Cation-controlled formation of [{MCl4}n]2n– chains in [4,4′-H2bipy][MCl4] (M = Mn, Cd): an alternative to the A2MCl4 <100> layer perovskite structure†

Abstract

The cis-MCl₂‥HN⁺ chelated hydrogen bond synthon has been exploited in preparation of crystalline [4,4′- H₂bipy][MCl₄] (M = Mn 2 and Cd 3), which shows a one-dimensional substructure of the form [{MCl₄}_n]^2n– consisting of a kinked chain of doubly edge sharing MCl₆ octahedra. These chains are cross-linked by hydrogen bonding to the [4,4′-H₂bipy]²⁺ ions.