The ribose conformations of 8-azaadenosine, 8-azaguanosine, and 8-azainosine have been studied using proton magnetic resonance in ND3 solutions, in D2O solutions, and in pyridine solutions. The temperature was varied between -60 and +40 degrees C in ND3 and between +10 and +60 degrees C in D20 solutions. The analysis is based on the two state S in equilibrium N model of the ribose moiety propos...