Complexes of Bidentate Phosphane Selenide Ligands with Mesitylenetellurenyl Iodide and with Tellurium Diiodide
作者:Cristian G. Hrib、Peter G. Jones、Wolf‐W. du Mont、Vito Lippolis、Francesco A. Devillanova
DOI:10.1002/ejic.200500843
日期:2006.3
8, or by the reaction of 1 with Te and I2, a chelate complex dppmSe2TeI2 (10) was formed. Fortuitously, a crystal of the related compound dppeSe2TeI2 (11) was also obtained. In 10, a square planar cis-Se2TeI2 group is part of a six-membered ring, and 11 is a coordination polymer with trans-Se2TeI2 moieties bridged by dppe. Averaged 31P- and 77Se NMR signals including 77Se–31P couplings, together with
双(二苯基膦基)甲烷二硒化物(dppmSe2, 1)和双(二苯基膦基)乙烷二硒化物(dppeSe2, 2)与 2 当量反应。Br2 或 I2 形成不溶性固体产物,dppm(SeX2)2 (X = Br, 3; X = I, 4) 和 dppe(SeX2)2 (X = Br, 5; X = I, 6)。然而,使用类似碘的亲电子试剂均三甲苯基碘化物 (MesTeI, 7),获得了相当可溶的复合物 dppmSe2[Te(I)Mes]2 (8) 和 dppeSe2[Te(I)Mes]2 (9)。配合物 8 和 9 包含两个由 dppm 或 dppe 桥接的 T 形 (10-Te-3) Se-Te(Mes)-I 部分;固体 9 表现出近似线性 Se-Te-I 单元之间的分子间软-软相互作用。在伴随配合物 8 结晶的副反应中,或通过 1 与 Te 和 I2 的反应,形成螯合配合物 dppmSe2TeI2