分子金属膦酸盐中的新结构形式：含有膦酸盐和吡唑配体的新型三核和六核锌（II）笼状化合物。

New structural forms in molecular metal phosphonates: novel tri- and hexanuclear zinc(II) cages containing phosphonate and pyrazole ligands.

作者信息

Chandrasekhar Vadapalli, Kingsley Savariraj, Rhatigan Brian, Lam Matthew K, Rheingold Arnold L

机构信息

Department of Chemistry, Indian Institute of Technology, Kanpur, India 208016.

出版信息

Inorg Chem. 2002 Mar 11;41(5):1030-2. doi: 10.1021/ic011154y.

DOI:10.1021/ic011154y

PMID:11874331

Abstract

The reaction of ZnCl(2) with tert-butylphosphonic acid and 3,5-dimethylpyrazole in the presence of triethylamine as a hydrogen chloride scavenger affords a trinuclear molecular zinc phosphonate [Zn(3)Cl(2)(3,5-Me(2)Pz)(4)(t-BuPO(3))(2)]. The structure of this compound contains a planar trizinc assembly containing two bicapping mu(3) t-BuPO(3) ligands and terminal pyrazole and chloride ligands. In contrast an analogous reaction of ZnCl(2) with phenylphosphonic acid and 3,5-dimethylpyrazole affords a hexanuclear zinc phosphonate [Zn(6)Cl(4)(3,5-Me(2)PzH)(8)(PhPO(3))(4)]. The six zinc centers are arranged in a chairlike conformation. The four phosphonates in this complex also act as bridging tripodal mu(3) RPO(3) ligands.

摘要

在三乙胺作为氯化氢清除剂存在的情况下，氯化锌与叔丁基膦酸和3,5 - 二甲基吡唑反应，得到一种三核分子锌膦酸盐[Zn₃Cl₂(3,5 - Me₂Pz)₄(t - BuPO₃)₂]。该化合物的结构包含一个平面三锌组装体，其中含有两个双帽μ₃[t - BuPO₃]²⁻配体以及末端吡唑和氯配体。相比之下，氯化锌与苯基膦酸和3,5 - 二甲基吡唑的类似反应得到一种六核锌膦酸盐[Zn₆Cl₄(3,5 - Me₂PzH)₈(PhPO₃)₄]。六个锌中心以椅状构象排列。该配合物中的四个膦酸盐也作为桥连三脚架状μ₃[RPO₃]²⁻配体。