Interpreting NMR spectra 2

[@abdusfahim7144]

Some questions don’t include integration numbers. How do we figure out the structure then?

[@TA-ud5lf]

even though the chemical shift value is 4.6 ppm, it is C-H but C-H on the data sheet has a value between 1-4.1-6?

[@gaarthiktharmarajah9569]

isn't there a peak at 4.6 which represents O-H.

[@TruthPrevailsAlways-1]

Hi, what's the final compound called?

[@HM-dy3tt]

how do we know if we have to look at the question from a c13 or proton nmr perspective. will they tell us?

[@AlleryChemistry]

Yes or just look at the numbers. 13C have bigger shift numbers than 1H.

[@anummari745]

Thanks a ton!! Kindly help me with these too; 1.Regarding the theory of NMR, is it true that protons in diff chemical environment have a different energy gap between their two states (i.e parallel and antiparallel) ? Does that depend on how much shielded they are? ^ my book says so but from what I have been studying in quantum physics is that a particular atom has its own energy gap for electron which must not vary and is the same for all the atoms of the same element.. ---> is that all true only for an electron & not for an nuclei?? Kindly correct me if I'm wrong 2. My notes say that if five protons give a singlet at a chemical shift of 7-7.3 it means a benzene ring is present in the compound while if 5 protons give a multiplet then benzene is directly attached to a functional group.. ^ I don't get how.. please explain

[@rkbegg6785]

Who is that one person that disliked.

[@dailyplanet8817]

What if the question doesn't give the value of peak A,B,C?

[@AlleryChemistry]

+Leanard Chong I assume you are talking about the integration values in blue. These will be given to you in the exam.