Halogenoid acids and salts thereof

Abstract

The invention relates to the field of inorganic chemistry and presents a new class of acids and their salts, in particular, a class of halogenoid acids with a general formula H.sub.mXO.sub.(V+m-n)/2Ha.sub.n, where X is a non-metal of group 4, 5 or 6 of the periodic table of elements, V is its valence in the compound, Ha is a halogen, which may find application in chemical treatment of materials, as a part of fertilizers or insecticides in agriculture, in medicine, etc. In particular, the object of the invention is a fluoro-nitric acid of the formula H.sub.2NO.sub.3F with the structural formula ##STR00001## In particular, the object of the invention is a chloro-nitric acid of the formula H.sub.2NO.sub.3Cl with the structural formula ##STR00002## In particular, the object of the invention is a sulfuro-chlorous acid of the formula H.sub.2SO.sub.3Cl.sub.2 with the structural formula ##STR00003##

Claims

1. A Halogenoid acid of the general formula H.sub.2NO.sub.3Ha or a salt thereof, Ha is a halogen.

2. The acid of claim 1 which is fluoro-nitric acid with the formula H.sub.2NO.sub.3F, its structural formula being as follows: ##STR00007## or a salt thereof.

3. The acid of claim 1 which is chloro-nitric acid with the formula H.sub.2NO.sub.3Cl, its structural formula being as follows ##STR00008## or a salt thereof.

4. A sulfuro-chlorous acid with the formula H.sub.2SO.sub.3Cl.sub.2, its structural formula being as follows ##STR00009## or a salt thereof.

Description

EXAMPLE 1

(1) To obtain fluoro-nitric acid as a source product, a mixture is prepared of 97.3 g (1.41 mol) of anhydrous lithium nitrate and 2.7 g (0.104 mol) of anhydrous lithium fluoride. The resulting mixture is fused at a temperature of 350° C. and kept at this temperature for 15-20 minutes until complete homogenization, then cooled down to room temperature and dissolved in 100 ml of distilled water. 40.5 ml of 85% solution of orthophosphoric acid is added to the resulting solution for the formation of poorly soluble lithium phosphate. The precipitate is filtered and a solution containing a mixture of nitric acid and fluoro-nitric acids, with traces of orthophosphoric acid, is obtained.

EXAMPLE 2

(2) To obtain chloro-nitric acid as a source product, a mixture is prepared of 99 g (1.435 mol) of anhydrous lithium nitrate and 1 g (0.0235 mol) of anhydrous lithium chloride. The resulting mixture is fused at a temperature of 350° C. and kept at this temperature for 15-20 minutes until complete homogenization, then cooled down to room temperature and dissolved in 100 ml of distilled water. 39 ml of 85% solution of orthophosphoric acid is added to the resulting solution for the formation of poorly soluble lithium phosphate. The precipitate is filtered and a solution containing a mixture of nitric acid and chloro-nitric acids, with traces of orthophosphoric acid, is obtained.

(3) Therefore, the claimed acids and their salts enable to dope oxide films on the surface of metals or semiconductors, as these are in the course of anodic oxidation, with halogens, which was previously inaccessible.

(4) Doping of oxide films is the non-limiting field of application of the invention. The claimed acids and their salts may also be used in other fields of activities, e.g., in chemical treatment of materials, as a part of fertilizers or insecticides in agriculture, in medicine, etc.