Synthetic and structural studies of lithium complexes of selenophosphorus ligands.

摘要: The synthesis and characterization of three lithium complexes selenophosphorus anions are presented:  namely, a selenophosphinite [Ph2PSeLi·TMEDA]2, 1; diselenophosphinate [Ph2PSe2Li·THF·TMEDA], 2; dilithiated triselenophosphonate complex [(c-C6H11)PSe3Li2·2TMEDA], 3. 1 was prepared using the insertion reaction elemental Se into P−Li bond lithiated diphenylphosphine, this then oxidized by additional to give 2. Dilithiation primary phosphine followed with 3 equiv gave X-ray crystallography reveals be dimer in solid state two different bridging coordination modes exhibited ligands, 2 both monomeric. In addition, solution studies multinuclear (31P 77Se) variable-temperature NMR show anionic charge predominately localized on 1, fully delocalized over PSe2 PSe3 moieties respective...