¹³C NMR study of polyphenyl‐, poly‐<i>N</i>‐azolyl‐and poly‐<i>N</i>‐benzazoyl‐methanes

Abstract

Abstract 13 C NMR chemical shifts of 69 substituted methanes (general formula R 1 R 2 R 3 R 4 C, where the substituents were H, C 6 H 5 , Cl, OH, OR, imidazol‐1‐yl, pyrazol‐1‐yl, 1,2,4‐triazol‐1‐yl, 1,2,4‐triazol‐4‐yl, benzimidazol‐1‐yl, indazol‐1‐yl, indazol‐2‐yl, benzotriazol‐1‐yl and benzotriazol‐2‐yl) are reported. The effects of the various N ‐substituents on the 13 C chemical shifts of the heterocyclic nuclei are reported. The chemical shifts of the methane carbon atom are discussed using an interactive model. Some 1 H‐ 13 C coupling constants have been measured.