Singlet−Triplet Gap in Triplet Ground-State Biradicals Is Modulated by Substituent Effects
作者:David A. Shultz、Scot H. Bodnar、Hyoyoung Lee、Jeff W. Kampf、Christopher D. Incarvito、Arnold L. Rheingold
DOI:10.1021/ja020154+
日期:2002.8.1
semiquinones are attached 1,3 to a 5-substituted phenylene ring. The biradical complexes differ in their meta-substituents: 1-NMe(2)(), X = N,N-dimethylamino; 1-t-Bu, X = tert-butyl; 1-NO(2)(), X = nitro. All three structures have been determined by X-ray crystallography. Results of structural studies indicate that the biradical ligands of all three complexes have nearly identical conformations with