title: Crystal structures and magnetic properties of new cyano-bridged two-dimensional grid-like bimetallic assemblies [Ni(tn)2]2[Cr(CN)5((NO)]OH*H2O and [NI(tn)2]2[Co(CN)6]NO3*2H2O (tn=1,3-propanediamine).
abstract: Two bimetallic assemblies, [Ni(tn)(2)](2)[Cr(CN)(5)(NO)]OH.H(2)O (1) and [Ni(tn)(2)](2)[Co(CN)(6)]NO(3).2H(2)O (2) (tn = 1,3-diaminopropane), have been prepared and structurally and magnetically characterized. Crystal data for 1 (2): space group P1 (P1), a = 8.698(3) (8.937(2)) A, b = 10.001(2) (9.863(1)) A, c = 10.158(2) (10.064(1)) A, alpha = 87.40(2) (86.064(10)) degrees, beta = 65.10(2) (65.489(10)) degrees, gamma = 81.63(2) (81.572(12)) degrees and Z = 1 (1). Both structures consist of two-dimensional grid-like polycations containing Ni-N triple bond C-M linkages (M = Cr or Co) and counteranions (OH, NO(3)). Magnetic studies of 1 showed that the complex displays a metamagnetic behavior originating from intralayer ferromagnetic and interlayer antiferromagnetic interactions. Long-range antiferromagnetic ordering was observed at T(N) = 3.3 K. Complex 2 exhibits intramolecular ferromagnetic interactions through the diamagnetic N triple bond C-Co-N triple bond C bridges, owing to superexchange involving the empty d(sigma) orbital of the diamagnetic Co(III) ion.
authors.affiliation: Department of Chemistry, Nankai University, Tianjin 300071, P.R. China.
authors.forename: H Z
authors.initials: HZ
authors.lastname: Kou
authors.forename: J K
authors.initials: JK
authors.lastname: Tang
authors.forename: D Z
authors.initials: DZ
authors.lastname: Liao
authors.forename: S
authors.initials: S
authors.lastname: Gao
authors.forename: P
authors.initials: P
authors.lastname: Cheng
authors.forename: Z H
authors.initials: ZH
authors.lastname: Jiang
authors.forename: S P
authors.initials: SP
authors.lastname: Yan
authors.forename: G L
authors.initials: GL
authors.lastname: Wang
authors.forename: B
authors.initials: B
authors.lastname: Chansou
authors.forename: J P
authors.initials: JP
authors.lastname: Tuchagues