A component with molecular formula C_ H_ O_2shows the following spectral data: ^

Question

A component with molecular formula C_ H_ O_2shows the following spectral data: ^1 H NMR: 1.2(3H, t), 2.1 (2H, q) 3.6 (3H, ) IR: 1730 cm^-4 possible structure is: A compound with molecular formula C_2H_10O_2, shows two strong peaks at 1715 and 3450 cm^-1 in the IR spectrum. Possible structure of this compound is: Multiplicity (splitting) of the circled proton in ^1 H NMR spectrum of (A) q (B) t (C) d (D) s (E) (7 line) Doubling both the nucleophile concentration and RX concentration in a S_N1 reaction would (A) Double the reaction rate (B) the product concentration (C) Double the reaction time (D) have no effect on the reaction rate (E) quadruple the reaction rate The product in the S_N 2 reaction of S-2 bromohexane with aqueous sodium hydroxide is: (A) R-2-hexanol (B) S-2-hexanol (C) racemic mixture of 2 hexanols (D) E-2-hexene (E) z-2-hexene Intermediates in reaction mechanisms are shown with (A) partial bonds and + or - charges (B) partial bonds and + or - charges (C) full bonds and + or - charges (D) full bonds and sigma + or sigma - charges (E) (E) partial bonds with no charges ..groups/atoms are attached to the central carbon atom in the transition state of S_N 2 reaction, and gives a product with geometry (A) Three, inverted (B) Three, retained (C) Five, inverted (D) Five, retained (E) Five, inverted The most non-polar solvent in the group is: (A) hexane (B) water (C) ethanol (D) chloroform (E) diethyl ether Number of ^1 H and ^13 C NMR peaks expected for (A) 3 and 3 (b) 2 and 2 (C) 1 and 1 (D) 2 and 3 (E) 3 and 5 Number of peaks and area ratios in the ^1 H NMR spectrum of 3,5 dichlorobenzaldehyde (A) 3 peaks, 1:2:3 (B) 3 peaks, 2:2:3 (C) 3 peaks, 12:1 (D) 2 peaks, 1:2 (E) 2 peaks, 1:1 Total number of peaks in the ^13 C NMR spectrum of 2,6-dimethylhetene is: (A) 2 (B) 3 (C) 4 (D) 5 (E) 6 Major peaks in the mass spectrum of n-butane are m/z: (C = 12, H = 1) (A) 15, 29, 43, (B) 15,29,44,58 (C) 15, 30, 43, 58 (D) 15, 29, 43, 58 (E) 15, 29, 44 Total number of peaks in the ^13 C NMR spectrum of 2,3-dimethyl, 2-butene is: (A) 1 (B) 2 (C) 3 (D) 4 (E) 5

Explanation / Answer

Answer-

1) a 1730 cm-1= ester,

2) a The IR stretching frequency at 1717 cm-1 comfims the presence of -C=O stretching and 3450 cm-1 shows

-O-H stretching of acid.

3) B) t The circled proton shows triplet.

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