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Titolo:
NOVEL POLYMERIZATIONS OF GERMYLENES AND THEIR REACTION-MECHANISMS
Autore:
KOBAYASHI S; SHODA SI; IWATA S; HIRAISHI M; CAO S;
Indirizzi:
TOHOKU UNIV,FAC ENGN,DEPT MOLEC CHEM & ENGN SENDAI MIYAGI 980 JAPAN
Titolo Testata:
Macromolecular symposia
, volume: 98, anno: 1995,
pagine: 91 - 100
SICI:
1022-1360(1995)98:<91:NPOGAT>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLY(GERMANIUM ENOLATE); COPOLYMERIZATION; POLYMER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
S. Kobayashi et al., "NOVEL POLYMERIZATIONS OF GERMYLENES AND THEIR REACTION-MECHANISMS", Macromolecular symposia, 98, 1995, pp. 91-100

Abstract

Novel copolymerizations for the synthesis of germanium-containing polymers using a divalent germanium species, germylene, have been developed. The copolymerization involves a redox process between a germylene (M(red)) and an oxidant monomer (M(ox)) such as p-benzoquinones, cyclic alpha,beta-unsaturated ketones, and substituted acetylenes. A new germanium-containing polymer having a germanium-sulfur bond unit in the main chain has been synthesized by the oxidative addition of a poly(dithioalkylene) toward the germylene. A ligand exchange polymerization has been developed as a new polymerization reaction affording a polygermane. The reaction mechanism of the copolymerization between germyleneand p-benzoquinone derivatives has definitely been established as a biradical polymerization system involving a germyl radical and a semiquinone radical, providing the first clear-cut evidence for a biradical mechanism in the polymerization chemistry.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/08/20 alle ore 14:39:47