Crystal structure of hexakis-(N-methylthiourea) bismuth(III) triperchlorate

Structure of two new compounds of fluoroquinolone antibiotics with mineral acids

“…Cations А and В in compound II are also linked into pairs via "head-totail" π-π-interaction, and the structural units consisting of two cations and four anions are bonded only by van der Waals forces. The geometric parameters of π-π-interactions in compounds I and II are close to the values found in some other fluoroquinolone derivatives [8][9][10][11]17]. x, y, z x -0.5, 0.5 -y, z -0.5 0.5 -x, 0.5 + y, 1.5 -z x, y, z x -0.5, 0.5 -y, z + 0.…”

“…Their application in medicine is complicated by a low solubility in water, hygroscopicity, and the formation of polymorphic and hydrated forms [5][6][7]. Ionic compounds of fluoroquinolones are better soluble and crystallized [8][9][10][11][12] and can be suitable ingredients of new medicines. Within the framework of the systematic study of their molecular and supramolecular structure, two new compounds, such as sparfloxacinium bromide SfH ⋅ HBr (I) and levofloxacindium diperchlorate LevoH ⋅ 2HClO 4 (II) have been synthesized and characterized by X-ray diffraction.…”

Crystal structure of [Bi(N-ethylthiourea)4(ClO4)2]ClO4

“…The Cl1-O distances in the inner-sphere Crystallographic data, details of data collection, and characteristics of data refinement of the structure of I [18] and N-methylthiourea (Mtu) [19], an unusual ratio of stepwise stability constants (K n ) was found: K n + 1 ≥ K n . [21]. The combination of these facts can be due to the influence of the nature of thiourea ligand and synthesis conditions on the bismuth(III) coordination environment.…”