title: Synthesis, structure, and magnetic properties of bis(monosubstituted-pyrazine)dihalocopper(II).
abstract: The investigation into synthesizing new metal organic compounds with the general formula Cu(S-pyrazine)X(2) using monosubstituted pyrazines has led to the generation of a new family of compounds Cu(S-pyrazine)(2)X(2) with similar structure and magnetic properties. The bis(S-pyrazine)dihalocopper(II) compounds [where S = Cl, CN, OCH(3), and OCH(2)CH(3) and halide = Cl or Br] have been characterized by IR, powder X-ray diffraction, single-crystal X-ray diffraction, and temperature dependent magnetic susceptibility. The bis(chloropyrazine)dihalocopper(II) compounds crystallize in the monoclinic space group P2(1)/n while the methoxy and ethoxy analogues crystallize in the triclinic space group P1. This structurally related family of compounds exhibit antiferromagnetic interactions with exchange constants of approximately -25 K for the chloride analogues and -50 K for the bromide analogues.
authors.affiliation: Carlson School of Chemistry and Biochemistry and the Department of Physics, Clark University, 950 Main Street, Worcester, MA 01610, USA. MTURNBULL@CLARKU.EDU
authors.forename: Susan N
authors.initials: SN
authors.lastname: Herringer
authors.forename: Alyssa J
authors.initials: AJ
authors.lastname: Longendyke
authors.forename: Mark M
authors.initials: MM
authors.lastname: Turnbull
authors.forename: Christopher P
authors.initials: CP
authors.lastname: Landee
authors.forename: Jan L
authors.initials: JL
authors.lastname: Wikaira
authors.forename: Geoffrey B
authors.initials: GB
authors.lastname: Jameson
authors.forename: Shane G
authors.initials: SG
authors.lastname: Telfer