Regioselective, Stereoselective, and Stereospecific Reactions

Rank the following compounds in order from most stable to least stable trans-3-hsxsns, cis-3-hexene, cM-2,5-dimethyl-3-hexene, cw-3,4-dimethyl-3-hexene 

When we looked at the electrophilic addition reactions that aUcenes undergo, we examined the step-by-step process by which each reaction occurs (the mechanism of the reaction), and we determined what products are formed. However, we did not consider the stereochemistry of the reactions. 

Stereochemistry is the field of chemistry that deals with the structures of molecules in three dimensions. When we study the stereochemistry of a reaction, we are concerned with the following questions  

If the product of a reaction can exist as two or more stereoisomers, does the reaction produce a single stereoisomer, a set of particular stereoisomers, or all possible 

If the reactant can exist as two or more stereoisomers, do all stereoisomers of the reactant form the same stereoisomers of the product, or does each stereoisomer of the reactant form a different stereoisomer or set of stereoisomers of the product  

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Stereochemistry of Reactions Regioselective, Stereoselective, and Stereospecific Reactions... 

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