Tetraphenylarsonium Hexacarbonylniobate

The properties of this salt are very similar to those of the tantalum compound. The infrared spectrum of the compound in the carbonyl region is given in Table I. 

thesis, Massachusetts Institute of Technology, Cambridge, Mass., 1970. 

Fieser and M. Fieser, Reagents for Organic Synthesis, p. 1102, John Wiley Sons, Inc., New York, 1967. 

Inorganic Syntheses, Volume XVI Edited by Fred Basolo Copyright 1976 by McGraw-Hill, Inc. 

The cation [Ru(NHs)5(NO)]3+ can be prepared by several methods. Probably the most convenient is to pass NO through an acid solution of [Ru-(NH3)e]Br3. Precipitation of the product with excess HBr gives an essentially quantitative yield of [Ru(NHs)5(N0)]Br3-H20. The 1 and Ch salts are prepared from this by metathesis using concentrated hydroiodic and hydrochloric acids, respectively. 

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