HELP! URGENT!!

[Dark Horse]

Hey guys, I was just looking through Stav 08. A question is what will the peaks be split into for the proton NMR of ethylene glycol (OHCH₂CH₂OH) I said you would get one triplet and one singlet, however, the answers say two singlets. Could someone explain which one is right for the exam tommorow?

Thanks! I really need it

[d0minicz]

becuz the CH2 wont be split by the adjacent OH

theres two singlets
1 for OH
and one for CH2

[TrueTears]

O shields the H in , no splitting occurs.

H in OH is also shielded by the O, so no splitting occurs.

EDIT: beat me to it d0minicz.

[hyperblade01]

Are you getting the triplet from the CH2 next to CH2?

[arthurk]

adjacent hydrogens in hydrogens from the same environment do not cause splitting to occur as spin spin coupling between them does not occur
i think this was answered in a previous post

[Dark Horse]

So basically, because both of the CH2s are in an identical chemical environment, they wont cause each other to split?

[Dark Horse]

so just say in butane : CH3CH2CH2CH3, will the CH2s be split into 6 or 4?

[TrueTears]

So basically, because both of the CH2s are in an identical chemical environment, they wont cause each other to split?

H's in identical environment do not cause splitting.

[arthurk]

do we have to know about spin spin coupling anyway?

[chem-nerd]

so just say in butane : CH3CH2CH2CH3, will the CH2s be split into 6 or 4?

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