The cyclic carbophosphazene N3P2CCl5 reacts with sodium methoxide, sodium trifluoroethoxide, and sodium phenoxide to yield the corresponding pentaalkoxy- and pentakis(aryloxy)cyclocarbophosphazenes. By contrast, N3P2CCl5 does not react with the main group and transition metal nucleophiles lithium diphenylphosphide and lithium pentacarbonylmanganate and reacts incompletely with sodium dicarbonyl(η5-2,4-cyclopentadien-1-yl)ferrate. The title compound undergoes thermal ring-opening polymerization when heated to 120°C. This polymerization was monitored by 31P NMR spectroscopy. Aspects of the mechanism of polymerization are discussed. Crystal structures of N3P2CCl5 and N3P2C(OPh)5 were obtained by X-ray diffraction. The crystals of N3P2CCl5 are orthorhombic, of space group Pbca, with a = 7.7880 Å, b = 29.3560 Å, c = 16.7990 Å, β = 90.00°, V = 3840 Å3, and Z = 16, whereas crystals of N3P2C(OC6H5)5 are triclinic, of space group P1̄, with a = 10.249(2) Å, b = 12.290(4) Å, c = 14.437(2) Å, α = 84.65(2)°, β = 85.57(1)°, γ = 70.82(2)°, V = 1708.08 Å3, and Z = 2.
All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Inorganic Chemistry