Sodium Bis trimethylsilyl amide, Na

Sodium bis(trimethylsilyl)amide is an air- and moisture-sensitive white solid which is soluble in toluene, diethyl ether, THF, and pyridine. An alternative procedure for its synthesis may be found in an earlier volume of this series.12 

In the glove box, 18.2 g (99.3 mmol) of NaN(SiMe3)2 are placed in an oven-dried, 250-mL Erlenmeyer flask, 100 mL of THF are added, and the solution is gently swirled until all of the sodium bis(trimethylsilyl)amide is 

Tris[bis(trimethylsilyl)amido]uranium is an extremely air- and moisture-sensitive, red-purple solid, which can be stored for months in the absence of air and moisture without noticeable signs of decomposition. It is soluble in both aliphatic and aromatic hydrocarbons. The NMR spectrum in benzene- (250 MHz, 20°C) shows a single broad resonance at d — 11.5.11 The compound sublimes readily at 80°C under good vacuum (10 6 torr). The checkers report a melting point of 137-140°C. The IR spectrum, recorded as a Nujol mull between KBr plates, has absorptions at 1248(s), 1170(w), 990(s), 860(s), 828(s), 764(m), 676(m), 654(m), and 598(m) cm1. Other physicochemical properties are described in the literature.4 

Seaborg, The Chemistry of the Actinide Elements, Vols. 1 and 2, Chapman and Hall, New York, 1986, and references therein. 

Shriver and M. A. Drezdzon, The Manipulation of Air-Sensitive Compounds, 2nd ed., Wiley Interscience, New York, 1986. 

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