The ethyllmethyl migration aptitudes were determined for photolysis of a series of 2- substituted 2-butyl azides, where the 2 substituent was an aryl group (la-f), Ph (CH& (2-4), or a n-propyl group (5). Comparison of n-propyl/methyl and n-propyllethyl migration aptitudes were also made (7-8). When an aryl group was directly attached to the carbon bearing the azido group, the ethyllmethyl and n-propyllmethyl migration aptitudes ran 1.4-1.6, and the ...
