Temperature-induced single-crystal-to-single-crystal transformation of a binuclear Mn(ii) complex into a 1D chain polymer

Abstract

Dehydration of complex [Mn₂(4-Apha)₄(H₂O)₂]·2H₂O (1, 4-AphaH = 4-aminophenylhydroxamic acid) upon heating at 393 K led to the removal of coordinated water molecules to give anhydrous [Mn(4-Apha)₂] (2). The crystal structure transformation has been characterized by variable temperature PXRD and TGA-DSC analysis. Single crystal X-ray diffraction analysis reveals that complex 1 exhibits a binuclear structure and complex 2 shows a 1D chain structure. Both of them show antiferromagnetic exchange interactions between the metal centers.