Low-Energy Cobalt(III)-Catechol Electron Transfer. Subtle Coligand Bonding Effects for CoIII(N-N)(3,6-DBSQ)(3,6-DBCat) (N-N = 1,10-Phenanthroline, 5-Nitro-1,10-phenanthroline; DBSQ = Di-tert-butylsemiquinonato; DBCat = Di-tert-butylcatecholato)