title: Self-assembly of the unique heterotrimetallic Cu/Co/M complexes possessing triangular antiferromagnetic {Cu2CoPb}2 and linear ferromagnetic {Cu2CoCd2} cores.
abstract: Two novel heterotrimetallic octa-[Cu2CoPbCl4(L)4]2 (1) and pentanuclear [Cu2CoCd2Cl6(L)4(HOMe)2] (2) complexes have been prepared in one-pot reactions of zerovalent copper with metal chlorides in a methanol (for 1) or acetonitrile (for 2) solution of 2-(dimethylamino)ethanol (HL) in open air. The crystal structures of both compounds consist of discrete centrosymmetric heterotrimetallic molecules revealing triangular (1) and unique consecutive (2) arrangements of magnetic CuII(2)CoII cores. The complex 1 can be viewed as a dimer made up of tetranuclear Cu2CoPbCl4(L)4 units linked through the two micro(2)-Cl atoms. The molecular structure of 2 is a pentanuclear assembly containing the previously unknown Cu(micro-O)(2)Co(micro-O)(2)Cu core. The magnetic studies of 1 revealed an antiferromagnetic coupling (J(CoCu) = 37 cm(-1) and J(CuCu) = 87 cm(-1)) while 2 exhibits a weak ferromagnetic behavior (J(CoCu) = -3.2 cm(-1) and J(CuCu) = -14.2 cm(-1)). The correlations between magnetic behaviour and structures as well as synthetic features are also discussed.
authors.affiliation: Department of Inorganic Chemistry, National Taras Shevchenko University, Volodymyrska str. 64, Kyiv 01033, Ukraine.
authors.forename: Dmytro S
authors.initials: DS
authors.lastname: Nesterov
authors.forename: Volodymyr N
authors.initials: VN
authors.lastname: Kokozay
authors.forename: Brian W
authors.initials: BW
authors.lastname: Skelton
authors.forename: Julia
authors.initials: J
authors.lastname: Jezierska
authors.forename: Andrew
authors.initials: A
authors.lastname: Ozarowski
mesh_terms: D002104:Cadmium / Q000737:chemistry; D003035:Cobalt / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D019281:Dimerization; D007854:Lead / Q000737:chemistry; D008280:Magnetics; D015394:Molecular Structure
chemical_list: D002104:Cadmium; D007854:Lead; D003035:Cobalt; D003300:Copper