The following compound has a molecular formula of C5H10O and the indicated 13C spectrum. A proton NMR was measured, but the data was lost except for the fact that it showed three distinct signals: a singlet, a doublet, and a septet, all of which appear between 0 and 3 ppm. Identify the compound, and draw its expected 1H NMR.

C,HBrO2, The strong peak at 1750 cm The molecular formula of an unknown compound is The proton NMR data is, 1.2d(6H, d), 4.2d(1H, t), 2.2d(2H, quintet), 4.93d(1H, septet), 1.08d(3H, t). What is the name of the unknown compound? ethyl 2-bromo-3-methylbutanoate 1-bromopropyl isobutyrate 1-bromoethyl 3-methylbutanoate Isopropyl 2-bromobutanoate

A student prepares a compound that she believes has the molecular formula C4H1002. Give a possible structure for this compound using the information from the following spectra. How many peaks will your proposed structure give in the 13C NMR? 1Η NMR singlet 3.25 (3 H) singlet 3.45 (2 H) IR nothing at 3500 cm-1 nothing at 1700 cm-1

Pl explain too

How many different 13C-absorption lines and how many 'H- resonances (disregard splitting and assume that solvent exchange of acidic hydrogens does NOT take place) are observed in the spectrum of each of the following compounds? (H3C)3C-C(CH3)2 CI A H3C (H3C)3C B CH3 CH3 H₂C= -COOH C CH-CI H3C-C-CH Cl Br D

Draw the organic structure of the compound and mark its peaks on the spectra

Deduce the structure of compound C.

Which of these choices best describes the interpretation of the following peak that may be recorded in a 'H NMR spectrum? 2.5 8 (2H, d). The underlined hydrogen atom is intended to be the one producing the peak that we are interpreting. O=C-CH,CO2H O=C-CH2CHX2 O=C-CH2CH2X O=C-CH2CH3 None of these interpretations describes this peak.