ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Measurement of the infrared absorption spectrum of the lowmolecular liquid polymer formed at room temperature from gaseous isobutene using BF3 as a catalyst and D2O as a cocatalyst indicates that the dominant end groups in the final polymer are (CH3)3C and , and that the cocatalyst D2O undergoes partial conversation to H2O during reaction. These results substantiate the mechanism advanced by Polanyi and others, namely: (a) initiation through formation of the trimethyl carbonium ion by acceptance by isobutene of a proton (or deuteron) from the catalyst-cocatalyst complex, and (b) termination by explusion of a proton from a methyl group to the anionic complex fragment, with corresponding catalyst regeneration, i.e.:
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1949.120040103
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