A New Coordinated Transition-metal Linked Network Compound Constructed by Octamolybdate Chain

摘要

A novel transition-metal ion coordination-linked network compound {Na4[Co- (H2O)2(NH2NH2)2Mo8O27]·16H2O}n 1 was synthesized by the reduction reaction of Na2MoO4( 2H2O, NH2NH2(2HCl and Co(Oac)2·4H2O in aqueous solution at ambient temperature and structurally characterized. Crystal data for 1: triclinic system, space group P-1, a = 9.5544(2), b = 9.8640(2), c = 11.6338(3)(°A), α = 103.3790(10), β = 100.5600(10), γ = 96.2750(10)o, V = 1035.32(4)(°A)3, Z = 1, Dc = 2.789 g/cm3 and R = 0.0453. The X-ray crystal structure analysis shows that 1 is constructed by octamolybdate anions linked via corner-sharing interactions and hetero-metal links into the polymeric anionic sheet [Co(H2O)2(NH2NH2)2Mo8O27]n4n-, and further allied by [Na4(H2O)12]n4n+ sodium chains into a 3D framework with z-shaped channels. The mag-netic study of compound 1 indicates that weak antiferromagnetic coupling interaction occurs be-tween the cobalt centers.