Hydrogen and halogen bonds are important anisotropic attractive interactions in the molecular crystalline state. 2,6-dibromophenol (1) was analyzed by single-crystal X-ray diffraction for first time. The intermolecular interaction pattern studied Hirshfeld surface analysis along with 2D fingerprint diagrams. characteristic that dominate crystal packing electrostatic type-II Br⋅⋅⋅Br interactions...

Water has anomalous properties that emanate from its hydrogen-bond-induced structure. Most of the unique properties ofwater are related to the network of strong three-dimensional hydrogen bonds that interconnect the water molecules [1, 2]. According to Stillinger [3], water has a preferential three-dimensional tetrahedral structure containing a few free or single-bonded water molecules. A simul...

Co-crystallisation of, in particular, 4-iodotetrafluorophenol with a series of secondary and tertiary cyclic amines results in deprotonation of the phenol and formation of the corresponding ammonium phenate. Careful examination of the X-ray single-crystal structures shows that the phenate anion develops a C=O double bond and that the C-C bond lengths in the ring suggest a Meissenheimer-like del...

The hydrogen bonds involving sulfur (sulfur center hydrogen bonds; SCHBs) are generally regarded as weak H-bonds in comparison with the conventional N–H· · ·O, O–H· · ·O, N–H· · ·N and O–H· · ·N H-bonds. One of the reasons being considered for this is the smaller electronegativity of S than O or N. However, recent high resolution laser spectroscopy in combination with quantum chemical calculati...

Among the methods used for synthesis of functionalized heterocyclic compounds, photochemistry has gained immense popularity due to reactivity intermediates in photoinduced reactions. In this study, we report on effect diaryl disulfides as hydrogen atom transfer catalysts transformations pyrazolo[1,2-a]pyrazolones. After excitation with visible light, these compounds are susceptible C–N bond cle...

The title compound, C(18)H(16)BrN(3)O(4)S, is a Schiff base ligand of 5-bromo-salicylaldehyde and sulfisoxazole [or N-(3,4-dimethyl-5-isoxazol)sulfanilamide]. The present structure is a zwitterion and is a more precise reinterpretation of the structure which was originally reported by Hämäläinen, Lehtinen & Turpeinen [Arch. Pharm. (1986), 319, 415-420]. The two aromatic rings which make π-π int...

The diversity of the self-assembled structures of a Cu complex via hydrogen bonding, including a square planar unit, is reported. The Cu complex forms two self-assembled structures by hydrogen bonding, depending on the acidity of the recrystallization conditions. A linear chain structure can be produced under acidic conditions, and a three-dimensional network structure is observed under basic c...

11H-Indeno[1,2-b]quinoxalin-11-one oxime (IQ-1) and tryptanthrin-6-oxime are potent c-Jun N-terminal kinase 3 (JNK-3) inhibitors demonstrating neuroprotective, anti-inflammatory anti-arthritic activity. However, the stereochemical configuration of carbon–nitrogen double bond (E- or Z-) in these compounds was so far unknown. In this contribution, we report results determination solid state by si...

Many of the remarkable physical and chemical properties of liquid water are due to the strong influence hydrogen bonds have on its microscopic dynamics. However, because of the fast timescales involved, there are relatively few experimental techniques capable of directly probing rearrangements of water’s hydrogen bonded network. In this thesis, I investigate ultrafast intermolecular dynamics of...