铁钴三核原子簇氢化物HFe2Co(CO)9PR和HFe2Co(CO)9Se的合成

SYNTHESES OF THE NEW MIXED IRON COBALT CLUSTER HYDRIDES HFe2Co(CO)9PR AND HFe2Co(CO)9 Se

Co(CO)PR(R=NEt,t-Bu,Ph)与Na[Fe(CO)]在THF中反应,合成了以有机膦作μ-配位体的新型铁钴三核原子簇羰基氢化物HFeCo(CO)PR.又用高压法合成FeCO(CO)Se,它与Na[Fe(CO)]在THF中反应,得到另一个以硒作μ3-配位体的新型铁钴三核原子簇羰基氢化物HFeCo(CO)Se.上述合成的原子簇化合物在极性溶剂中按酸式电离成一价阴离子,再与(PPN)Cl反应生成[FeCo(CO)PPh](PPN),[FeCo(CO)PBu-t](PPN)和[FeCo(CO)Se](PPN)盐.

Reaction of Co(CO)PR(R=NEt,t-Bu,Ph)with Na[Fe(CO)]in THF solution leads to the formation of the new mixed iron cobalt phosphine cluster hydrides HFeCo(CO)PR(R=NEt,t-Bu,Ph)in yields of 30~38%.Spectral data reveal that they have structure similar to those of FeCo(GO)PPh cluster,i.e.,a FeCoP frame-work trigonal pyramid.Another new mixed iron cobalt selenide cluster hydride HFeCo(CO)Se is also obtained in 37%yield by reaction of FeCo(GO)Se with Na[Fe(CO)].The cluster hydrides undergo acidic dissociation in polar solvents and the resulting anions were isolated as salts[FeCo(CO)PBu-t](PPN),[FeCo(CO)PPh](PPN)and[FeCo(CO)Se](PPN)respectively.