94152-55-3Relevant academic research and scientific papers
(Dialkylamino)phosphines and their metal carbonyl complexes
King,Sadanani
, p. 3136 - 3139 (2008/10/08)
Reductions with LiAlH4 of (dialkylamino)dichlorophosphines, R2NPCl2, having sufficiently large dialkylamino groups lead to the corresponding (dialkylamino)phosphines, R2NPH2 (R2N = dicyclohexylamino and 2,2,6,6-tetramethylpiperidino), as very air-sensitive liquids characterized by proton and phosphorus-31 NMR spectroscopy. These (dialkylamino)phosphines react with (THF)M(CO)n (M = Cr and W, n = 5; M = Fe, n = 4) to give the corresponding metal carbonyl complexes R2NPH2M(CO)n. The complexes of the type R2NPH2M(CO)5 (M = Cr and W) are yellow, sublimable solids, which are considerably more stable than the free R2NPH2 ligands. Reduction of (diisopropylamino)dichlorophosphine, i-Pr2NPCl2, with LiAlH4 gives a solution shown by phosphorus-31 NMR to contain i-Pr2NPH2, but this product decomposes upon attempted isolation. However, the metal carbonyl complexes i-Pr2NPH2M(CO)5 (M = Cr and W) can be isolated as relatively stable yellow sublimable solids by the LiAlH4 reduction of the corresponding i-Pr2NPCl2M(CO)5 complexes.
