Note that COOC is shorthand for the ester linkage functional group O=C-O-C
(3) methyl propanoate (methyl propionate), , ,
An ester prepared from propanoic acid and methanol.
Number of low resolution NMR chemical shift δ signal peaks: 3 1H and 4 13C (email if disagree?)
1H NMR ratio of peaks: 3 : 2 : 3 (for equivalent protons)
(4) ethyl ethanoate (ethyl acetate), , , ,
An ester prepared from ethanoic acid and ethanol.
Number of low resolution NMR chemical shift δ signal peaks: 3 1H and 4 13C (email if disagree?)
1H NMR ratio of peaks: 3 : 2 : 3 (for equivalent protons)
(5) propyl methanoate (propyl formate), abbreviated structural formulae
structural formula , skeletal formula
An ester prepared from methanoic acid and propan-1-ol.
Number of low resolution NMR chemical shift δ signal peaks: 3 1H and 4 13C (email if disagree?)
1H NMR ratio of peaks: 1 : 2 : 2 : 3 (for equivalent protons)
(6) 1-methylethyl methanoate (isopropyl formate, isopropyl methanoate) HCOOCH(CH3)2
An ester prepared from methanoic acid formic acid) and propan-2-ol (isopropyl alcohol).
Number of low resolution NMR chemical shift δ signal peaks: 3 1H and 3 13C (email if disagree?)
1H NMR ratio of peaks: 1 : 1 : 6 (3+3) (for equivalent protons)
Esters are functional group isomers of carboxylic acids.
Sub-index for isomers of formula C4H8O2
Spectra links for isomers (1) to (6) which can be used to identify a specific isomer
The infrared spectrum of butanoic acid (butyric acid)
The infrared spectrum of 2-methylpropanic acid (isobutyric acid)
The infrared spectrum of methyl propanoate (methyl propionate)
The infrared spectrum of Ethyl ethanoate (ethyl acetate)
The infrared spectrum of propyl methanoate (propyl formate)
The infrared spectrum of 1-methylethyl methanoate, (propan-2-yl methanoate) (isopropyl formate)
The mass spectrum of butanoic acid (butyric acid)
The mass spectrum of 2-methylpropanic acid (isobutyric acid)
The mass spectrum of methyl propanoate (methyl propionate)
The mass spectrum of Ethyl ethanoate (ethyl acetate)
The mass spectrum of propyl methanoate (propyl formate)
The mass spectrum of 1-methylethyl methanoate, (propan-2-yl methanoate) (isopropyl formate)
The H-1 NMR spectrum of butanoic acid (butyric acid)
The H-1 NMR spectrum of 2-methylpropanic acid (isobutyric acid)
The H-1 NMR spectrum of methyl propanoate (methyl propionate)
The H-1 NMR spectrum of Ethyl ethanoate (ethyl acetate)
The H-1 NMR spectrum of propyl methanoate (propyl formate)
The H-1 NMR spectrum of 1-methylethyl methanoate, (propan-2-yl methanoate) (isopropyl formate)
C-13 NMR spectrum of butanoic acid (butyric acid)
The C-13 NMR spectrum of 2-methylpropanic acid (isobutyric acid)
The C-13 NMR spectrum of methyl propanoate (methyl propionate)
The C-13 NMR spectrum of Ethyl ethanoate (ethyl acetate)
The C-13 NMR spectrum of propyl methanoate (propyl formate)
C-13 NMR spectrum of 1-methylethyl methanoate, (propan-2-yl methanoate) (isopropyl formate)
Sub-index for isomers of formula C4H8O2
(e-g) For examples (e) onwards, you are more likely to come across them at university level, but the odd structure may crop up in advanced pre-university chemistry courses.
There are also lots of hydroxy-aldehydes and hydroxy-ketones with a C4H8O2 molecular formula
