“…The reactions of compound 1 with amines and alcohols have been reviewed [10,11]. The structures of 1 [12] and some of its derivatives, such as its pentaamide derivative (PhNH) 3 P N P(O)(NHPh) 2 [13], its geminal-bis(diisopyropylamino) derivative Cl[NCH(CH 3 ) 2 ] 2 P N P(O)Cl 2 [14], and its geminalbis(2,4,6-tert-butylphenoxide) Cl(OC 6 H 2 Bu t -2,4,6) 2 -P N P(O)Cl 2 and bis(2,6-di-tert-butyl-4-methylphenoxide) Cl(OC 6 H 2 Bu t -2,6-Me-4) 2 P N P(O)Cl 2 derivatives [15] have been reported. These molecules can be used as structural models for the inorganic polymers with a large range of properties [2,16] and applications [17][18][19][20][21][22][23][24].…”