LINEAR FREE-ENERGY RELATIONSHIPS BETWEEN STABILITY PARAMETERS OF SUBSTITUTED TROPYLIUM AND CYCLOPROPENYLIUM IONS AS MEASURED BY REDUCTION RATE WITH CHROMIUM(II), REDUCTION POTENTIAL, CHARGE-TRANSFER ENERGY, AND pKR+ VALUES
Nine tropylium ions have been synthesized and the empirical stability parameters (i)-(iv) have been measured along with the parameters of known tropylium and cyclopropenylium ions: (i) the Cr(II)-ion reduction rate constant (k2) in 10percent aq