title: A synthetic strategy for switching the single ion anisotropy in tetrahedral Co(II) complexes.
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.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India. rajaraman@chem.iitb.ac.in eswar@chem.iitb.ac.in.
authors.forename: Shefali
authors.initials: S
authors.lastname: Vaidya
authors.forename: Apoorva
authors.initials: A
authors.lastname: Upadhyay
authors.forename: Saurabh Kumar
authors.initials: SK
authors.lastname: Singh
authors.forename: Tulika
authors.initials: T
authors.lastname: Gupta
authors.forename: Subrata
authors.initials: S
authors.lastname: Tewary
authors.forename: Stuart K
authors.initials: SK
authors.lastname: Langley
authors.forename: James P S
authors.initials: JP
authors.lastname: Walsh
authors.forename: Keith S
authors.initials: KS
authors.lastname: Murray
authors.forename: Gopalan
authors.initials: G
authors.lastname: Rajaraman
authors.forename: Maheswaran
authors.initials: M
authors.lastname: Shanmugam