Please answer me with good quality!!!!!!!! All details And Mechnism if it\'s org
ID: 593550 • Letter: P
Question
Please answer me with good quality!!!!!!!!
All details
And
Mechnism if it's organic chemistry!!
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(5) The rate of reaction depends on the relative nucleophilicity of the nucleophile. () : 3504 3603 7 6 -it.[1 Af (c) Which of the following functional groups will exhibit no IR absorption at 1630 1780 cm or at 3200 3550 cm? (1) an alcohol (4) an aldehyde (2) an amide (5) an este (3) a ketone (d) Which of the following solvents could be described as polar and protic? (3) dimethylformamide (DMF) (1) ethanol (4) acetone (2) acetonitrile (5) 18-crown-6 (e) Lithium aluminum hydride reduces carboxylic acid to primary alcohols via what intermediates? (3) an aldehyde (1) a ketone (4) a secondary alcohol (2) a methyl ester (5) an acid chloride (1) In order of decreasing reactivity, how would the bromides below rank in the following reaction? CH CH OFH R-X Br (2) D> B>A>C (5) C>D>B>A (3)A>C>D>B (4) D>A>c>B (g) When 1,3-cyclopentadiene reacts with the cis-isomer of NCCH-CHCN, the major product is (2) a meso compound. (3) a racemic mixture. (1) optically active. (4) a spirocyclic compound. 5) a fused bicyclic compound. Ch) Which of the following alcohols will react most rapidly with the Lucas reagent? (3) CH,CH(OH)CH CH (1) (CHs)COH (4) (CH3) CHCH OH (2) CH CH CH CH OH (5) (CHshCHCH OH)CHs (i) Why do acetal-forming reactions that use ethylene glycol have more favorable equilibrium constants tha those using methanol? (1) ethylene glycol reacts more rapidlyExplanation / Answer
(c)Ans. The functional group which shows IR absorption between 3500 cm-1 and 3550 cm-1 and not between 1630 cm-1 to 1780 cm-1 is alcohol.
The functional group which shows IR absorption between 1630 cm-1 to 1780 cm-1 and not between 3500 cm-1 and 3550 cm-1 are amide, ketone, aldehyde and ester.
The IR stretching frequencies of each functional group is given below.
(1) Alcohol: An alcohol will show a strong intensity OH stretch between 3600 cm-1 to 3200 cm-1.
(2) Amide: In amides, the C=O stretching absorption is observed 1700 cm-1 to 1500 cm-1.
(3) Ketones: In ketones the C=O stretching absorption is between 1745 cm-1 to 1715 cm-1.
(4) Aldehyde: In aldehydes, a strong C=O stretching is observed between 1740 cm-1 to 1720 cm-1.
(5) Ester: In esters, there is a strong C=O stretch between 1750 cm-1 to 1720 cm-1.
(d)Ans. Among the solvents given in the question, the only solvent that is both polar and protic is (1) ethanol.
Explanation on what type of solvent they belong to is given below;
(1) Ethanol: Ethanol has OH group, which is polar due to the presence of highly electronegative atom O. It is also a protic solvent since it has a H attached to electronegative atom O.
(2) Acetonitrile: Acetonitrile is a polar aprotic solvent.
The formula of acetonitrile is CH3-CN. It is polar due to the presence of triple bonded CN group which is polar and aprotic due to no H attached to O or N.
(3) DMF: DMF is a polar aprotic solvent. It is polar due to the C=O group but an aprotic solvent due to the absence of H attached to highly electronegative atoms O or N.
(4) Acetone: Acetone is a polar aprotic solvent. It is polar due to the carbonyl group and it is aprotic due to no H attached to the O in acetone.
(5) 18-crown-6: 18-crown 6 may be slightly polar/nonpolar and aprotic. It is aprotic due to no H directly attached to the O in acetone.