Issue 15, 2003

Making connections with molecular wires: extending tri-nickel chains with axial cyanide, dicyanamide, and phenylacetylide ligands

Abstract

New chemistry needed to facilitate the replacement of axial ligands (X) in Ni3(dpa)4X2 complexes (dpa = the anion of dipyridylamine) has been explored and used to replace X = Cl by X = CN, NCNCN, and C[triple bond, length as m-dash]CPh. The resulting compounds, 3, 4, and 5, respectively, have been characterized by X-ray crystallography and cyclic voltammetry, inter alia. It is found that both the mean Ni⋯Ni separations (D), and the magnitude of the antiferromagnetic coupling (J) between the terminal, high spin (S = 1) Ni(II) atoms vary in a correlated way, with |J| decreasing with increasing D. The relationship is nearly linear over the available ranges of parameters, suggesting that the coupling may proceed mainly through the central, diamagnetic Ni(II) ion.

Graphical abstract: Making connections with molecular wires: extending tri-nickel chains with axial cyanide, dicyanamide, and phenylacetylide ligands

Supplementary files

Article information

Article type
Paper
Submitted
12 May 2003
Accepted
18 Jun 2003
First published
03 Jul 2003

Dalton Trans., 2003, 3015-3021

Making connections with molecular wires: extending tri-nickel chains with axial cyanide, dicyanamide, and phenylacetylide ligands

J. F. Berry, F. Albert Cotton and C. A. Murillo, Dalton Trans., 2003, 3015 DOI: 10.1039/B305258C

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