Chemical Forums
Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: jena on February 07, 2005, 11:48:59 AM
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Hi,
I understand how to set up the problem, but I'm having problem getting the enthalpy.
The question reads:
What is the enthalpy difference (within 1kcal/mole) for the second propagation step of the reaction of isoheptane, bromine and light going to the major product of this reaction?
My setup
Initiation: Br-Br----> Br2
Propagation 1: (CH3)2CHCH2CH2CH3+ Br ----> (CH3)2CHCH2CH2CH2+ HBr
Propagation 2: (CH3)2CHCH2CH2CH2+ Br-Br --->(CH3)2CHCH2CH2CH2Br + Br
So how do I do the bond dissocations for bonds that are greater than the regular ethane bonds that they give in our textbooks. ???
Thank you :)