One-Dimensional Heterobimetallic Complex Bridged by 2,2′-Bibenzimidazolate Ligand

Abstract

We have studied the crystal structure of a Cu(II) complex [Cu(bbim)2](ⁿPr₄N)(Na)•MeOH (1) [where bbim^2- = di-deprotonated 2,2′-bibenzimidazolate and ⁿPr₄N⁺ = tetra-n-propylammonium cation] with two bbim^2- as a di-deprotonated ligand for the first time. The X-ray crystal analysis shows that this Cu(II) complex consists of one-dimensional infinite chains with an alternate bonding sequence of Cu(II) and Na(I) bridged by the bbim^2- ligand. Interestingly, Cu(II) ion in this complex has a distorted tetrahedral coordination structure. The interaction between these infinite chains is separated by ⁿPr₄N⁺ cations.