title: Molecular structures of carbonyl-linked bis(dioxolene) complexes: can a carbonyl group act as an effective ferromagnetic coupler?
abstract: Molecular structures of two bis(ZnIIdioxolene) complexes are described: (TpCum,MeZn)(2)1-H2 (C106H123.50B2N12O10Zn2), tetragonal, P4/ncc, a = 25.1810(2) A, b = 25.1810(2) A, c = 34.7744(2) A, alpha = 90 degrees, beta = 90 degrees, gamma = 90 degrees, Z = 8; (TpCum,MeZn)(2)1-H (C101H120B2N12O6Zn2), triclinic, P1, a = 13.6624(2) A, b = 13.80920(10) A, c = 26.62340(10) A, alpha = 96.6910(10) degrees, beta = 91.8560(10) degrees, gamma = 109.0190(10) degrees, Z = 2. One of the complexes, (TpCum,MeZn)(2)1-H2, has two protonated catecholate ligands, while the other complex, (TpCum,MeZn)(2)1-H, has one protonated catecholate and one semiquinone ligand. When reacted with PbO2, a labile S = 1, bis(ZnIIsemiquinone) complex is formed in which the two semiquinones are attached to a common carbonyl group.
authors.affiliation: Departments of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, USA. shultz@chemdept.chem.ncsu.edu
authors.forename: D A
authors.initials: DA
authors.lastname: Shultz
authors.forename: S H
authors.initials: SH
authors.lastname: Bodnar
authors.forename: R K
authors.initials: RK
authors.lastname: Kumar
authors.forename: H
authors.initials: H
authors.lastname: Lee
authors.forename: J W
authors.initials: JW
authors.lastname: Kampf