New host molecules, 4,4′-bis(dimethylamino-urea)diphenylmethane (1) and its derivatives (2 and 3), are reported. These hosts are shown to give inclusion complex crystals with a wide variety of organic guest molecules with high selectivity. The crystal structure of 1:2 inclusion complex of 1 with THF has been determined from X-ray crystal structure analysis. The cyclic N-H...O intermolecular hydrogen bonds between host molecules were found to form columns for accommodation of the guest molecules.
Tanaka, Koichi,Daikawa, Naoki,Ohba, Shigeru
p. 579 - 581
(2007/10/03)
Reaction of unsymmetrical dialkylhydrazines with diisocyanates
1,1-Disubstituted bissemicarbazides were obtained by the reaction of an excess of unsymmetrical dialkylhydrazines with diisocyanates.The corresponding tetracarboxylic acids were obtained by the reaction of an excess of maleic anhydride with bis.
Shevchenko, V. V.,Klimenko, N. S.,Vasil'evskaya, G. A.
p. 2247 - 2248
(2007/10/02)
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