Abstract
The polymerization of nitrogen-substituted vinyl monomers by halogens and their compounds has been the subject of active research over the last 12 years. Several interesting features including, in particular, the development of the concepts of charge transfer polymerization [1, 2] have resulted from such studies. This article is intended to highlight the significant developments to date in the field of polymerization of nitrogen vinyl monomers by halogens and halogen-containing electron transfer agents with relevant reference to earlier work in these fields [1, 3]. In addition, the controversial developments in polymerization of these monomers by hydrogen halides and other organic halides will also be discussed. However, the general features of polymerization of these monomers by metal halides, recently reviewed by Biswas and Chakravorty [4], will not be included in the discussion.