metathesis polymerization reactions induced by the bimetallic complex (ph4p)2[w2(μ-br)3br6]
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2015
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Abstract
The reactivity of the bimetallic complex (Ph4P)2[W2(μ-Br)3Br6] ({W 2.5 W}7+, a′2e3) towards ring opening metathesis polymerization (ROMP) of norbornene (NBE) and some of its derivatives, as well as the mechanistically related metathesis polymerization of phenylacetylene (PA), is presented. Our results show that addition of a silver salt (AgBF4) is necessary for the activation of the ditungsten complex. Polymerization of PA proceeds smoothly in tetrahydrofuran (THF) producing polyphenylacetylene (PPA) in high yields. On the other hand, the ROMP of NBE and its derivatives is more efficient in CH2Cl2, providing high yields of polymers. 13C Cross Polarization Magic Angle Spinning (CPMAS) spectra of insoluble polynorbornadiene (PNBD) and polydicyclopentadiene (PDCPD) revealed the operation of two mechanisms (metathetic and radical) for cross-linking, with the metathesis pathway prevailing.
| Reference Key |
chriti2015polymersmetathesis
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| Authors | ;Despoina Chriti;Alexios Grigoropoulos;Grigorios Raptopoulos;Georgios Charalambidis;Vasilis Nikolaou;Athanassios G. Coutsolelos;Marinos Pitsikalis;Konstantinos Mertis;Patrina Paraskevopoulou |
| Journal | Journal of Fluorescence |
| Year | 2015 |
| DOI |
10.3390/polym7121536
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| URL | |
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