In the gas phase, all of the 3c methods gave similar energy orderings to ωB97X-D4/def2-TZVP. PBEh-3c gave exactly the same ordering; B97-3c, r2SCAN-3c, and ωB97X-3c moved one conformer lower in the ranking but were otherwise the same and HF-3c inverted the order of several energetically similar conformers, see Table HF-3c showing larger changes than the other methods, see Table .