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Coordination compounds of ethylhydrazine and 2,2,2-Trifluoroethylhydrazine; crystal and molecular structure of dichlorotetrakis(2,2,2-Trifluoroethylhydrazine) nickel(II) by Azilah Abd. Rahman; M.P. Brown; Marjorie M. Harding; C.Elizabeth Keggan; D. Nicholls is a Chemistry article available to read on EtoBox.

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Ethylhydrazine (EH) forms the complexes MX2(EH)2 (M = Co, Ni ; X = Cl; M = Co, X = Br), NiBr2(EH)2(H20) and MX,(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 NiC12(TFEH)4 conhrms 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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Author

Azilah Abd. Rahman; M.P. Brown; Marjorie M. Harding; C.Elizabeth Keggan; D. Nicholls

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0277-5387)

Published

1988

Language

EN

Field

Chemistry (Physical Sciences)