fac-[W(CO)3(η2-diphos)(NCMe)] 1–3 [diphos = 1,1′-bis(diphenylphosphino)ferrocene (dppf), dppm (Ph2PCH2PPh2) or dppe (Ph2PCH2CH2PPh2)] with the corresponding diphosphines. The initially afforded facial isomers are converted into the meridional forms (4m–9m) in a subsequent, slow rearrangement process through opening of the chelated diphosphine ligand. A five-co-ordinate, square-pyramidal intermediate is
络合物FAC - [W(CO)3(η 2 -dppf )(η 1 -dppm)] 4f中,FAC - [W(CO)3(η 2 -dppm)(η 1 -dppf )] 5F,FAC - [W(CO)3(η 2 -dppf )(η 1 -dppe)] 6F,FAC - [W(CO)3(η 2 -dppe)(η 1 -dppf )] 7F,FAC - [W(CO )3(η 2 -dppm)(η 1 -dppe)] 8F和FAC - [W(CO)3(η 2-dppe)(η 1 -dppm)] 9F已经制备通过处理FAC - [W(CO)3(η 2 -dIPHOs)(NCMe)] 1-3 [DIPHOS = 1,1'-双(
二苯基膦基)
二茂铁(dppf ),dppm(Ph 2 PCH 2 PPh 2)或dppe(Ph 2 PCH 2 CH 2 PPh 2)]与相应的
二膦。最初提供的面部异构体在随后的缓