13C nuclear magnetic resonance studies of the adducts of bis-(π-crotyl-D7-nickel iodide) and 2-alkylbutadienes as related to mechanism of polymerization
✍ Scribed by N.N. Druz; M.I. Lobach; A.S. Khatchaturov; V.I. Klepikova; V.A. Kormer
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 267 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0014-3057
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✦ Synopsis
By 13C NMR spectroscopy, the structures of (C4DTNil)2 adducts with isoprene, 2-ethyl-, 2-isopropyl-and 2-tert. butylbutadienes have been investigated. The nature of the 2-alkyl substituent in the anti-and syn-l.2-disubstituted rc-allylic complexes influences the character of electron charge densities distribution on the carbon atoms of a 7t-allylic ligand. Mutual arrangement of substituents in the n-altylic active sites has been shown to remain in the double bonds of elementary units of a polymer chain. * Synthesized in the presence of (C4HTNiI)2; % Synthesized under influence of TiCI4 + AI(C2Hs)a catalytic system.