Cycloaddition Reactions of the Diphosphenyl Complex (η5-C5Me5)(CO)2Fe-P=P-Mes* (Mes* = 2,4,6-tBu3C6H2) with Hexafluoroacetone. X-Ray Structure Analyses of (η5-C5Me5)(CO) Fe P(=PMes*)OC(CF3)2CO and (η5-C5Me5)(CO)2FePP(Mes*)OC(CF3)2

Weber L, Buchwald S, Lentz D, Preugschat D, Stammler H-G, Neumann B. Cycloaddition Reactions of the Diphosphenyl Complex (η5-C5Me5)(CO)2Fe-P=P-Mes* (Mes* = 2,4,6-tBu3C6H2) with Hexafluoroacetone. X-Ray Structure Analyses of (η5-C5Me5)(CO) Fe P(=PMes*)OC(CF3)2CO and (η5-C5Me5)(CO)2FePP(Mes*)OC(CF3)2. Organometallics. 1992;11(7):2351-2353.The diphosphenyl complex (eta-5-C5Me5)-(CO)2Fe-P=P-Mes* (Mes* = 2,4,6-tBu3C6H2) undergoes a [3 + 2] dipolar cycloaddition with hexafluoroacetone to give the metalla heterocycle (eta-5-C5Me5)(CO)-Fe-P(=PMes*)OC(CF3)2C(O) with a remarkably short Fe-P bond (2.084 (4) angstrom) and an exocyclic P=P bond. When stored in solution at -40-degrees-C, this complex partly rearranges to the metalated 1-oxa-2,3-diphosphetane (eta-5-C5Me5)(CO)2Fe-P-P(Mes*)OC(CF3)2. The molecular structures of both isomers were elucidated by single-crystal X-ray analyses

On the Reactivity of Metallodiphosphenes (η5-C5Me5)(CO)2Fe-P=P-R (R = C(SiMe3)3; 2,4,6-tBu3C6H2) Towards Isocyanides. Formation and Structures of 2-Iminodiphosphiranes and 2,4 Diimino-1,3-diphosphetanes

Weber L, Buchwald S, Lentz D, Stamm O, Preugschat D, Marschall R. On the Reactivity of Metallodiphosphenes (η5-C5Me5)(CO)2Fe-P=P-R (R = C(SiMe3)3; 2,4,6-tBu3C6H2) Towards Isocyanides. Formation and Structures of 2-Iminodiphosphiranes and 2,4 Diimino-1,3-diphosphetanes. Organometallics. 1994;13(11):4406-4412