Lineare Oligophosphaalkane, XXVIII [1] Redox-Cyclisierung funktioneller Methylenbisphosphane XRP-CH2-PRX (X = H, C) mit Cyclopolyphosphanen / Linear Oligophosphaalkanes, XXVIII [1] Redox Cyclization of Functional Methylenebisphosphanes XRP-CH2-PRX (X = H, Cl) with Cyclopolyphosphanes

Reaction of P-H or P-Cl functional methylenebisphosphanes X (R )P - CH2-P(R)X (X = H, Cl; R = Ph, tBu) with cyclopolyphosphanes (R′P)„ (R′ = Ph, tBu, Me; n = 4, 5) affords cyclocarbatetraphosphanes CH2(RP)2(R′P)2 (2-6 ). The cyclopolyphosphanes (R′P)„ em ployed may be synthesized in situ by reaction of chlorophosphanes R′PCl2 with primary phosphanes R′PH2, LiH or magnesium, respectively, providing a single stage synthesis for unsymmetrically substituted cyclocarbatetraphosphanes.