ORGANIC CHEMISTRY
ORGANIC CHEMISTRY
6th Edition
ISBN: 9781266633973
Author: SMITH
Publisher: MCG
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Chapter 25.3, Problem 8P
Interpretation Introduction

Interpretation: The structure of provitamin D3 is to be drawn.

Concept introduction: Electrocyclic reactions involve the conversion of σ bonds into π bonds or π bonds into σ bonds. These reactions can take place in photochemical and as well as thermal conditions. The photochemical and thermal reactions take place in the presence of light and heat respectively.

Curved arrows aid in determining the movement and flow of electrons in the reaction. The electrons that take part in the chemical reactions are shown by the curved arrows.

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Give good solution Na2SO4(aq)+C(s)+NaOH(aq)→Na2CO3(aq)+Na2S(aq)+H2O(l). Identify the oxidant and the reductant. is the reductant; is oxidized from 0 → +4. is the oxidant; is reduced from +6 → –2.
Compound P was discovered by a scientist. She discovered that P is a tripeptide that is optically active and has the molecular formula C21H25N3O5. As a part of the validation process, she tested compound P on different scientific tests. When compound P is reacted with sodium hydroxide its produced salt Q, C21H25N3NAO5 as a major product. Compound P also reacted with sodium bicarbonate to produced salt R as a major product and two side products. Both salts have a similar molecular formula. The reaction of compound P with thionyl chloride produced compound S, C21H23Cl½N3O3. Compound T is formed when compound P reacted with alcohol U, C4H100. Identify the possible structural formulae for compounds P, Q, R, S, and T. Label all peptide bonds for compound P. Predict one (1) of the possible structural formulae of amino acid obtained from compound P. How would you distinguish between compound S and compound T?
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