Novel ferrocene derived cyclocarbaphosphazenes: synthesis and structure of spiro {Fe(η-C5H5)-[η-C5H4CH2P(S)(CH2O)2PN]}(Me2NCN)2

The first examples of ferrocene derived cyclocarbaphosphazenes have been synthesized by the reaction of Fe(η-C5H5)-[η-C5H4CH2P(S)(CH2OLi)2] with (RR′NCN)2(Cl2PN) [RR′N=Me2N and PhCH2(Me)N]. The crystal structure of the spirocyclic compound {Fe(η-C5H5)-[η-C5H4CH2P(S)(CH2O)2PN)]}(Me2NCN)2 has been determined and shows an axial orientation of the ferrocenylmethyl group with respect to the six-membered chair form of the spirocycle.