| Autor: |
Savchenkov A; Samara National Research University, Samara 443011, Russian Federation., Demina L; A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninskii pr. 31-4, Moscow 119071, Russian Federation., Safonov A; A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninskii pr. 31-4, Moscow 119071, Russian Federation., Grigoriev M; A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninskii pr. 31-4, Moscow 119071, Russian Federation., Solovov R; A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninskii pr. 31-4, Moscow 119071, Russian Federation., Abkhalimov E; A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninskii pr. 31-4, Moscow 119071, Russian Federation. |
| Abstrakt: |
Two new gold(III) complexes with adenine or guanine nitrogenous bases as counter-cations were synthesized. These are 6-amino-7H-purine-1,9-diium tetrachloridogold(III) chloride monohydrate, (C 5 H 7 N 5 )[AuCl 4 ]Cl·H 2 O, 1, and 2-amino-6-oxo-6,7-dihydro-1H-purin-9-ium tetrachloridogold(III) hemihydrate, (C 5 H 6 N 5 O)[AuCl 4 ]·0.5H 2 O, 2. Their crystal structures were studied using single-crystal X-ray diffraction and FT-IR spectroscopic techniques. The arrangement of species in the studied crystal structures implies π-stacking interactions, as well as concomitant C-H...π interactions, hydrogen bonds and other types of noncovalent interactions, which were studied qualitatively and quantitatively using the method of molecular Voronoi-Dirichlet polyhedra. The variation of the nitrogenous base from adenine to guanine results in evident differences in the packing of the species in the crystals of 1 and 2. The splitting and shifting of bands in the FT-IR spectra of the title compounds reveals several features representative of noncovalent interactions in their crystal structures. |
