Abstract
A nickel(II) chelate, NiL1Cl2, has been obtained by reaction of nickel(II) chloride with a 15-membered N,O-donor macrocyclic ligand. Single-crystal X-ray studies reveal an octahedral environment around nickel(II). 7,7′,8,8′-Tetracyanoquinodimethane (tcnq) derivatives of the nickel(II) chelate were prepared by reaction with Litcnq and Et3N(tcnq)2. Spectroscopic measurements show the presence of only anionic tcnq in [NiL1(tcnq)2]·4H2O and a mixture of non-coordinating anionic and neutral tcnq species in [NiL1](tcnq)4·H2O.
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