作者:Nosheen F. Choudhary、Neil G. Connelly、Peter B. Hitchcock、G. Jeffery Leigh
DOI:10.1039/a908337e
日期:——
A new range of potentially tetradentate proligands, H2L, derived from aromatic aldehydes and ketones and aliphatic diamines has been prepared. Their vanadyl(IV) and vanadyl(V) complexes [VO(L)] and [VO(L)]+, and also some adducts [VO(L)âVO(L)]+, have been synthesized. The structures of four selected complexes have been determined and it is shown that these must be a result of both steric and electronic factors that make prediction of conformation and stacking difficult. The adducts [VO(L)âVO(L)]+ have structures that persist in solution in dichloromethane, where they can undergo redox chemistry, but they apparently dissociate into their component complexes in the donor solvent acetonitrile.
一系列潜在的四齿配体H2L已由芳香醛、酮以及脂肪族二胺制备而成。它们的钒(IV)和钒(V)配合物[VO(L)]和[VO(L)]+,以及一些加合物[VO(L)âVO(L)]+也已合成。对四个选定配合物的结构进行了确定,结果显示这些结构必须是由于立体和电子因素的共同作用,使得对构象和堆叠的预测变得困难。加合物[VO(L)âVO(L)]+在二氯甲烷溶液中具有持久的结构,在该环境中它们可以进行氧化还原反应,但在供体溶剂乙腈中,它们显然会解离成各自的组成配合物。