Hydrothermal synthesis and crystal structures of Cd(II)-based 1D coordination polymer and Mn(II) coordination complex with mixed N- and O-donor ligands: [Cd (4-4′-bpy) (pa) ] ·0.25(H O) and [Mn(4-4′-bpy) (pa)(H O) ]ClO ·2(H O)

Two new complexes, [Cd (4-4′-bpy) (pa) ] ·0.25H O (1) (pa = phenylacetate), and [Mn(4-4′-bpy) (pa)(H O) ]ClO ·2H O, (2), have been obtained from hydrothermal reaction of Cd(NO ) ·4H O and Mn(ClO ) ·6H O with a mixture of the ligands, 2-phenylmalonic acid (2-phmalH ) and 4-4′-bipyridine (4-4′-bpy). The pa is formed in situ by decarboxylation of phenylmalonic acid. These complexes have been characterized by elemental analysis, FT-IR spectroscopy, thermogravimetric analysis and single-crystal X-Ray diffraction. The Cd(II) center is seven-coordinate and linked via pa ligands to form a binuclear complex in the asymmetric unit of 1. A ladder-like 1D chain of binuclear units is formed by Cd(II)-N coordination bond through 4-4′-bpy ligands. Complex 2 consists of a mononuclear manganese center based on a distorted octahedral geometry and exhibits a supramolecular structure containing hydrogen bonds and extensive π···π and C-H···π interactions. © Springer Science+Business Media, LLC 2009.