Reaction of [MI2(CO)3(NCMe)2](M = Mo or W) with a slight excess of 1,4,7-trithiacyclonoane ([9]aneS3) in CH2Cl2 at room temperature gave the cationic complexes [MI(CO)3([9]aneS3)]I 1 and 2 in high yield. Treatment of 1 and 2 with an excess of Na[BPh4] in methanol gave [MI(CO)3([9]aneS3)][BPh4]3 and 4. The molecular structure of [WI(CO)3([9]aneS3)][BPh4]4 has been determined by X-ray crystallography. It shows that the geometry around the tungsten centre is distorted capped octahedral with a capping carbonyl ligand. Room-temperature 13C NMR studies on complexes 1 and 2 indicate a unique CO ligand, demonstrating that their structures in solution are similar to that found for 4 in the solid state. Reaction of [MI2(CO)3(NCMe)L][M = Mo or W, L = PPh3; M = W, L = P(OPh)3] with an equimolar quantity of [9]aneS3 gave the seven-co-ordinate cation/anion complexes [MI(CO)2L([9]aneS3)][MI3(CO)4]5–7. Treatment of [MI2(CO)3(NCMe)2] with 1 equivalent of 2,5,8-trithia[9]orthocyclophane (ttoc) in CH2Cl2 at room temperature gave the dicarbonylmolybdenum complex [MoI2(CO)2(ttoc)]8 or the seven-co-ordinate cation/anion tungsten complex [WI(CO)3(ttoc)][WI3(CO)4]9. Reaction of [MI2(CO)3(NCMe)L] with an equimolar amount of ttoc gave [MI(CO)2L(ttoc)][MI3(CO)4]10–12. The complex [WI2(CO)3(NCMe)(PPh3)] was also shown to have a distorted capped-octahedral geometry by X-ray crystallography.
室温下,[MI2(CO)3(NCMe)2](M = Mo 或 W)与略微过量的 1,4,7-三
硫杂
环戊烷([9]aneS3)在
CH2Cl2 中反应,得到阳离子络合物[MI(CO)3([9]aneS3)]I 1 和 2,产率很高。在
甲醇中用过量 Na[BPh4] 处理 1 和 2,得到 [MI(CO)3([9]aneS3)][BPh4]3 和 4。X 射线晶体学确定了 [WI(CO)3([9]aneS3)][BPh4]4 的分子结构。结果表明,
钨中心周围的几何结构是一个带帽羰基
配体的扭曲八面体。对复合物 1 和 2 进行的室温 13C NMR 研究表明,它们具有独特的 CO
配体,这表明它们在溶液中的结构与 4 在固态中的结构相似。将[MI2(CO)3(NCMe)L][M = Mo 或 W,L = PPh3;M = W,L = P(OPh)3]与等摩尔量的[9]aneS3 反应,可得到七配位阳离子/阴离子配合物[MI(CO)2L([9]aneS3)][MI3(CO)4]5-7。室温下,在 中用 1 个当量的 2,5,8-三
硫杂[9]原环烷(ttoc)处理 [MI2(CO)3(NCMe)2],可得到二羰基
钼络合物 [MoI2(CO)2(ttoc)]8 或七配位阳离子/阴离子
钨络合物 [WI(CO)3(ttoc)][WI3(CO)4]9。MI2(CO)3(NCMe)L] 与等摩尔量的 ttoc 反应,得到 [MI(CO)2L(ttoc)][MI3(CO)4]10-12。X 射线晶体学研究还表明,[WI2(CO)3(NCMe)(PPh3)] 复合物具有扭曲的封顶八面体几何结构。