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The kinetics of secondary reactions in the iodination of monogermane. The effect of iodine substitution on the GeH bond dissociation energy

โœ Scribed by Paul N. Noble; Robin Walsh

Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
353 KB
Volume
15
Category
Article
ISSN
0538-8066

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โœฆ Synopsis

A study has been made both of secondary reactions occurring during the reaction of 12 with GeH4, and of the direct reaction between 12 and GeH31. Both these studies show that the abstraction reaction I + GeH3I -GeHZI + HI occurs about 30 times faster than the reaction I + GeH4 -GeHe + HI in the temperature range of 425-446 K. This information is used to show that iodine substitution weakens Ge-H bonds by 14.4 f 2.5 kJ/mol and that D(H2IGe-H) = 332 f 10 kJ/mol (79.3 kcal/mol). Possible reasons for the effects of halogen substituents on Ge-H and Si-H bond strengths are discussed.

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