One-pot reaction between the dinuclear [Mn-2(II)(bpym)(H2O)(8)](4+) complex and the mononuclear [M-IV(CN)(8)](4-) unit (M=Mo and W; bpym=2,2'-bipyrimidine) in aqueous solution yields the novel heterobimetallic complexes of formula {(mu-bpym) [Mn(H2O)](2)-(mu-NC)(6)M(CN)(2)} with M=Mo (1) and W (2). 1 and 2 are isostructural three-dimensional compounds where the manganese atoms are bridged by bisbidentate bpym and hexakismonodentate octacyanometalate units. Variable-temperature magnetic susceptibility data of 1 and 2 show the occurrence of a significant antiferromagnetic coupling between the high spin manganese(II) ions through bridging bpym (J ca. -1.1 cm(-1), the exchange Hamiltonian being defined as H = -JS(A).S-B)
[MnII2(bpym)(H2O)8]4+ and [MIV(CN)8]4- (M = Mo and W) as building blocks in designing bpym- and cyanide-bridged bimetallic three-dimensional networks (bpym = 2,2'-bipyrimidine)
ARMENTANO, Donatella;DE MUNNO, Giovanni;
2003-01-01
Abstract
One-pot reaction between the dinuclear [Mn-2(II)(bpym)(H2O)(8)](4+) complex and the mononuclear [M-IV(CN)(8)](4-) unit (M=Mo and W; bpym=2,2'-bipyrimidine) in aqueous solution yields the novel heterobimetallic complexes of formula {(mu-bpym) [Mn(H2O)](2)-(mu-NC)(6)M(CN)(2)} with M=Mo (1) and W (2). 1 and 2 are isostructural three-dimensional compounds where the manganese atoms are bridged by bisbidentate bpym and hexakismonodentate octacyanometalate units. Variable-temperature magnetic susceptibility data of 1 and 2 show the occurrence of a significant antiferromagnetic coupling between the high spin manganese(II) ions through bridging bpym (J ca. -1.1 cm(-1), the exchange Hamiltonian being defined as H = -JS(A).S-B)I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.