摘要
本文从结构化学角度,阐述了标题化合物的EI质谱断裂行为。这些化合物的分子离子基本上按分步断裂分别失去羰基,直至获得[CH_3CCo_3(PPh_2CH_2PPh_2)]^+和[CH_3CCo_3]^+。然后,这些残基和含膦配体继续断裂,失去Ph、PhP、Ph_3P、C_7H_7、C_6H_6、C_2H_2、H_2和Co等,生成各种相应的三核、二核和单核钴的碎片离子。
The electron ionization mass spectra of the title compounds are studied based on the data of crystal structure and the view of structural chemistry. Both the clusters give similar primary processes of the fragmentation. Firstly the carbonyls are broken down successively from parent molecular ion until (μ3--CH3C)CO3Ln+(L = PPh2CH2PPh2,n = 0,1)to be obtained. The ligand PPh2CH2PPh2 can either be split off as a series of the radicals (Ph,PhP,Ph2P,Ph3P...)or as a fragment still coordinated to (μ3-CH3C) Co3 residue. Besides,ellimination of H2 or C2H2 from CH3C moiety in molecule of cluster also occurs.
