Magnesium compounds amides

Anhydrous magnesium sulphate. This is an excellent, neutral desiccating agent and is inexpensive. It is rapid in its action, chemically inert and fairly efficient, and can be employed for most compounds including those (esters, aldehydes, ketones, nitriles, amides, etc.) to which calcium chloride is not applicable. 

The stability of phosphinous amides depends, to a large extent, on the substituents at phosphorus and nitrogen. Normally, tetrasubstituted and N,P,P-trisubstituted phosphinous amides are stable and well-known compounds. The parent compound H2PNH2 is a volatile compound that is formed on hydrolysis of a solid state solution mixture of magnesium phosphide and magnesium... 

The structures in the solid state of three of the initially formed organomagnesium amides, 222, 223 and 224, were determined by X-ray crystallography. All three compounds are discrete monomers and have comparable structures of which that of 222 is shown (Figure 93). In 222 the ethyl group is a-bonded to magnesium and interacts with the three nitrogen atoms of the A-alkylated 2,6-bis(imino)pyridine in a pincer-type ... 

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