13. Why it is important that any aldehyde used in Witting reaction be free of
carboxylic acid impurities?
14. Explain why the C=C stretching mode gives rise to a rather weak IR band
in 1-methylcyclohexane, while in its isomer, methylenecyclohexene, the
band is of medium to strong intensity.
15. Predict the major organic product formed in the following reaction:
CH3CHzNOz + CHzO ~