Reactions of hexamethylenetetramine with (1-hydroxyethylidene)diphosphonic acid and its salts. Molecular structure of diammonium (1-hydroxyethylidene)diphosphonate
V. V. Semenov, N. V. Zolotareva, B. I. Petrov, N. M. Lazarev, R. V. Rumyantsev, T. I. Lopatina, N. M. Khamaletdinova, T. I. Kulikova, T. A. Kovylina, E. N. Razov
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引用次数: 0
Abstract
The reaction of hexamethylenetetramine (CH2)6N4 with sparingly soluble (1-hydroxyethylidene)diphosphonates M(H2L)•2H2O (M = Mn, Co, Zn; H4L is (1-hydroxyethylidene)diphosphonic acid) afforded water-soluble compounds of the composition [(CH2)6N4H2]ML•2H2O (M = Mn (1), Co (2), Zn (3)). Manganese derivative 1 lost its solubility during storage, whereas the cobalt and zinc compounds retained it. The tetrafunctional base hexamethylenetetramine reacts with tetrafunctional (1-hydroxyethylidene)-diphosphonic acid H4L in methanol to form hexamethylenetetraminium (1-hydroxyethylidene)diphosphonate dihydrate [(CH2)6N4H]+(H3L)•2H2O (4). When heated in an aqueous methanol medium, compound 4 dissociates to acid H4L and base (CH2)6N4, hexamethylenetetramine reacts with water to produce ammonia and formaldehyde, and the acid H4L and ammonia generate diammonium (1-hydroxyethylidene)diphosphonate (NH4)2H2L. The heating in an inert atmosphere causes the extensive decomposition of compound 4 giving a non-volatile water-soluble residue and a series of volatile organic compounds, such as amines, amides, amino alcohols, and amino acids. The obtained compounds were studied by IR spectroscopy, elemental analysis, powder X-ray diffraction, and thermogravimetric analysis. The molecular structure of diammonium (1-hydroxyethylidene)diphosphonate (NH4)2H2L was determined.
期刊介绍：
Publishing nearly 500 original articles a year, by leading Scientists from Russia and throughout the world, Russian Chemical Bulletin is a prominent international journal. The coverage of the journal spans practically all areas of fundamental chemical research and is presented in five sections:
General and Inorganic Chemistry;
Physical Chemistry;
Organic Chemistry;
Organometallic Chemistry;
Chemistry of Natural Compounds and Bioorganic Chemistry.
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