Thiolate and Thioether Functions as Donor Groups X, Y in Tripod Ligands RCH2C(CH2PPh2)(CH2X)(CH2Y) – Synthesis and Coordination Chemistry
作者:Rainer Soltek、Gottfried Huttner
DOI:10.1002/(sici)1099-0682(199810)1998:10<1417::aid-ejic1417>3.0.co;2-h
日期:1998.10
uncoordinated SH function at the dangling arm of the ligand. If the SH functions of a potential tripod ligand are deprotonated the resulting thiolate functions are found to strongly coordinate in compounds such as [η3-CH3C(CH2PPh2)2(CH2S)}(CO)3Mo]– which are obtained as their lithium and sodium salts 6. These highly reactive species may be stabilized by encapsulating their alkali counter ions in cryptands and
三脚架配体 RCH2C(CH2PPh2)(CH2X)(CH2Y) (1),其中 X,Y = SA烷基,SBzl 在 –40 °C 下用 Li/NH3/THF 选择性地还原 SBzl 功能,生成 RCH2C(CH2PPh2)(CH2X )(CH2Y) (2) (X, Y = SA烷基, SH)。在这些混合供体组配体中,SH 函数是最不配位的,因此 [η2-CH3C(CH2PPh2)(CH2SEt)(CH2SH)}(CO)4Mo] (5) 是一种稳定的化合物,在配体的悬臂。如果潜在的三脚架配体的 SH 官能团去质子化,则发现所得的硫醇盐官能团在化合物中强烈配位,例如 [η3-CH3C(CH2PPh2)2(CH2S)}(CO)3Mo]– 作为其锂和钠盐 6. 这些高活性物质可以通过将它们的碱反离子封装在穴状配体和相应的盐中,用 [2,1,1] 穴状配体 (7a) 和 [2,