Abstract
The zinc(II) and cadmium(II) complexes [Zn(4, 4′-bipy)(SCN)2]∞ 1 and [Cd(4, 4′-bipy)-(SCN)2]n 2 have been synthesized and their crystal structures determined by X-ray crystallography. Complex 1 is monoclinic, space group C2/c, with a = 18.076(5), b = 5.190(1), c = 17.315(4)Å; β = 115.54(2), V = 1465.8(8)Å3, calculated density 1.530gcm−3, Z = 4. In this compound, the rod-like ligand 4, 4′-bipy bridges Zn(II) centres, and the NCS groups are terminally coordinated. (N-Zn-N) is 108.5°, resulting in the formation of a zigzag Zn-bipy-Zn chain. These chains are arranged in parallel fashion. The 4, 4′-bipy ligands of adjacent layers are separated by 3.95 (Å). Complex 2 is monoclinic, space group C2/c, a = 11.902(2), b = 11.745(2), c = 10.500(2)Å; β = 109.71(3), V = 1381.8(4)Å3 calculated density 1.849gcm−3, Z = 4. In this structure, the cadmium(II) ion is slightly distorted octahedral and the SCN groups act as doubly bridging ligands connecting cadmium atoms to form zigzag chains, separated by 4, 4′-bipy to create two-dimensional planes.
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