The structure and magnetism of mono- and di-nuclear Ni(II) complexes derived from {N3O}-donor Schiff base ligands

abstract

By Schiff condensation, a new tetradentate {N3O}-donor ligand has been prepared in free form. It was combined with Ni(II) salts to yield mononuclear and dinuclear Ni(II) complexes whose structures were determined by single crystal X-ray structure analyses. The magnetic properties reveal some zero-field splitting for two mononuclear complexes and exchange coupling of ferromagnetic nature mediated by (mu(1,1)-N-3), (mu(1,1)-NCO) and (mu(1,1)-NCS) bridging coligands. Most importantly, the (mu(1,1)-NCO) and (mu(1,1)-NCS) bridging complexes are not only rare dinickel(II) complexes, but also the (mu(1,1)-NCS) bridging analogue is the first example of a ferromagnetically coupled dinickel(II) system.

keywords

SINGLE-MOLECULE MAGNETS; END-ON AZIDO; DI-MU-CYANATO; NICKEL(II) COMPLEXES; CRYSTAL-STRUCTURE; EXCHANGE INTERACTIONS; COPPER(II) COMPLEXES; BLOCKING LIGANDS; NI-II; MAGNETOSTRUCTURAL CORRELATIONS

subject category

Chemistry

authors

Panja, A; Jana, NC; Adak, S; Brandao, P; Dlhan, L; Titis, J; Boca, R

our authors

acknowledgements

A. P. gratefully acknowledges the financial support of this work by the CSIR, New Delhi, India (Sanction no. 01(2834)/15/EMR-II dated 02/06/15). Slovak grant agencies (APVV-14-0078 and VEGA 1/0534/16) are also acknowledged for the financial support.

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