Draw the two constitutionally isomeric structures formed when iodobenzene and propene are subjected to the conditions of the Heck reaction. If stereoisomers are possible for a particular constitutional isomer, draw the more stable stereoisomer.

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Explanation:

The diagram to the question is in the attached image, and always remember that Constitutional isomers are compounds that have very similar molecular formula and diverse connectivity. To conclude whether two molecules are constitutional isomers, just calculate the figure or amount of every atom in both molecules and see how the atoms are assembled.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.