The product expected, along with its stereochemistry, from the addition of Cl 2 to 1,2-dimethylcyclohexane is to be given. Concept introduction: The reaction of halogens to alkenes occurs with anti stereochemistry, that is, the two halogen atoms come from opposite faces of the double bond- one from top face and other from bottom face. In the first step the addition of halogen to the double bond in the alkenes results in the formation of a cyclic halonium ion with the simultaneous elimination of a halide ion. The larger halonium ion shields one side of the molecule. Hence the attack of the halide ion occurs from the opposite, unshielded side to yield the trans - product. To give: The product expected, along with its stereochemistry, when Cl 2 is added to 1,2-dimethylcyclohexane.

Question

1) a) Give the dominant Intermolecular Force (IMF) in a sample of each of the following compounds. Please show your work. (8) SF2, CH,OH, C₂H₂ b) Based on your answers given above, list the compounds in order of their Boiling Point from low to high. (8)

Answer 1

Question

Chapter 8.2, Problem 3P

Interpretation Introduction

Interpretation:

The product expected, along with its stereochemistry, from the addition of Cl₂ to 1,2-dimethylcyclohexane is to be given.

Concept introduction:

The reaction of halogens to alkenes occurs with anti stereochemistry, that is, the two halogen atoms come from opposite faces of the double bond- one from top face and other from bottom face. In the first step the addition of halogen to the double bond in the alkenes results in the formation of a cyclic halonium ion with the simultaneous elimination of a halide ion. The larger halonium ion shields one side of the molecule. Hence the attack of the halide ion occurs from the opposite, unshielded side to yield the trans-product.

To give:

The product expected, along with its stereochemistry, when Cl₂ is added to 1,2-dimethylcyclohexane.

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