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The work presents experimental data about new analogs of ammonium tetranitro-diamine Co (III) complex (Erdmann complex) with hexamethylenetetramine (hta). The base complex obtained, NH4[CO(NO2)4(hta)]2, as well as the Erdmann complex, present practical importance for agriculture. They contain nitrogen under cationic, anionic, and molecular form and Co (III) as a micronutrient and serve as a source of other micronutrients through the replacement of NH4+ with other complex cations. Some of these complexes are soluble in water, others are hardly soluble and nonhygroscopic. Their efficiency in fertilizing was demonstrated by us experimentally.

CONTRIBUTION TO CO(III) NITROCOMPLEXES CHEMISTRY. NEW ANALAGUES OF NH4[CO(NO2)4(NH3)2] COMPLEX WITH HEXAMETHYLENETETRAMINE