What are possibilities for the occurrence of isomerism in #"2-butylene"#, #"lactic acid"#, #"acetone"#, and #"2,3-dichloro-2-butene"#...?

1 Answer
anor277
Nov 21, 2017

#(i)# For #"2-butene"#, you have the possibility of geometric isomerism, i.e. #"cis/trans isomerism"#.....

Explanation:

#(ii)# #H_3C-stackrel("*")CH(OH)CO_2H# will generate a pair of optical isomers around the starred carbon....

#(iii)# #"Acetone"# does not generate any geometric isomers; it can engage in keto-enol tautomerism, but the enol and the ketone are not isomeric.

#(iv)# #H_3C(Cl)C=C(Cl)CH_3# will also give a pair of #"cis/trans isomers"#....

You should draw all of the isomers out in order to appreciate the difference in geometry.

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