Abstract The microwave spectra of three further isotopic species of chlorine isocyanate (35 Cl 15 N 12 C 16 O, 37 Cl 15 N 12 C 16 O, 35 Cl 14 N 13 C 16 O) have been measured. From them we have obtained rotational constants, centrifugal distortion constants, and nuclear quadrupole coupling constants. The data are combined with earlier data (1) to confirm the planarity of the molecule, and to give a full substitution structure as follows: Full-size ...
