One- and Two-Dimensional Heteropolynuclear Complexes with Tetracyanonickelate(II) and 2-Pyridinemethanol

Abstract

Three new cyano complexes, [Cu(hmp)<inf>2</inf>] [Cu(hmpH)<inf>2</inf>Ni(μ-CN)<inf>2</inf>(CN)<inf>2</inf>]<inf>2</inf>·4H<inf>2</inf>O (1), [Zn<inf>3</inf>(hmp)<inf>2</inf>(hmpH)<inf>4</inf>-Ni<inf>2</inf>(μ-CN)<inf>6</inf>(CN)<inf>2</inf>]·2H<inf>2</inf>O (2) and [Cd<inf>2</inf>(H<inf>2</inf>O)<inf>2</inf>(hmpH)<inf>2</inf>Ni(μ-CN)<inf>4</inf>Ni(μ-CN)<inf>2</inf>(CN)<inf>2</inf>] (3) (2-pyridinemethanol abbreviated to hmpH), have been synthesized and characterized by elemental analysis, vibrational spectroscopy (FT-IR and Raman), thermal and single-crystal X-ray diffraction analyses. In 1, Cu(II) ions are connected by the tetracyanonickelate(II) anions to form one-dimensional (1D) zig-zag chains. In 2, tetracyanonickelate(II) ions are coordinated to the neighboring three Zn(II) ions to form a one-dimensional double chain structure. In 3, Cd(II) ions are connected by tetrakis-monodentate tetracyanonickelate(II) ions to form a one-dimensional ladder-like chain. Adjacent ladder-like chains are linked by the bis-monodentate tetracyanonickelate(II) ions to generate a 2D network. The 3D supramolecular network of the complexes constructed by intermolecular interactions such as Ni···π, C-H···Ni, π···π and hydrogen bonding interactions.