This compound decom-The a-and methacrylate precursors was developed. was found to be a major component of the isobutylene-nitric oxide reaction product. posed readily to 0, X-bis (ni tro-t-buty1) hydroxylamine and a mixture of CY-and p-nitroisobutylene. b- nitroisobutylenes were found to equilibrate in the presence of a variety of basic catalysts.