Audiology-Med
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How do you work out the splitting patterns for 1,3 dioxane , it was a question on a past paper and dont know how they got there answer.
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charco
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(Original post by haseebi82)
How do you work out the splitting patterns for 1,3 dioxane , it was a question on a past paper and don't know how they got there answer.
There are three environments.

The 2H environment on C2 is not split it has no adjacent hydrogen atoms.

The 2H environments on C4 and C6 are chemically identical giving a 4H integral. These are split into a triplet by the 2H on C5

2H on C5 has integral 2 and is split into a multiplet by the 4H equivalent (C4 & C6)

... and here it is!

Name:  1,3-dioxane_nmr.gif
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Audiology-Med
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thanks I think i understand it now, I just need to remind my self of multiplets
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(Original post by charco)
There are three environments.

The 2H environment on C2 is not split it has no adjacent hydrogen atoms.

The 2H environments on C4 and C6 are chemically identical giving a 4H integral. These are split into a triplet by the 2H on C5

2H on C5 has integral 2 and is split into a multiplet by the 4H equivalent (C4 & C6)

... and here it is!

Name:  1,3-dioxane_nmr.gif
Views: 2489
Size:  11.7 KB
one more thing, you know how theres ---O---CH2----O-- in its structure , why does the CH2 not split the O to cause a singlet
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username913907
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(Original post by haseebi82)
one more thing, you know how theres ---O---CH2----O-- in its structure , why does the CH2 not split the O to cause a singlet
Proton!!!! NMR.... we only measure the signals caused by the interaction of the Hydrogen nuclei with the spectrometer
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so does the Singlet have 2 protons in its environment
The triplet have 4 protons in its environment
and the multiplet have two protons in its environment
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#7
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(Original post by charco)
There are three environments.

The 2H environment on C2 is not split it has no adjacent hydrogen atoms.

The 2H environments on C4 and C6 are chemically identical giving a 4H integral. These are split into a triplet by the 2H on C5

2H on C5 has integral 2 and is split into a multiplet by the 4H equivalent (C4 & C6)

... and here it is!

Name:  1,3-dioxane_nmr.gif
Views: 2489
Size:  11.7 KB
so does the Singlet have 2 protons in its environment
The triplet have 4 protons in its environment
and the multiplet have two protons in its environment
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charco
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(Original post by haseebi82)
so does the Singlet have 2 protons in its environment
The triplet have 4 protons in its environment
and the multiplet have two protons in its environment
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