Azilah Binti Abd Rahman, M. P. Brown, M. Harding
1988
Citations
0
Influential Citations
6
Citations
Journal
Polyhedron
Abstract
Abstract Ethylhydrazine (EH) forms the complexes MX 2 (EH) 2 (M = Co, Ni; X = Cl; M = Co, X = Br), NiBr 2 (EH) 2 (H 2 O) and MX 2 (EH) (M = Zn, Cd; X = Cl; M = Zn, X = Br). Spectroscopic evidence suggests that these all contain bridging hydrazine ligands, the cobalt and nickel complexes containing six coordinated metal atoms while the zinc and cadmium complexes are tetrahedral. 2,2,2-Trifluoroethylhydrazine (TFEH) in contrast, forms six coordinate complexes of the type MX 2 (TFEH) 4 (M = Co, Zn, X = Br; M = Co, Ni, X = NCS; M = Ni, X = Cl) for which spectroscopic evidence points to unidentate coordination by the hydrazine. An X-ray crystal structure determination on NiCl 2 (TFEH) 4 confirms that the hydrazine bonds to nickel through the NH 2 nitrogen only, in a tetragonal structure with axial chlorine atoms. One bis(TFEH) complex ZnBr 2 (TFEH) 2 and one hexakis (TFEH) complex, NiBr 2 (TFEH) 6 , have also been isolated.