mechnism detail if u can\'t don\'t reply it\'s abuse !all LINE- ? LIN :() ():(22

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mechnism detail if u can't don't reply it's abuse !all

LINE- ? LIN :() ():(2204) 5 ,4 * 4. Rank cach of the following sets of molecules in order of increasing SN2 reactivity (9%) [A] CH3CH2C, CHCH2l, Ci 5. How could you distinguish between the compounds in each of the following pairs using UV spectroscopy? (996) and and and -OCH3 6. When compound A (CsH20) is treated with HBr, it forms compound B (CsHnBr). The H NMR spectrum of compound A has one singlet (1), two doublets (3, 6), and two multiplets (both 1) (number in parentheses are the relative areas of the signals). The 'H NMR spectrum of compound B has a singlet (6), a triplet (3), and a quarter (2). Please identify compounds A and B. (896) 7. Using any necessary inorganic reagents, show how you would convert acetylene and isobutyl bromide to the following compounds. (6%) [A] meso-2,7-dimethyl-4,5-octanediol, (CH3hCHCH CHOH)CH(OH)CH CH(CHsh [B])-2,7-dimethyl-4,5-octanediol

Explanation / Answer

4.

Less the steric hindrance high the reactivity in SN2 mechanism. Among halogens leaving ability, F-<CL-<Br-<I-

[A] Chlorocyclhexane < CH3CH2Cl < CH3CH2I

[B] (CH3)2CHBr < CH3CH2CH2Br < CH3CH2Br < CH3Br

[C] CH3CH2CH2CH(Br)CH3 < (CH3CH2)2CHCH2Br < (CH3)2CHCH2Br

5.

Extension of conjugation shifts the absorption maxima towards higher wave lengths.

[A] (i) has lower absorption maxima than (ii)

[B] (i) has lower absorption maxima than (ii)

[C] (i) has high absorption maxima than (ii)

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