SPIN-TRAPPING OF NITRIC-OXIDE (NO-CENTER-DOT) AS AMINOXYL RADICALS BYITS REACTION WITH 2 SPECIES OF SHORT-LIVED RADICALS DERIVED FROM AZO-COMPOUNDS SUCH AS 2,2'-AZOBISISOBUTYRONITRILE AND SOME ALIPHATIC-ALCOHOLS

Aminoxyl radicals of the type R(1)N(O.)R(2) are formed in the photoche mical reaction between nitric oxide (NO.) and carbon-centered radicals R(1). and R(2). R(1). was formed from azo compounds such as 2,2'-azob isisobutyronitrile (AIBN): R(1). = NC-C(CH3)(2), 2,2'-azobis(2,4-dimet hylvaleronitrile) (AMVN): R(1). = CH3-CH(CH3)-CH2-C(CN)CH3, or 4,4'-az obis(4-cyanovaleric acid) (ACVA): R(1). = HOOC-(CH2)(2)-C(CN) CH3. R(2 ). was derived from aliphatic substances such as methanol, ethanol, or 2-propanol by homolytic abstraction of a hydrogen atom brought about by R(1). from the azo compounds.