Three new transition metal tricyanomethanide complexes [Co(dpdo)(tcm)2] (1), [Cu(dpdo)(tcm)2] (2) and Cu(dpdo)2(tcm)2 (3) were synthesized and structurally characterized. In compound 1 each Co(II) ...Three new transition metal tricyanomethanide complexes [Co(dpdo)(tcm)2] (1), [Cu(dpdo)(tcm)2] (2) and Cu(dpdo)2(tcm)2 (3) were synthesized and structurally characterized. In compound 1 each Co(II) ion is coordinated to four disorder tcm anions and one dpdo molecule to give a distorted octahedral geometry. In compound 2 each Cu(II) ion is surrounded by four tcm anions and one dpdo ligand to form a square bipyramidal geometry. Both compounds 1 and 2 display a μ1,5-tcm bridged infinite chain structure. Interestingly, in compound 3 coordination geometry around the central ion is square-planar, each Cu(II) ion is coordinated by two dpdo molecules to form a cationic part, the cationic parts is linked with the free tcm anionic parts via electrostatic attraction, leading to the formation of a mononuclear structure. Magnetic susceptibility measurement in the range 2--300 K indicates that there are antiferromagnetic couplings between adjacent metal ions in 1 (0=--2.33 K, C=2.13 cm3-mol 1oK) and 2 (J= --0.30, g = 2.20) respectively.展开更多
基金Project supported by the National Natural Science Foundation of China (No. 20571086).
文摘Three new transition metal tricyanomethanide complexes [Co(dpdo)(tcm)2] (1), [Cu(dpdo)(tcm)2] (2) and Cu(dpdo)2(tcm)2 (3) were synthesized and structurally characterized. In compound 1 each Co(II) ion is coordinated to four disorder tcm anions and one dpdo molecule to give a distorted octahedral geometry. In compound 2 each Cu(II) ion is surrounded by four tcm anions and one dpdo ligand to form a square bipyramidal geometry. Both compounds 1 and 2 display a μ1,5-tcm bridged infinite chain structure. Interestingly, in compound 3 coordination geometry around the central ion is square-planar, each Cu(II) ion is coordinated by two dpdo molecules to form a cationic part, the cationic parts is linked with the free tcm anionic parts via electrostatic attraction, leading to the formation of a mononuclear structure. Magnetic susceptibility measurement in the range 2--300 K indicates that there are antiferromagnetic couplings between adjacent metal ions in 1 (0=--2.33 K, C=2.13 cm3-mol 1oK) and 2 (J= --0.30, g = 2.20) respectively.