Phosphido hydrido complex

Dinuclear complexes with bridging phosphido, hydrido, and diphosphine ligands were formed via some interesting transformations, such as P—C bond formation, P—H bond activation, and conversion of a chelate diphosphine to one bridging two metal centers.259... 

T e Co and Ni Vdppm/NaBH4/CO reactions discussed above are normally carried out such that the NaBH4 is added over a period of 10-30 minutes. If, however, the addition time is decreased to one minute or less, the reactions follow an entirely different course and phosphido-bridged complexes are produced (25) in acceptable yields. Thus, with reactant ratios of 1 2 3, the reaction with C0CI2 gives the hydrido-phosphido bridged complex 12 [ P NMR 8P 47.6 (d), SPg 215.6 (quintet), J 54 Hz. H NMR SCo-H -17.75 (sextet), J values PaH = PgH = 29.2 Hz. IR Oco 1921 cm" ], in 20-30% yield after recrystallization. Small amounts of 2 are also formed and this contaminates later crops of 12 in the recrystallization process. Complex 12 can also be produced, together with the known (26) 13, in... 

Palladium(I) dimeric complexes are also known where the Pd-Pd bond is supported by electron-deficient hydrido or silyl ligands. In the case of SiR2H bridges, an agostic interaction (see Agostic Bonding) of one of the Pd atoms with the Si-H bond is observed (9). The same feature has been found for some phosphido-bridged Pd(I) dimers. 

O4M02PC23H29, Molybdenum, tetracarbonyl-bis(Ti -cyclopentadienyl)(p,-di-tert-butyl-phosphido)- jL-hydrido-di, 25 168 Oghl4CioFIi23 Xanthosine palladium(II) complexes, 23 54... 

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