Final Exam-Summer 2018 What is the correct classification of the following react

Question

Final Exam-Summer 2018 What is the correct classification of the following reaction H2C CH2 A. Substitution reaction B. Oxidation reaction C. Reduction reaction D. Elimination reaction E. Neither 38. Examine the IR below and classify the compound C) Amine D) Alcohol E) Kctone A) Alcobol B) Aldehyde An alkyne C-H bond absorbs at higher wave number than an alkene C-H bond. What does this tell you about the strength of these two bonds? 39. A. The alkene C-H bond is stronger B. The alkyne C-C bond is stronger. C. The alkene C-C bond is stronger D. The alkyne C-H bond is stronger. E. The alkyne C-H bond is stronger. 10

Explanation / Answer

1:epoxide can be formed by alkene with the addition of oxygen (oxidation reaction) .Addition of oxygen can also be done by reacting with peracids which is electrophilic addition reaction.

on the other hand substitution reaction is when one group is replaced by another.elimination reaction in which one or more groups are eliminated.here no elimination takes place as there is addition of oxygen taking place.

2;spectrum shows a broad peak at around 3600cm-1 shows the O-H peak which is broad due to hydrogen bond between two O-H group .so the compound would be alcohol.

3;alkyne C-H absorbs at higher frequency than alkene C-H bond depicts that alkyne C-H bond is stronger than alkene C-H as frequency is directly proportional to bond constant K.

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