THE CRYSTAL STRUCTURES OF CONDENSATIONS PRODUCTS OF AMINOGUANYDINE NITRATE WITH ACETYLACETONE. Mirjalalov F.F., Khudayarov A.B., Sharipov Kh.T., Institute of Chemistry, RO"Spetsplav", Uzbekistan.

The X-ray diffraction studies of condensations products of aminoguanydine nitrate with acetylacetone obtained in aqueous-alcohol medium with pH=1 - 1-guanyl-3,5-dimethylpyrazole nitrate (I) and with pH=9 - 1-aminoguanidine-2-guanyl-1,4 dimethylpyrazoline nitrate (II) were carried out. The structure I crystallizes in the monoclini sp.gr. C2/c, a=19.082(6), b=7.096(2), c=16.195(5)A, b=121.64_o, d=1.43 g/cm₃, Z=8, R=0.043; II - in the rhombic sp.gr. P2₁2₁2₁, a=7.500(1), b=13.880(2), c=14.276(2), d=1.51 g/cm₃, Z=4, R=0.064. The structure I consist of planar positive C₆H₁₁N₄⁺ ions hydrogen-bonded to NO₃^-. The conjugations of pi-orbitals of five-membered ring in I are observed. Unlike I, in five-membered ring of dipositive, nonplanar C₇H₁₈N₈²⁺ ion conjugations of pi-orbital are absent. Both in I and II positive charges derived from protonisation delocalized in guanyl fragment of cations.