VIBRATIONAL-SPECTRA AND MOLECULAR MECHANICS AND AB-INITIO CALCULATIONS FOR 1,3-DIOXOLE - CONFIRMATION OF NONPLANARITY
Academic Article
Overview
Identity
Additional Document Info
Other
View All
Overview
abstract
Infrared and Raman spectra of the vapor, liquid, and solid phases of 1,3-dioxole have been recorded and analyzed. Much of the spectra can be interpreted assuming C2v symmetry. However, several combination bands with the ring-puckering vibration along with the observation of an otherwise inactive mode confirm the non-planarity of this molecule. The observed frequencies are compared with predicted values from molecular mechanics (MM3) and ab initio (STO3-21G) calculations. These calculated values provide useful estimates but about half of them differ from the observed values by more than 50 cm1. Several predicted values disagree by more than 200 cm1. 1995, All rights reserved.