ISSN:
0899-0042
Keywords:
conformational analysis
;
nonbonded interactions
;
metallocene/methylalumoxane systems
;
1-pentene
;
styrene
;
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The enantioselectivity found in homogeneous isospecific Ziegler-Natta catalysts for the insertion of 1-alkenes in metal-deuterium or in metalisobutyl bonds is discussed from a theoretical point of view. Nonbonded energy calculations, based on a model of the catalytic site previously proposed by us, indicate that the strong enantioselectivity found in the insertion of 1-alkenes in a metal-isobutyl bond is drastically reduced in the presence of a metal-deuterium bond. In particular, a weak enantioselectivity in favour of a monomer coordinated with the opposite chirality (lower for the case of 1-butene, higher for the case of styrene) is shown to occur in the latter case.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/chir.530030414
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