The nickel, copper and zinc complexes of potentially heptadentate nitrogen–sulfur donor ligands

Steel, G. and Mustapha, A. and Reglinski, J. and Kennedy, A.R. (2014) The nickel, copper and zinc complexes of potentially heptadentate nitrogen–sulfur donor ligands. Polyhedron, 67. pp. 360-367. ISSN 0277-5387

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Abstract

The multidentate compound, tris-(o-butylthiobenzyl)- aminoethylamine (L), which contains four nitrogen and three sulfur donors has been synthesised by combining 2-amino-methyl-1,3-diamino-propane (tren) with o-butylthiobenzaldehyde. L has been reacted with the nitrate salts of nickel, copper and zinc to give a series of L M(NO) complexes which were crystallographically characterised. In all cases the metal binds to the N motif proffered by the tren moiety. The nickel complex achieves a hexacoordinate geometry by ligating with a didentate (-O,O′) nitrate. Copper and zinc both produced five coordinate species by ligating with a unidentate nitrate. None of the species reported include the thio-ethers in the coordination sphere of the metal. Replacing nitrate with nitrite in the copper system allows the synthesis of a five coordinate unidentate, oxygen bound, nitrite complex. A number of unsuccessful attempts have been made, using Cd, Pb and Au, to assemble the three thioethers groups into a secondary coordination motif for metals. These reactions produce a series of LM-halide complexes which have again been crystallographically characterised.