Provide the reagents necessary to carry out the following conversion pt A or B W

Question

Provide the reagents necessary to carry out the following conversion pt A or B Which statement(s) are correct for IR spectrum of "Reduction of benzophenone" product after purification and drying the product: Strong peak~1700 appears Broad peak~3400 appears Strong peak~1700 disappears Broad peak~3400 disappears What is the purpose of using ice-water bath in reduction of benzophenone? To control the temperature of endothermic reaction between benzophenone and NaBH4 To control the temperature of exothermic reaction between benzophenone and NaBH4 To speed up the endothermic reaction between benzophenone and NaBH4

Explanation / Answer

13. B ( KMnO4 can also oxidise double bond in basic medium so mild oxidising agent like CrO3 can be used)

14. B and C ( Because the peak of carbonyl at apx 1700 disappears and a broad peak of alcohol at apx 3400 appears)

15. B (the reduction of any carbonyl compound by LiAlH4 or by NaBH4 isexothermic thats why ice-bath is used to control the temperature.

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