What multiplicities are observed for the signals in the off-resonance decoupled 13C NMR spectrum of 1-bromo-2,3-dichlorocyclopropene?Select answer from the options belowa singlet and 2 doubletsa singlet, a doublet and a tripleta singlet, a triplet, and a quartet3 singlets2 singlets and a doublet
Question
What multiplicities are observed for the signals in the off-resonance decoupled 13C NMR spectrum of 1-bromo-2,3-dichlorocyclopropene?Select answer from the options belowa singlet and 2 doubletsa singlet, a doublet and a tripleta singlet, a triplet, and a quartet3 singlets2 singlets and a doublet
Solution
The compound 1-bromo-2,3-dichlorocyclopropene has three distinct carbon environments, so we would expect to see three signals in the 13C NMR spectrum.
- The carbon attached to the bromine atom is unique and will give a singlet.
- The carbon attached to two chlorine atoms is also unique and will give another singlet.
- The carbon in between these two carbons is attached to two different types of carbons, so it will split into a doublet due to the n+1 rule (where n is the number of neighboring carbons).
So, the correct answer is "2 singlets and a doublet".
Similar Questions
What is the meaning of a triplet in a 13C NMR spectrum which is obtained by a technique called off-resonance decoupling?Select answer from the options belowCH3 (Carbon with three H attached to it) C (with no H attached to it)CH (Carbon with one H attached to it)CH2 (Carbon with two H attached to it)
Which of the following compounds exhibits three signals in its 13C NMR spectrum?Select answer from the options below(CH3)2CHCH(CH3)2BrCH2CH2CH2Cl(CH3)2CHOCH(CH3)2BrCH2CH2CH2Br
What is the meaning of a singlet in a 13C NMR spectrum which is obtained by a technique called off-resonance decoupling?Select answer from the options belowCH (Carbon with one H attached to it)CH2 (Carbon with two H attached to it)C (with no H attached to it)CH3 (Carbon with three H attached to it) Save for LaterSubmit Answer
Which one of the following compounds is expected to show four environments in a 1H NMR spectrum and four environments in a 13C NMR spectrum?a.butan-1-amineb.butan-1-ol c.1-chlorobutaned.butan-2-ol
Using 1H NMR, what key features would be used to differentiate benzene, hexane and 1,2-dichloroethane?Group of answer choicesHexane would give a singlet at 7-8 ppmBenzene would give multiple signals (triplets, quartets etc.) in the 0-1.5 ppm region1,2-dichloroethane would give a singlet in the 2.5-5 ppm region1,2-dichloroethane would give a singlet at 7-8 ppmBenzene would give multiple signals (triplets, quartets etc.) in the 0-1.5 ppm regionHexane would give a singlet in the 2.5-5 ppm regionBenzene would give a singlet at 7-8 ppmHexane would give multiple signals (triplets, quartets etc.) in the 0-1.5 ppm region1,2-dichloroethane would give a singlet in the 2.5-5 ppm region1,2-dichloroethane would give a singlet at 7-8 ppmHexane would give multiple signals (triplets, quartets etc.) in the 0-1.5 ppm regionBenzene would give a singlet in the 2.5-5 ppm region
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.