Transition metal mediated polymerization

Suginome, M. and Ito, Y. Transition Metal-Mediated Polymerization of Isocyanides. Vol. 

As intuitively deduced, coordinating Y and Z must be removed or displaced in order for alkenes to coordinate and form an alkene tr-complex (Scheme 2). Since these intermediates, Cp 2MR(alkene), have never been observed in any detectable amounts for early transition metal-mediated polymerization, several chelate model systems have been devised (Figure 3). 

PPys synthesized by both oxidative routes are also subject to coupling defects, which drastically reduce sought after properties. To circumvent this problem, transition metal-mediated polymerizations have been explored. Once again, the synthetic inflexibility of the pyrrole moiety has proven to be a formidable obstacle in obtaining such materials. The Stille coupling scheme [12], shown in Scheme 60, has been used to prepare a BOC-substitued PPy 63 with the protecting group subsequently removed by thermolytic treatment to yield unsubstitut-... 

The -conjugated polyselenophene named PEDOS (182) the analog of poly-3,4-ethylenedioxythiophene (PEDOT) [281], one of the most successful conductive polymers, was obtained from 3,4-ethylenedioxyselenophene (89) using different polymerization techniques. These were oxidative chemical polymerization, solid-state polymerization, transition metal-mediated polymerization, and electrochemical polymerization (Scheme 46) [293, 294], The derivatives of PEDOS having the... 

This review focuses on the transition metal mediated polymerization of isocyanides and 1,2-diisocyanobenzenes. Other approaches, including acid-catalyzed polymerization and main-group metal mediated polymerization, are also included, but only if they are closely related to the above topic. 

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