in tetrahydrofuran; N,N-dimethyl-formamide to 8.74 mmol CH3Br in THF at -78°C is added a soln. of 0.40 mmol Li4P26*16THF in DMF at -55°C; after 40 min at -78°C the main product is Li2P26(CH3)2, after additional 5 min LiP26(CH3)3; not isolated, detected by (31)P-NMR;

in tetrahydrofuran; N,N-dimethyl-formamide to 6.06 mmol EtBr in THF at -78°C is added a soln. of 1.01 mmol Li4P26*16THF in DMF at -55°C; after 40 min at -78°C the main product is Li2P26(C2H5)2, after 12 h at -20°C LiP26(C2H5)3; not isolated, detected by (31)P-NMR;