Mg4(MQ)8],并且还通过合成中的异双金属化合物获得,其中 Ln = Eu、Gd、Tb。令人惊讶的是,[Er3(MQ)7CO3] 是从 [Er2Ca(MQ)8] 的尝试合成中分离出来的,并且 Eu 类似物是在 210°C 下在 TMB 中由 Eu(MQ)3 和 CaCO3 制备的。[Ln2AE(MQ)8]配合物具有线性或近线性Ln-AE-Ln阵列的三核结构。八配位 Ln 原子有一个末端螯合 (N, O) MQ