FIELD: chemical technology. SUBSTANCE: product: technetium pentacarbonylhalogenide of the general formula Tc(CO)5X where X - Cl, Br, J. Potassium pertechnetate in the form of 7-11.5M aqueous solution of halogenhydrogen acid and formic acid taken at the molar ratio 1:(6-6.5):(180-200) is placed into autoclave and heated up to 120-140 C. Synthesis is carried out for 2.5-3 h. Prepared crystalline precipitate of technetium pentacarbonylhalogenide is separated from the solution, washed and dried. Yield of product is 96% . Synthesis is carried out for a single stage. Product is used for preparing of technetium films and coatings. EFFECT: improved method of preparing. 1 tbl
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