Polynuclear Carbonyls of Manganese, Technetium and Rhenium (1a)
Recently, polynuclear tetracarbonyls of the two heavier metals in the manganese sub -group have been discovered. The first was for technetium (2) as a major by-product during attempts to prepare the pentacarbonyl hydride, and more recently, for rhenium (3) by an analogous route. The dimetal deca — carbonyl is treated first with sodium amalgam in tetrahydrofuran solution. After a time, the solvent is evaporated and cyclohexane and phosphoric acid are added and the heterogeneous mixture is refluxed; desired product is found in the cyclohexane layer. It was later discovered that the use of sodium borohydride in the first step instead of sodium amalgam led to the same products, but in greatly increased yields (3). For the derivative of technetium, an analysis, IR spectrum and molecular weight have been obtained. This and additional data are now available for the derivative of rhenium and these will be reviewed briefly.
KeywordsSodium Borohydride Heterogeneous Mixture Analogous Route Organic Plastic Sodium Amalgam
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- 1.a)Supported by National Science Foundation Grant GP 1696, U. S. A. ;Google Scholar
- 1.b)present address: Research Laboratories, Allied Chemical Corp., Morristown, New Jersey, U. S. A. ;Google Scholar
- 1.c)Publication No. 1661.Google Scholar
- 3.HUGGINS, D. K., FELLMANN, W., SMITH, J. M., and KAESZ, H. D., Abstracts of Papers Presented to the 147th Meeting of the American Chemical Society, April 1964, p.11 L; manuscript in preparation.Google Scholar