[CuCN.Me(3)SnCN.0.5bpy] (bpy = 4,4'-Bipyridine): A Novel Supramolecular Assembly Involving the No Longer Unusual {Cu(2)(&mgr;-CN)(2)(CN)(2)} Motif.
Reaction of K(3)[Cu(CN)(4)] with Me(3)SnCl and 4,4'-bipyridine (bpy) affords the novel ternary adduct [CuCN.Me(3)SnCN.0.5bpy], 2, as yellow, cubelike crystals. The supramolecular architecture of 2 consists, according to a single-crystal X-ray study, of remarkably porous, approximately planar sheets held together by almost perpendicular bpy pillars. Basic building blocks of the sheets are {Cu(2)(&mgr;-CN)(2)(CN)(2)} fragments whose N atoms are connected, via Me(3)Sn bridges, with the N atoms of adjacent fragments. 2 crystallizes in space group P2(1)/c with (at 20 degrees C) a = 10.035(4) Å, b = 11.980(3) Å, c = 12.425(5) Å, beta = 110.94(3) degrees, and Z = 4. The dinuclear building blocks resemble strongly those of the long known, but chemically more labile, layered coordination polymer [CuCN.NH(3)], 1. Although the lattice of 2 consists of two equivalent, ideally interpenetrating 3D frameworks, spacious, straight channels of a cross section of ca. 10 Å x 5 Å persist in this unprecedented structure. The likewise polymeric new adduct [CuCN.Me(3)SnCN.H(2)O] (3) obtained from K(3)[Cu(CN)(4)] and Me(3)SnCl in the absence of bpy may be considered as a formal precursor of 2.
Ibrahim
Amany M. A.
AM
Department of Chemistry, Faculty of Science, Ain Shams University, Abbassia, Cairo, Egypt, and Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, D-20146, Hamburg, Germany.
Siebel
Eric
E
Fischer
R. Dieter
RD