In following molecules which one has the shortest C-C bond length?
Correct answer: D. C2H2
- A. C3H8
- B. C2H6
- C. C2H4
- D. C2H2
Explanation
The bond lengths in the given molecules are:- C3H8 (propane): 1.54 Å (single bond)- C2H6 (ethane): 1.53 Å (single bond)- C2H4 (ethylene): 1.33 Å (double bond)- C2H2 (acetylene): 1.20 Å (triple bond)The shortest C-C bond length is found in acetylene (C2H2), which has a triple bond between the two carbon atoms. This is because triple bonds are shorter than double bonds, which are shorter than single bonds.
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Hydrocarbons are studied through the structures and reactions of alkanes, alkenes, alkynes and aromatic compounds. Coverage includes free radical substitution in alkanes, electrophilic addition to carbon-carbon multiple bonds, benzene substitution, aromatic stability and the difference between addition reactions of alkenes and substitution reactions of benzene.
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