Accession Number : AD0698919

Title :   EXCHANGE REACTIONS BETWEEN LITHIUM ALKYL AND ALKENYL AGGREGATES IN HYDROCARBON SOLUTION,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF APPLIED CHEMISTRY

Personal Author(s) : Schue,F. ; Bywater,S.

Report Date : 09 JUN 1969

Pagination or Media Count : 4

Abstract : The 7Li nmr spectra of a number of lithium alkyls(n-, sec-, and t-butyl) together with lithiomethyltrimethylsilane and oligomeric polyisoprenyllithium have been measured alone and in binary mixtures in cyclopentane. All the systems showed rapid mixing of the aggregated species at room temperature if t-butyllithium was not one of the components. The systems containing t-butyllithium behaved differently. Slow mixing of t-butyllithium over a period of hours was observed with both sec-butyllithium and lithiotrimethylsilane but with polyisoprenyllithium partial exchange occurred in at most a few minutes but did not proceed further. The implications of these experiments for polymerization studies is discussed. (Author)

Descriptors :   (*LITHIUM COMPOUNDS, *NUCLEAR MAGNETIC RESONANCE), SOLUTIONS(MIXTURES), METALORGANIC COMPOUNDS, EXCHANGE REACTIONS, CANADA

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE