Coordination compounds of ethylhydrazine (cas 18413-14-4) and 2,2,2-Trifluoroethylhydrazine (cas 18413-14-4); crystal and molecular structure of dichlorotetrakis(2,2,2-Trifluoroethylhydrazine (cas 18413-14-4)) nickel(II)

Add time:09/03/2019    Source:sciencedirect.com

ethylhydrazine (cas 18413-14-4) (EH) forms the complexes MX2(EH)2 (M = Co, Ni; X = Cl; M = Co, X = Br), NiBr2(EH)2(H2O) and MX2(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 MX2(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 NiCl2(TFEH)4 confirms that the hydrazine bonds to nickel through the NH2 nitrogen only, in a tetragonal structure with axial chlorine atoms. One bis(TFEH) complex ZnBr2(TFEH)2 and one hexakis (TFEH) complex, NiBr2(TFEH)6, have also been isolated.

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