Question

IR WORKSHEET SPECTROSCOPY TABLES Table E-1. Molecular vibrations and absorption frequencies in the i ntrared region. Boad Type Streiching. cm Beadingcm Bond Type Streiching.cm 1725-17000 Bending.cn C-Halkanes C-H alkenes C-H aromatic 60250 1470-130O ( 3080-3020 ()1000-675 (0) 3100-3000870-675 2900, 2700 (m, 2 bands) C-O acd c-c) amide O-H aleohols (not 1680-1630 () 3 3650-3590 () C-H aldehyde O-H alcohols C-Halkyne C-Calkyne CN nitrile C-Calkene C-C aromatic 3300 (0 2260-2100 () bonded) 3000-2500 1655-15106) O-H acids N-H amines N-H amides C-O alcohols ethers, esters 500-3300 (m) 1600-1430 (v) 1725-1705 ( 1730-1720 (0 1685-166G (s) C-C) ketone 1300-1000() C-O akdehyde c-oa,ßunsat. -Namines, alky1220-1 1020 () | C-N amines aromatic urated ketone 1360-1230 () 1700-1680 () 1750-1740 () C-O aryl ketone 1560-1515() 1385-1345() No, nitro C-O ester s- strong absorption W- weak absorption mmedium absorption varable absorpion Table E-2. Other double bonds. Notes w cm Chromophore as0-16801 노-0./ |Alene blebodabsorplion isvery weak when sandal (C The double bond absorption is very weak when symmetrically substituted,but is more intense when terminal. It becomes intense and at relatively smaller wave number in conjugated cases, more so when conjugated with ketones than with (vc-c) other double bonds. Tetrasubstituted double bonds often do not show Aromatics A series of peaks of variable intensity used principally as a fingerprint 1400-1600 1 !imines and oximes 冫C-N- (C N) Intensity is usually weak and not much allected by copjugation. 1590- 1690

Answer 1

The first spectrum has a broad peak close to 3300, which represents an O-H bond of alchol, according to the empirical formula we can determine that its molecular formula is: C6H11OH, a cyclohexanol.

The second spectrum, has wide peak about 3300, which corresponds to an alcohol and also has a peak in 1727, which represents a ketone, according to the empirical formula, we can determine the structure of the compound: