91Ó°ÊÓ

The protons which are attached to some kind of atoms in its surrounding show a single signal.

The protons which are closely attached to hetero atoms show a higher chemical shift then a normal chain proton.

The protons of a functional group or nearby a functional group also show the different chemical shifts.

a. Proponal –proponal has three sets of equivalent protons a stands for the three protons of the methyl group, b stands for the two protons of the methylene group and c stands for one proton attached to the carbonyl group.

b. 2-Oxomethyl-butane – it has five stets of equivalent protons and three protons of methyl group labeled as a.

b stands for 3 protons of methyl group near to oxo-methyl group. C stands for two methylene protons and d for three protons of the oxo-methyl group. E for one proton of second carbon.

c. 1,3-dichloropropane - it has two sets of protons 4 protons near both chloro group and two protons at middle carbon.

d. 3-oxomethyl-pentane – it has four sets of protons. Six protons of both terminals carbon, four protons of second to terminal carbon on both sides. C stand for three carbon oxo-methyl group and d for one-carbon third carbon.

e. Butylmethanoate – it has four sets of identical photons. All carbons have different kinds of protons.

f. 2- methylethoxypropane – because of the unsymmetric structure all carbons have different types of compounds. It has six sets of protons

g. 2-pentanone – it has four set of protons .every carbon is in a different environment because the ketone group is present in the second position.

h. 3- methylmethoxy propane – it has five sets of protons. All carbon has a different kinds of protons.

i. 2-chloro-3-methyl-butane – it has four sets of protons. 2 methyl groups attached to the third carbon are the same else are different.