65756-42-5Relevant articles and documents
Eshtiagh-Hosseini et al.
, p. 653 (1979)
Gas-Phase Infrared Spectra of the Unstable Phosphaalkenes CF2=PH, CF2=PCF3, and CH2=PCl: The C=P Stretching Vibration and Force Constant.
Ohno, Keiichi,Kurita, Eiichi,Kawamura, Masanobu,Matsuura, Hiroatsu
, p. 5614 - 5620 (2007/10/02)
Gas-phase infrared spectra of the unstable phosphaalkenes CF2=PH, CF2=PCF3, and CH2=PCl and their deuteriated species have been measured and vibrational assignments have been made.The C=P stretching bands are observed at 1349.5, 1350.2, and 1365.3 cm-1 for CF2=PH, CF2=PD, and CF2=PCF3, respectively, and at 979.7 and 847.9 cm-1 for CH2=PCl and CD2=PCl, respectively.Normal coordinates were treated for these molecules.For the fluorophosphaalkenes, the C=P stretching mode is highly coupled with the CF2 symmetric stretching mode; one of the coupled vibrations is shifted to higher wavenumber of about 1350 cm-1 and the other to lower wavenumber of about 730 cm-1.For CH2=PCl, the C=P stretching vibration of 979.7 cm-1 is almost negligibly perturbed by other vibrational modes, so that it gives an almost intrinsic C=P stretching wavenumber.For CD2=PCl, the C=P stretching mode is coupled largely with the CD2 scissoring mode.The band intensities of the C=P stretching vibration have also been discussed.The C=P stretching force constant was determined to be 562-668 N m-1.The values for the carbon-phosphorus force constants of the double and triple bonds are roughly two and three times, respectively, as large as the value for the single bond, and the values for the carbon-phosphorus bonds are about half the values for the corresponding carbon-nitrogen bonds.
