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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: asdaf7477 on April 17, 2010, 07:58:37 PM

Title: Mg NMR - environments at different temperatures
Post by: asdaf7477 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?

Title: Re: Mg NMR - environments at different temperatures
Post by: pacifyer on April 20, 2010, 06:29:48 PM

Think on how many species are present in each case. Obviously Schlenk equilibrium is the key.