The synthesis and crystal structures of new trinuclear and hexanuclear nickel complexes with metallodithiolate ligands. (13th October 2017)

• Record Type: Journal Article
• Authors: Li, Hui; Yao, Chen-Zhong; Chai, Xiao-Chuan; Wang, Gao-Feng; Li, Jun; Wang, Jie; Wei, Zhuang-Wei; Zhou, Fu-Lin; Liu, Xu-Feng
• Is Part Of: Molecular crystals and liquid crystals. Volume 656(2017)
• Page Start: 131
• Page End: 138
• Publication Date: 2017-10-13
• Subjects: Acetyl coenzyme A synthase -- active site -- crystal structure -- metallodithiolate -- nickel; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2017.1389600
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: Two nickel complexes with metallodithiolate ligands, which can be regarded as the active site models of the acetyl coenzyme A synthase, were prepared and structurally characterized by X-ray crystallography. Reactions of Ni(PPh3 )2 Cl2 with Ni(bme-dach) [bme-dach = N, N '-bis(mercaptoethyl)-1, 4-diazacycloheptane] or Ni(bme-dach * ) [bme-dach * = N, N '-bis(mercaptoethyl)-1, 4-diazacyclohexane] in MeCN in the presence of NH4 PF6 resulted in the formation of a trinuclear nickel complex {Ni[Ni(bme-dach)]2 }[PF6- ]2 (1 ) and a hexanuclear nickel complex {Ni2 [Ni(bme-dach * )]4 }[PF6 − ]4 (2 ). The crystal structure of1 ·2MeCN shows a square planar geometry of nickel atom that is coordinated by four sulfur atoms of the metallodithiolate ligands Ni(bme-dach). The crystal structure of2 ·4MeCN reveals that each of the two nickel atoms is ligated by four sulfur atoms of the metallodithiolate ligands Ni(bme-dach * ) to form a square planar coordination sphere.