IR and polarized Raman spectra of (NH 3) 2(CH 2) 2HPO 4

Abstract

The IR and polarized Raman spectra of (NH 3) 2(CH 2) 2HPO 4 have been recorded and analyzed. In the crystal, symmetry of the HPO 4 ion is found to be reduced from C 3 v to C 1. The observed splittings indicate that the site symmetry and the correlation field effects are appreciable in the crystal. Strong vibrational coupling between the PO(H) stretching and POH out-of-plane bending modes is observed. Ethylene diammonium groups are crystallographically different in the unit cell.