Gas-phase on-line generation and infrared spectroscopic investigations of polyphosphazenes, (NPX2)3 where XÂ =Â F, Cl and Br

The products were characterized by the infrared spectra of their vapors. The low-resolution gas-phase Fourier transform infrared spectra reported for the first time show strong bands centered at 1295, 1215 and 1200 cm−1, assigned to ν7(E′), in plane PN stretching mode of (NPX2)3, where X = F, Cl and Br, respectively.