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What could cause a peak to split into 2 resonances as temperature increases in NMR spectroscopy
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Mark Ornoff
What could cause a peak to split into 2 resonances as temperature increases in NMR spectroscopy
Since I do not know which compound it is, my guess is that you have two different $\ce{H^1}$ that have almost the same chemical shift at room temperature. The chemical shifts change with temperature as for instance in sucrose:
Here are represented mainly the $\ce{H^1}$ of the $\ce{-OH}$ but the $\ce{C-H}$ (the peak of 1) shifts also.
In your case, one is almost fixed, while the other one moves to higher $\delta$ and, therefore, they split into two.
Since I do not know which compound it is, my guess is that you have two different $\ce{H^1}$ that have almost the same chemical shift at room temperature. The chemical shifts change with temperature as for instance in sucrose:
Here are represented mainly the $\ce{H^1}$ of the $\ce{-OH}$ but the $\ce{C-H}$ (the peak of 1) shifts also.
In your case, one is almost fixed, while the other one moves to higher $\delta$ and, therefore, they split into two.
Since I do not know which compound it is, my guess is that you have two different $\ce{H^1}$ that have almost the same chemical shift at room temperature. The chemical shifts change with temperature as for instance in sucrose:
Here are represented mainly the $\ce{H^1}$ of the $\ce{-OH}$ but the $\ce{C-H}$ (the peak of 1) shifts also.
In your case, one is almost fixed, while the other one moves to higher $\delta$ and, therefore, they split into two.
More info on the sucrose spectrum here.
Since I do not know which compound it is, my guess is that you have two different $\ce{H^1}$ that have almost the same chemical shift at room temperature. The chemical shifts change with temperature as for instance in sucrose:
Here are represented mainly the $\ce{H^1}$ of the $\ce{-OH}$ but the $\ce{C-H}$ (the peak of 1) shifts also.
In your case, one is almost fixed, while the other one moves to higher $\delta$ and, therefore, they split into two.
More info on the sucrose spectrum here.
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