Three cyano bridged hetero-metallic complexes of general formula, [Cu(NH3)(2)(mu-ampy)M(mu-CN)(2)(CN)(2)](n) [ampy = 4-aminomethylpyridine, M = Ni(II) (1), Pd(II) (2) and Pt(II) (3)] have been synthesized and characterized by vibrational (FT-IR and Raman) spectroscopy, single crystal X-ray diffraction, thermal analyses and elemental analyses. The complexes crystallize in triclinic system with space group P-1. In all complexes, M(II) ions are coordinated by four cyano ligands, and four N atoms in the equatorial plane around the Cu atom form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the cyanide N atoms in the axial positions. In one-dimensional structures of all the complexes, [Cu(ampy)](2+) cations and [M(CN)(4)](2-) anions are linked via bridging cyano ligands. The adjacent one-dimensional structures form a 2D network to connect by the mu-ampy bridging ligands. The 2D layers are further linked by metal...pi and hydrogen bonding interactions to generate a three dimensional network. (C) 2013 Elsevier B.V. All rights reserved.