Answer to Question #233356 in Organic Chemistry for Razin

Question

1. Consider the compound 3(S),5,5-trimethylcyclohexene. Upon reduction with H 2

on a 1% Pt/C catalyst, draw the equation for this reaction, find out the absolute

configuration of the product and explain why the absolute configuration is completely

inverted in this reaction.

2. Give three dimensional representation for the orbitals used by the C’s in

a) H 2 C=CH + b) H 2 C=CH - and c) H 2 C=CH .

3.Write the factors those stabilizes free radicals.

4. How does regioselectivity and stereospecificity helps to determine the major

product formation in a chemical reaction?

Answer 1

Three Factors Which Influence The Stability of Free Radicals: Hybridization, Electronegativity, and Polarizability.

The key difference between regioselectivity and stereoselectivity is that regioselectivity refers to the formation of one positional isomer over another, whereas stereoselectivity refers to the formation of one stereoisomer over another.

Regioselective: Any process that favors bond formation at a particular atom over other possible atoms. The description of a reaction's regioselectivity (or the absence of regioselectivity) is called the reaction's regiochemistry.