The dominant conformer is the (E,Z ) labelled according to the OCNH/HOCN dihedrals with the (Z,Z ) at +11.9 kJ mol -1 , the (Z,E ) at +14.3 kJ mol -1 , and the (E,E ) at +25.3 kJ mol -1 in all cases the molecules exhibit C s symmetry, Fig. . kJ mol -1 as found here for the (E,Z ).