Preparations and spin-spin interactions of 4,4′-(m-Phenylene)bis(1-methyl-2,6-diphenylpyridinyl) and its analogue

Article abstract of DOI:10.1016/00404-0399(50)1261-F

4,4′-(1-Phenylene)bis(1-methyl-2,4,6-triphenylpyridinium) (12⁺) and 4,4′,4″-(benzene-1,3,5-triyl)tris(1-methyl-2,4,6- triphenylpyridinium) (23⁺) were synthesized and their metal reductions were studied; 12⁺ gave the triplet diradical (1) in the ground state, and 23⁺ produced also a triplet diradical and the expected quartet species was not observed.