Diastereomeric Halfsandwich Rhenium Complexes Containing Hemilabile Phosphane Ligands
作者:Stefan Dilsky、Wolfdieter A. Schenk
DOI:10.1002/ejic.200400552
日期:2004.12
bidentate phosphane ligand. Of the chelate complexes 5a−e, those with R′ = 2-C6H4OMe (5a, d) decomposed in solution at room temperature. In donor solvents, the chelate ring opens giving the stable solvated complexes [CpRe(NO)P(Ph)(R)(R′)}](solvent)]BF4 (solvent = CH3CN, THF) (6b−e, 7d). The new compounds are thus suitable starting materials for the syntheses of diastereomeric rhenium complexes [CpRe(
非对映铼配合物[CpRe(NO)(CO)P(Ph)(R)(R')}]BF4 (R = Me, Ph; R' = 2-C6H4OMe, CH2C4H3S, CH2C4H7O)的合成和一些典型反应) (3a-e) 进行了描述。在 THF 中用 NaBH4 还原羰基配体得到相应的甲基配合物 [CpRe(NO)P(Ph)(R)(R')}(CH3)] (4a-e)。甲基配合物的酸处理导致甲烷的释放和潜在双齿膦配体的额外供体位点的配位。在螯合物 5a-e 中,那些具有 R' = 2-C6H4OMe (5a, d) 的化合物在室温下在溶液中分解。在供体溶剂中,螯合环打开产生稳定的溶剂化复合物 [CpRe(NO)P(Ph)(R)(R')}](solvent)]BF4(溶剂 = CH3CN,THF)(6b-e,7d )。因此,新化合物是合成非对映铼配合物[CpRe(NO)P(Ph)(R)(R')}(L)]BF4的合适起始材料。(©