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Topic: Mg NMR - environments at different temperatures  (Read 2665 times)

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Offline asdaf7477

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Mg NMR - environments at different temperatures
« on: April 17, 2010, 07:58:37 PM »
The 25Mg NMR on EtMgBr in toluene shows that the is only one Mg environment at 70 degrees, but there are 3 at room temperature. Why is this? At the higher temperature there is coalescence to a single signal, but how does it have anything to do with the temperature dependence of the Schlenk equilibrium?

Offline pacifyer

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Re: Mg NMR - environments at different temperatures
« Reply #1 on: April 20, 2010, 06:29:48 PM »
Think on how many species are present in each case. Obviously Schlenk equilibrium is the key.

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