Lithium hexaphenylantimonate

Pentaphenylantimony readily reacts further with phenyllithium, then forming lithium hexaphenylantimonate ... 

The octet rule does not apply to elements of higher periods. Oxidation levels of +3 and +4 stand for normal oxidation levels of phosphines or phosphonium salts, but the valence shell can be expanded beyond that. Tetraphenylphosphonium iodide readily combines with phenyllithium to afford the colorless and crystalline but ether soluble pentaphenylphosphorane (62). Would it be possible to produce a lithium hexaphenylphosphate (63) by merely using phenyllithium in excess (Scheme 1-44) Such an expansion of the valence shell of pentaphenylstiborane to the electron dodecet of lithium hexaphenylantimonate is possible indeed.However, the smaller phosphorus atom tolerates steric congestion not as well. When a series of pentaarylphosphoranes was incubated with the corresponding aryllithiums, no high-field P nmr signal testifying the presence of an ate complex was detected. ... 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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