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Reactions of triformylmethane with various types of amino compounds were investigated. Besides with ammonia, triformylmethane reacts spontaneously with primary amines, aminoacids and their esters, urea and related compounds including carbamic acid derivatives. Reactions with amides of carboxylic and sulfonic acids require catalysis with Lewis acids. Primary products are aminomethylenemalonaldehyde derivatives IIIa-IIIv. Reactions of triformylmethane with excess of selected primary amines and two secondary amines (dimethylamine and morpholine) were also studied.

The methods of TG, DTA and DSC were used to study the thermal decompositions of [Ni(H20)6](NO3)2 and [Ni(D20)6](NO3)2 in an atmospheric air medium. Intermediates were isolated at 145, 230 and 245 ~ and were identified by quantitative analysis and IR spectroscopy. The following phase transitions were observed under the conditions of the experiment: melting of the salts, partial dehydration to the tetrahydrate, formation of basic nickel nitrate hydrate stable within) a narrow temperature interval, and formation of NiO.The enthalpies of the phase transitions were calculated from the DSC data.The DTA and DSC data show that in [Ni(D20)6](NO3)2 the phase conversions take place at somewhat lower temperatures than those for [Ni(H20)6](NO3)zThe experimental decomposition of [Ni(H20)6](NO3)2 has been studied by a number of authors. Some of the data obtained are contradictory, while others are complementary.Publications [1][2][3][4][5][6][7][8][9][10] deal with thermal decomposition in air. According to these authors, the compound melts in its crystal water and undergoes step= wise dehydration, the intermediate hydrates differing in composition, depending on the heating rate. It is pointed out in [5] that all the phase tran= sitions occur in the solid phase a t a low rate of heating of 5-20 deg/min. The pentahydrate was reported in [4]. The tetrahydrate, described in [3,5,8], is unstable and is readily converted into the trihydrate [8] or the dihydrate [3,5]. Some authors [i, 9] report that the hexahydrate is converted into the trihydratr without anu tetrahydrate or dihydrate being observed.

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