Vibrational spectra and structure of trisilylphosphine and trisilylphospine-d9

The infra-red spectra of P(SiH3)3 and P(SiD3)3 in the gas phase have been observed in the range 250–4000 cm−1. The corresponding spectrum of P(SiH3)3 in the solid state is also reported. The Raman spectrum of liquid P(SiH3)3 at −60° has been obtained. The combined results provide evidence that the PSi3 skeleton is planar, like the NSi3 skeleton of trisilylamine.