1. If the infrared spectrum of your compound has peaks at 1750 cm (strong, sharp

Question

1. If the infrared spectrum of your compound has peaks at 1750 cm (strong, sharp), and 1220 cm (strong), and no broad peak at 3000-3500 cm', you would suspect that it contains: a. an ester b. a carboxylic acid c. a ketone d. an aldehyde 2. If the 'H NMR spectrum of your compound has signals in the 7-8 ppm region, you would suspect that it contains: a. all single bonds b. a double bond c. a triple bond d. an aromatic ring (like benzene) 3. Which of the following Syl reactions did the Spartan program predict to have the lowest energy (AHn, kcal/mol)? a. CH:CH2CH CH CI CH&CH; CH CH2+Cr c. (CH3)scci (CH3)3C" + Cl. 4. Which of the following compounds corresponds best to the IR spectrum? 1100 wavenumber cm1 a. A b. B c. C d. D

Explanation / Answer

Ques 1

Option (A) ester, its gives C=O at 1750 and C-O at 1220

Ques 2

An aromatic ring will give that much coupling constant

Ques 3

tertiary compound has the lowest energyso ,option (C) is correct.

Ques 4

Option (A) is correct as spectra contains broad peak at 3300 corresponds to -OH

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