The Kinetics of the Reaction of Bis(Pentamethylcyclopentadienyl)-Methylscandocene With Benzene (D=6)
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Authors
Mohammadi, Reza
Issue Date
1984
Type
Thesis
Language
en_US
Keywords
Alternative Title
The Kinetics of the Reaction of Bis(Pentamethylcyclopentadienyl)-Methylscandocene With Benzene
Abstract
The deuterium isotope effect on the observed rate of the reaction of bis(pentamethylcyclopentadienyl)methylscandocene with
benzene, C6H6, supports a four-center, [2s-2s], transition state.
In addition, the Fourier transform deuterium NMR as well as H-NMR
indicate the formation of a tuck-in intermediate. The free energy changes of activations for the transition
states in the rate-determining steps of these two competing
path-ways, at different temperatures, suggest that the
four-center transition state, having a higher entropy of
activation than that of the transition state which leads to the
formation of the tuck-in intermediate, is favored at low
temperatures. However, at high temperatures both path-ways are
followed equally. This observation is further supported by the
relative percentages of the formation of methane D=l and methane
D=O, at different temperatures.
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Description
vii, 76 p.
Citation
Publisher
Kalamazoo College
License
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