Synthesis and crystal structure determination of 0D-, 1D- and 3D-metal compounds of 4-(pyrid-4-yl)-1,2,4-triazole with zinc(II) and cadmium(II)
作者： Anas Tahli , Jana K. Maclaren , Ishtvan Boldog , Christoph Janiak
DOI: 10.1016/J.ICA.2011.03.072
关键词:
摘要: Abstract The potentially tritopic bridging ligand 4-(pyrid-4-yl)-1,2,4-triazole (pytz) reacts with cadmium(II) nitrate tetrahydrate, Cd(NO3)2·4H2O and sodium dicyanamide (Na-dca) to form the molecular complex [Cd(dca)2(κNpy-pytz)2(H2O)2] (1). cadmium atom lies on a center of inversion is coordinated in slightly distorted octahedral geometry by trans-oriented pytz ligands, anions aqua ligands. coordinates through Npyridin metal atom. complexes are connected 3D supramolecular network O–H···Ndca O–H···Ntriazole hydrogen bonds. From zinc(II) bromide compound 1D-[ZnBr2(μ-κNpy,Ntz-pytz)] (2) obtained where pytz-ligand bridges between tetracoordinated atoms coordination its Npyridine- Ntriazole-atoms. Adjacent chains C–H···Br C–H···N bonds structure. Single crystals 2 crystallize homochiral non-centrosymmetric space group P212121. origin homochirality formation hydrogen-bonded helices around 21 screw axes same sense rotation (left-handed or M investigated crystal). Cd(NO3)2·4H2O, thiocyanate (NaSCN) give framework 3D-[Cd(μ-SCN)2(μ-κNpy,Ntz-pytz)] (3). Parallel layers 2D-{Cd(μ-SCN)2}-nets (6,3)-net topology assembled pytz-ligands into 3D-structure. two Ntriazole-coordination.
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