Asked by kayla magness on Apr 23, 2024

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The hydrogen atom abstraction step in the free radical chlorine of methane is exothermic. Use the Hammond Postulate to speculate on the extent of bond formation and bond cleavage in the transition state.

Hammond Postulate

A principle stating that the transition state of a chemical reaction resembles the structure of the closest stable species: the reactants for endothermic steps and the products for exothermic steps.

Free Radical Chlorine

A highly reactive species of chlorine that carries an unpaired electron, often involved in radical reactions.

Methane

A simple hydrocarbon with the formula CH4, representing the simplest alkane and a primary component of natural gas.

  • Comprehend the Hammond Postulate and its utilization in forecasting the pathways of reactions and the states of transition.
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Natalie SmallsMay 02, 2024
Final Answer :
The exothermic nature of this step means that the energy of the transition state is closer to that of the step's reactants than to its products. Using the Hammond Postulate this means the transition state more closely resembles a chlorine radical than a carbon radical. The carbon-hydrogen bond has broken very little and the hydrogen-chlorine bond has formed very little in the transition state.