Synthesis and Crystal Structures of Dioxomolybdenum(VI) Complexes with ONS-Donor Ligands
作者:Ngui Khiong Ngan、Chee Seng Wong、Kong Mun Lo
DOI:10.1007/s10870-011-0160-1
日期:2011.11
Three dioxomolybdenum complexes namely dioxo(5-chlorosalicylaldehyde thiosemicarbazonato) dimethylsulfoxide molybdenum(VI) (C1), dioxo(5-chlorosalicylaldehyde 2-ethylthiosemicarbazonato) dimethylsulfoxide molybdenum(VI) (C2) and dioxo(5-chlorosalicylaldehyde N-phenylthiosemicarbazonato) dimethylsulfoxide molybdenum(VI) (C3) were prepared. The compounds all crystallize in the triclinic space group P-1 with a = 7.3184(3) Å, b = 7.5035(3) Å, c = 14.9713(6) Å, α = 85.005(2)°, β = 85.616(2)°, γ = 66.987(2)° for C1, a = 8.2339(1) Å, b = 10.1739(1) Å, c = 10.4017(1) Å, α = 78.486(1)°, β = 89.312(1)°, γ = 81.730(1)° for C2, a = 7.0591(1) Å, b = 9.5603(1) Å, c = 14.5762(2) Å, α = 76.280(1)°, β = 81.351(1)°, γ = 81.985(1)° for C3. In general, the overall geometry of these complexes can be regarded as a distorted octahedron with the tridentate thiosemicarbazonato ligands (L2−) bonded to the MoO2 2+ core, with the imine nitrogen, phenoxyl oxygen, sulfur atom and one of the terminal oxygen atoms of the dioxomolybdenum occupying the equatorial position. The sixth coordination site is occupied by the dimethylsulfoxide (DMSO) solvent molecules. The adjacent molecules of C1 are linked by N–H···N intermolecular hydrogen bonding, forming polymeric chains that run parallel to the bc plane. On the other hand, C2 is a discrete molecule while the molecules of C3 associate via weak N–H···O hydrogen bonding interaction to form a polymeric chain that runs along the a-axis. Crystal Structures Study of The Thiosemicarbanone Dioxomolybdenum(VI) Complexes.
制备了三种二氧钼配合物,即二氧(5-氯水杨醛缩氨基硫脲)二甲基亚砜合钼(VI)(C1)、二氧(5-氯水杨醛缩2-乙基氨基硫脲)二甲基亚砜合钼(VI)(C2)和二氧(5-氯水杨醛缩N-苯基氨基硫脲)二甲基亚砜合钼(VI)(C3)。这些化合物均结晶于三斜晶系P-1空间群,C1的晶胞参数为a=7.3184(3) Å,b=7.5035(3) Å,c=14.9713(6) Å,α=85.005(2)°,β=85.616(2)°,γ=66.987(2)°;C2的晶胞参数为a=8.2339(1) Å,b=10.1739(1) Å,c=10.4017(1) Å,α=78.486(1)°,β=89.312(1)°,γ=81.730(1)°;C3的晶胞参数为a=7.0591(1) Å,b=9.5603(1) Å,c=14.5762(2) Å,α=76.280(1)°,β=81.351(1)°,γ=81.985(1)°。这些配合物的整体几何结构可以视为扭曲的八面体,三齿氨基硫脲配体(L2−)与MoO2 2+核心相连,亚胺氮、苯氧基氧、硫原子和二氧钼的一个端氧原子占据赤道位置。第六个配位点由二甲基亚砜(DMSO)溶剂分子占据。C1的相邻分子通过N–H···N分子间氢键连接,形成平行于bc平面的聚合物链。另一方面,C2为离散分子,而C3的分子通过微弱的N–H···O氢键相互作用形成沿a轴方向的聚合物链。三聚氰胺二氧钼(VI)配合物的晶体结构研究。