Synonyms: Phosphorus(1+),tetrakis(N,N,N',N',N'',N''-hexamethylphosphorimidic triamidato-N''')-,chloride, (T-4)-; Phosphorimidic triamide, N,N,N',N',N'',N''-hexamethyl-,phosphorus complex; Phosphorimidic triamide, phosphorus(1+) deriv.;Tetrakis[tris(dimethylamino)phosphoranylideneamino]phosphonium chloride