Synthesis, Structures Of Cyano-Bridged Coordination Compounds And Coordination Compounds With Formate As Ligands

Nine cyano-bridged coordination compounds(1～9) and eight coordination compounds(10～ 17) with formate as ligand have been synthesized and characterized by IR, ICP. Among them, three compound have been characterized by X-ray single crystal diffraction. The formulas of these three compounds are as follows:[Cu₄(CN)₅(DMF)₄]_n 1[Cu₅(CN)₆(DMF)₄]_n 2[Ni(Hdmg)₂(HCO₂)₂]·2HCOOH (Hdmg = dimethylglyoxime) 10The single-crystal structural determination reveals that both compound 1 and 2 are mixed-valence copper( I /II)compounds. In the structure of two compounds, Cu atoms are connected by bridging cyanide ligands with μ₂ and μ₃ mode into three-dimensional networks.Compound 10 is a mononuclear compound. The Ni(II) cation has a distorted octahedral geometry defined by five N atoms from two dimethylglyoxime molecules and two O atoms from two formate anions. The two terminal formate anions lie cis- position of the octahedral geometry.Two copper coordination compounds with phen or dmg as ligands have been synthesized and characterized by IR and X-ray single crystal diffraction. The formulas of these compounds are as follows:[Cu(phen)₂Cl]NO₃·H₂O (phen = phenathroline) 18[Cu₂(dmg)₄] 19The single-crystal structural determination reveals that compound 18 is a mononuclear compound, the central Cu(II) cation has a slightly distorted trigonal bipyramid geometry. Compound 19 is a binuclear compound, two equal Cu atoms with distorted square-pyramid are...