The Molecular Structures of HNC and HCN Derived from the Eight Stable Isotopic Species

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Abstract
Ground vibrational state rotational transitions have been measured for the following isotopic species of HNC: H15NC, H15N13C, DN13C, D15NC and D15N13C. Similar transitions have also been measured for H13C15N and D13C15N. These measurements complete the set of rotational constants for the eight stable isotopic species of the two molecules. Molecular structures are calculated from these data in several ways and are compared with the results of recent ab initio calculations.