A synthetic strategy for switching the single ion anisotropy in tetrahedral Co(II) complexes

Shefali Vaidya; Apoorva Upadhyay; Saurabh Kumar Singh; Tulika Gupta; Subrata Tewary; Stuart K. Langley; James P. S. Walsh; Keith S. Murray; Gopalan Rajaraman; Maheswaran Shanmugam

doi:10.1039/C4CC08305A

A synthetic strategy for switching the single ion anisotropy in tetrahedral Co(ii) complexes†

Shefali Vaidya,^a Apoorva Upadhyay,^a Saurabh Kumar Singh,^a Tulika Gupta,^a Subrata Tewary,^a Stuart K. Langley,^b James P. S. Walsh,^c Keith S. Murray,^b Gopalan Rajaraman*^a and Maheswaran Shanmugam*^a

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^a Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, India
E-mail: rajaraman@chem.iitb.ac.in, eswar@chem.iitb.ac.in

^b School of Chemistry, Monash University, Clayton, Victoria-3800, Australia

^c School of Chemistry, The University of Manchester, Oxford Road, Manchester, UK

Abstract

Four novel mononuclear tetrahedral cobalt(II) complexes containing exocyclic mesoionic ligands of molecular formulae [Co^II(L₁)(X)₂(MeCN)] X = Cl (1) or Br (2) and [Co^II(L₂)(X)₂(MeCN)], X = Cl (3) or Br (4) have been reported. It is found that simple substitution of L₁ (O donor in 1 and 2) by L₂ (S donor in 3 and 4) results in switching of the single ion magnetic anisotropy parameter (D) from positive to negative, with a significant change in magnitude.

Chemical Communications

A synthetic strategy for switching the single ion anisotropy in tetrahedral Co(ii) complexes†

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A synthetic strategy for switching the single ion anisotropy in tetrahedral Co(II) complexes

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