Matrix isolation Raman spectroscopy, semiempirical calculations and normal coordinate analysis of strained systems - Part I: 2,3-diazabicyclo[2.2.1]hept-2-ene
The Raman wavenumbers of 2,3-diazabicyclo[2.2.1]hept-2-ene (DBH), isolated in a low-temperature matrix, are presented and assignments for all vibrational fundamentals are proposed. The molecular structure of DBH is calculated by means of semi-empirical quantum-mechanics and a normal coordinate analysis of the strained bicyclic system is performed in internal coordinates using a valence force field. A detailed description of a homemade matrix isolation setup is given.