Ligand-controlled nuclearity in nickel bis(benzimidazolyl) complexes

Way Zen Lee, Huan Sheng Tseng, Ting Shen Kuo

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A series of nickel complexes supported with a tripodal ligand bis(1-methylbenzimidazolyl-2-methyl)amine (L) or bis(1-methylbenzimidazolyl-2- methyl)-10-camphorsulfonamide (L′) on a Ni(ii) ion were synthesized and fully characterized. The complexes, [LNiCl(-Cl)]2·4CH 3OH (1), [LNi(CH3CN)3](ClO4) 2·2CH3CN (3), and [L2Ni 2(-OAc)3]X (X = Cl- (5) or ClO4 - (7)), coordinated with the tridentate L ligand, all possess an octahedral structure at the nickel center; in contrast, the geometry of the complexes, L′NiCl2 (2), [L′Ni(CH3CN) 3](ClO4)2·2CH3CN (4), and L′Ni(OAc)2·0.5Et2O (6), employing the L′ ligand are either tetrahedral or octahedral. Due to the weak coordinating ability of the sulfonamide group and the steric hindrance of the camphorsulfonyl group of L′, the tripodal L′ becomes a bidentate ligand in the presence of chloride or acetate groups, which have a stronger electron donating ability than acetonitrile, bound to the nickel center. It is noteworthy that the nuclearity of the nickel complexes can be controlled by the coordination ability of the central nitrogen of the supporting bis-methylbenzimidazolyl ligand.

Original languageEnglish
Pages (from-to)2563-2570
Number of pages8
JournalDalton Transactions
Issue number24
DOIs
Publication statusPublished - 2007 Jun 18

ASJC Scopus subject areas

  • Inorganic Chemistry

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