An ESR study of biradicals formed from two 4-amino-TEMPOs linked by -(CH2)n-, (n = 2, 3, 4, 6)

A homologous series of biradicals formed from two 4-amino-TEMPOs separated by -(CH2)n- (n = 2, 3, 4, 6) chains are presented. Electron coupling coefficients were determined in ESR spectroscopy and molecular thermodynamic parameters were calculated.