Chemistry of selected cyclic P(III) compounds possessing a P–Cl bond

The compounds [CH2(6-t-Bu-4-Me-C6H2O)2]PCl (1), (OCH2CMe2CH2O)- PCl (2), and [ClPN(t-Bu)]2 (3) have been utilized as precursors in the synthesis of (i) new pentacoordinate phosphorus compounds [e.g. CH2(6-t-Bu-4-Me-C6H2O)2 P(NRR´)(O2C6Cl4), CH2(6-t-Bu-4-Me-C6H2O)2PX[OC(O-i-Pr)N=N(C(O)O-i-Pr)], (ii) cyclic phosphates and their complexes [e.g. {imidazolium}+{CH2(6-t-Bu-4-Me- C6H2O)2PO2}–.MeOH], (iii) new cycloaddition products [e.g. {CH2(6-t-Bu-4-Me- C6H2O)2}P{C(CO2Me)C(CO2Me)C(O)N}, (iv) macrocyclic compounds [e.g. {[(t- BuN)P]2[–OCH2CMe2CH2O–]}2] and (v) phosphonates [e.g. (OCH2CMe2CH2O)P (O)CH2C(CN)=CHC5H4FeC5H5]. The synthetic and structural aspects of these new products are discussed.