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Cobalt(II), nickel(II), copper(II) and zinc(II) complexes with an open-chain pentadentate nitrogen ligand

Dei, A.

Inorganica Chimica Acta, 1975, Vol.12 (1), p.79-83 [Peer Reviewed Journal]

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Title:
Cobalt(II), nickel(II), copper(II) and zinc(II) complexes with an open-chain pentadentate nitrogen ligand
Author: Dei, A.
Is Part Of: Inorganica Chimica Acta, 1975, Vol.12 (1), p.79-83
Description: The open-chain, potentially, pentadentate, ligan 1,11-bis(dimethylamino)-3,6,9-trimethyl-3,6,9,-triazaundecane (Me 7tetren) forms a series of metal complexes having the general formula [M(Me 7tetren)]Y 2 (Y = 1, M = Co, Ni; Y = ClO 4, M = Co, Ni, Cu, Zn). On the basis of their physical properties, it is suggested that all these compounds contains isostructural five-coordinate [M(Me 7tetren)] 2+ cations, the ligand acting as pentadentate. These complexes react in solution with thiocyanate ion to give mono- and, with exception of copper(II), di-thiocyanato five- and six-co-ordinate derivatives. Mono-thiocyanato derivatives of cobalt(II), nickel(II) and zinc(II) have been isolated as tetraphenylborate salts. Cobalt(II) and nickel (II) di-thiocyanato derivatives have been also isolated. Results are discussed in terms of the steric requirements of the ligand and electronic properties of the metal ions.
Publisher: Elsevier B.V
Language: English

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