Actinide metal amides compounds

A large number of urea and substituted urea complexes with actinide(IV) compounds are known in these the ligands are bonded to the metal via the carbonyl oxygen atom, and these complexes are therefore described in the section dealing with carboxylic add amide complexes (p. 1164). 

The monochlorotris-silylamides, [(Me3Si)3N]3MCI, of the two most readily accessible actinide elements, thorium and uranium, have been prepared by reaction of three molar equivalents of sodium bis(trimethylsilyl)amide and the metal chloride in tetrahydrofuran. The thorium derivative is a colorless, diamagnetic, pentane soluble compound which is rtionomeric in the gas phase (by mass spectrometry) (19, 20). The tan uranium analogue is paramagnetic (yB = 2.8 B.M.) (20). 

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