Synthesis and Molecular Structure of the Cu_4P_8 Cage Compound [Cu_4(P_4Ph_4)_2(PCyp_3)_3]

摘要

Linear and cyclic oligophosphanide anions (P_nR_n)~(2-) (n =2-4 and cyclo-(P_mR_(m-1))~- (m = 3-5) are an attractive class of ligands displaying a plethora of potential coordination modes.The linear dianionic (P_nR_n)~2 species were first obtained by Issleib et al.by reduction of cyclooligophosphanes cyclo-(P_nR_n) with alkali metals.The chain length of the (P_nR_n)~(2-) fragments can be controlled by the stoichiometry of the reaction.Subsequently,it was shown that ~(31)P NMR spec-troscopy can serve as a valuable tool to establish the identity of the resulting alkali metal salts M_2(P_nR_n).