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  • Küçük Resim
    Öğe
    Crystal structure and Hirshfeld surface analysis of (E)-3-[(4-fluorobenzylidene)amino]-5-phenylthia-zolidin-2-iminium bromide
    (2019) Khalilov, Ali N.; Atioğlu, Zeliha; Akkurt, Mehmet; Duruskari, Gulnara Sh.; Toze, A. A. Flavien; Huseynova, Afet T.
    In the cation of the title salt, C16H15FN3S+·Br?, the phenyl ring is disordered over two sets of sites with a refined occupancy ratio of 0.503?(4):0.497?(4). The mean plane of the thia­zolidine ring makes dihedral angles of 13.51?(14), 48.6?(3) and 76.5?(3)° with the fluoro­phenyl ring and the major- and minor-disorder components of the phenyl ring, respectively. The central thia­zolidine ring adopts an envelope conformation. In the crystal, centrosymmetrically related cations and anions are linked into dimeric units via N—H...Br hydrogen bonds, which are further connected by weak C—H...Br hydrogen bonds into chains parallel to [110]. Hirshfeld surface analysis and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H...H (44.3%), Br...H/H...Br (16.8%), C...H/H...C (13.9%), F...H/H...F (10.3%) and S...H/H...S (3.8%) inter­actions.
  • Küçük Resim
    Öğe
    Crystal structure and Hirshfeld surface analysis of 5, 7-diphenyl-1, 2, 3, 5, 6, 7-hexahydroimidazo [1, 2-a] pyridine-6, 6, 8-tricarbonitrile methanol monosolvate
    (2021) Naghiyev, Farid N; Mammadova, Gunay Z.; Khalilov, Ali N.; Atioğlu, Zeliha; Akkurt, Mehmet; Akobirshoeva, AA; Mamedov, İG
    In the title compound, C22H17N5·CH4O, the imidazolidine ring of the 1,2,3,5,6,7-hexahydroimidazo[1,2-a]pyridine ring system is a twisted envelope, while the 1,2,3,4-tetrahydropyridine ring adopts a twisted boat conformation. In the crystal, pairs of molecules are linked by O—H?N and N—H?O hydrogen bonds via two methanol molecules, forming a centrosymmetric R44(16) ring motif. These motifs are connected to each other by C—H?N hydrogen bonds and form columns along the a axis. The columns form a stable molecular packing, being connected to each other by van der Waals interactions. A Hirshfeld surface analysis indicates that the most significant contributions to the crystal packing are from H?H (43.8%), N?H/H?N (31.7%) and C?H/H?C (18.4%) contacts.