Which feature in the^1H NMR spectrum provides information about the number of ty

Question

Which feature in the^1H NMR spectrum provides information about the number of types of different protons in a compound? number of signals integral splitting chemical shift Which feature in the^1 H NMR spectrum provides information about the relative number of each type of proton in a compound? number of signals integral splitting chemical shift Which feature in the^1H NMR spectrum provides information about the electronic environment of the protons in a compound? number of signals integral splitting chemical shift Which feature in the^1H NMR spectrum provides information about the number of neighboring protons of each proton in the compound ? number of signals integral multiplicity chemical shift Which of the following combinations of peaks appears in the^1H NMR spectrum of 1, 4-dimethyoxyethane. CH_3OCH_2CH_2CH_2CH_2OCH? three singlets a singlet, a triplet, and a quintet a singlet and two triplets a doublet and a triplet Which of the following compounds gives a^1H NMR spectrum consisting of only a singlet 1, 1-dibromopropane 1, 2-dibromopropane 1, 3-dibromopropane 2.2-dibromopropane

Explanation / Answer

21. number of type of diffrent proton in compoude,

Ans - a) number of signals

explanation - same type of proton give one signal and diffrent type of proton give diffrent signal.

22.) Relative number of each type of proton

Ans - b) integral

Explanation - area under peak give information about no. of proton prsent in given peak.

23) electonic environment of proton

Ans - d) chemical shift

Explanation - proton have diffrent chemical envoronment give diffrent singal and those proton have same envoronment give one signal.

24) no. of nabouring proton

ans - c) multiplicity

explanation - multiplicity of peak give inforrmation of how many proton present on nabouring carbon.

if singlet - 0 proton on naboring carbon

if soublet - 1 proton on naboring carbon

if triplet - 2 proton on naboring carbon

if quartet - 3 proton on naboring carbon etc

25) Ans - a) three signal

Explanation - - CH3 of both end give 1 signal

both - CH2 which attached to O atom and CH3 give 1 signal

Both remained -CH2 are equivalent give 1 signal

26) Ans - 2,2-dibromopropane

explanation - 2,2-dibromopropane give only one peak for 6 hydrogen for no.1 -CH3 and no. 3 - CH3 and it is singlet because no. 2 carbon have not any proton.

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