High temperature, high resolution infrared spectral measurements on the HNCndash;HCN equilibrium system

摘要

Spectral measurements have been made on HNC in equilibrium with HCN at temperatures ranging from 900 to 1250 K. From measurements of absorption intensity vs temperature it is determined that the ground state of HNC is 10.3plusmn;1.1 kcal/mol (43.1plusmn;4.6 kJ/mol) above the ground state of HCN. High resolution data are given on the following vibrational transitions for HNC near 3650 cmminus;1: 1000ndash;0000, 1110ndash;0110, 1200ndash;0200, and 1220ndash;0220. Measurements near 2780 cmminus;1are also given for the 1000ndash;0000 and 1110ndash;0110 transitions for DNC. Aside from the low bending force constant, these measurements show nothing unusual about the bending potential function.