砷配合物As(S_2CNCy_2)_2I和As(S_2CNC_6H_(12))_3的合成和晶体结构(英文)  

Synthesis and Crystal Structure of Two Arsenic (Ⅲ) Complexes As(S_2CNCy_2)_2I and As(S_2CNC_6H_(12))_3

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作  者:尹汉东[1] 李蜂[1] 

机构地区:[1]聊城大学化学化工学院,聊城252059

出  处:《无机化学学报》2007年第3期451-455,共5页Chinese Journal of Inorganic Chemistry

基  金:国家自然科学基金(No.20271025);山东省自然科学基金(No.2005ZX09)资助课题

摘  要:合成了2种砷的氨荒酸配合物As(S2CNCy2)2I(1)和As(S2CNC6H12)3(2)。通过元素分析和红外光谱对其进行了表征,用X-射线单晶衍射测定了它们的晶体结构。配合物1的晶体属单斜晶系,空间群为P21/n,晶胞参数a=1.0209(4)nm,b=1.4680(5)nm,c=1.5218(5)nm,β=92.135(5)°和Z=4。配合物2的晶体属三方晶系,空间群为R3,使用六方坐标,晶胞参数a=1.6221(4)nm,c=2.1194(6)nm,并有Z=6。测试结果表明,配合物1为单核结构,中心砷原子为五配位的三角双锥配位构型,此外,在该配合物分子间存在弱的As…S相互作用(As…S 0.3512(4)nm),使得该配合物以弱桥连二聚体存在。在配合物2中,3个配体分别以双齿形式与砷原子配位,形成六配位的畸变三棱柱体结构。Two arsenic(Ⅲ) complexes with dithiocarbamate ligands, As(S2CNCy2)2I (1) and As(S2CNC6H12)3 (2) were synthesized and structurally characterized by elemental analysed, IR and single crystal X-ray diffraction analysis. Complex 1 crystallizes in the monoclinic system, space group P2 1/n, with a=1.020 9(4) nm, b=1.468 0(5) nm, c= 1.521 8(5) nm, β=92.135(5)°, and Z=4, while complex 2 crystallizes in the trigonal system, space group R3^-, with a=1.622 1(4) nm, c=2.119 4(6) nm, for hexagonal coordinate, and Z=6. Complex 1 has a mononuclear structure, the central arsenic atom is five-coordinated in a distorted trigonal bipyramid. An additional feature was noted in this structure, i.e. the presence of a short intermolecular As...S distance of 0.351 2(4) nm makes the structure as a weakly-bridged dimmer. In complex 2, The bidentate ligands are chelated to the arsenic atom, forming a coordination polyhedron which can be described as a distorted trigonal antiprism. CCDC: 607955, 1; 624814, 2.

关 键 词:砷配合物 晶体结构 氨荒酸配体 

分 类 号:O614.121[理学—无机化学]

 

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