4-[(4-Hydroxymethyl-2H-1,2,3-triazol-2-yl)methyl]-6,8-dimethyl-2H-chromen-2-one. Corrigendum

In the paper by El-Khatatneh et al. [IUCrData (2016), 1, x161644], the scheme and chemical name in the title are corrected.

6-tert-Butyl-4-[(4-hydroxymethyl-2H-1,2,3-triazol-2-yl)methyl]-2H-chromen-2-one. Corrigendum

In the paper by El-Khatatneh et al. [IUCrData (2016), 1, x161618], the scheme and chemical name in the title are corrected.

4-[(4-Hydroxymethyl-2H-1,2,3-triazol-2-yl)methyl]-6-isopropyl-2H-chromen-2-one

In the title compound, C16H17N3O3, the chromene ring is planar, with a maximum deviation of 0.017 (4) Å for the ring O atom. The triazole and the chromene rings, bridged by a methylene C atom, are inclined to one another by 78.3 (2)°. In the crystal, methylene–triazole C—H...N hydrogen bonds lead to the formation of helical supramolecular chains along thebaxis. The sample was refined as an inversion twin. The terminal methylhydroxy group is disordered over two sets of sites [site occupancy = 0.610 (13) for the major component].

6-tert-Butyl-4-[(4-hydroxymethyl-2H-1,2,3-triazol-2-yl)methyl]-2H-chromen-2-one

In the title compound, C17H19N3O3, the triazole ring and the chromene ring system [maximum deviation = 0.018 (2) Å for the O atom] bridged via a methylene C atom, are inclined to one another by 73.2 (1)°. In the crystal, molecules are linked by O—H...N hydrogen bonds, forming zigzag chains along [001]. The chains are linked by C—H...O hydrogen bonds, forming layers parallel to (010), and these layers are linked by C—H...π and π–π interactions [intercentroid distance = 3.557 (1) Å], forming a three-dimensional newwork. The hydroxymethyl group at the 4-position of the triazole ring is disordered over two sets of sites, with a refined occupancy ratio of 0.418 (11):0.584 (11).

4-[(4-Hydroxymethyl-2H-1,2,3-triazol-2-yl)methyl]-6,8-dimethyl-2H-chromen-2-one

In the title compound, C15H15N3O3, the dihedral angle between the triazole ring and coumarin ring system [r.m.s. deviation = 0.040 Å] is 77.40 (6)°. The O atom of the hydroxymethyl group deviates from the triazole ring plane by 1.345 (1) Å. In the crystal, inversion dimers linked by pairs of O—H...O hydrogen bonds generate R 2 2(22) loops; C—H...O and C—H...N interactions link the dimers into a three-dimensional network.

Crystal structure of 4-azido-methyl-6-tert-butyl-2H-chromen-2-one

In the title compound, C14H15N3O2, one of the methyl C atoms of the tert-butyl group lies almost in the plane of the chromene ring system [deviation = -0.097 (2) Å], one lies above and one lies below [deviations = 1.460 (3) and 1.006 (3) Å, respectively]. The C-C-N-N torsion angle is 142.33 (17)°. In the crystal, moelcules are linked by weak C-H⋯O hydrogen bonds to generate C(6) chains propagating in the [010] direction.

Crystal structure of 4-azido-methyl-6-isopropyl-2H-chromen-2-one

In the title mol­ecule, C₁₃H₁₃N₃O₂, the benzo­pyran ring system is essentially planar, with a maximum deviation of 0.017 (1) Å. In the crystal, weak C—H⋯O hydrogen bonds link mol­ecules into ladders along [010]. In addition, π–π inter­actions between inversion-related mol­ecules, with centroid–centroid distances in the range 3.679 (2)–3.876 (2) Å, complete a two-dimensional network parallel to (001).

Viral morphogenesis and morphological changes in human neuronal cells following Tioman and Menangle virus infection

Tioman virus (TioPV) and Menangle virus (MenPV) are two antigenically and genetically related paramyxoviruses (genus: Rubulavirus, family: Paramyxoviridae) isolated from Peninsular Malaysia (2001) and Australia (1997), respectively. Both viruses are potential zoonotic agents. In the present study, the infectivity, growth kinetics, morphology and morphogenesis of these two paramyxoviruses in a human neuronal cell (SK-N-SH) line were investigated. Sub-confluent SK-N-SH cells were infected with TioPV and MenPV at similar multiplicity of infection. These cells were examined by conventional and immunoelectron microscopy, and virus titres in the supernatants were assayed. Syncytia were observed for both infections in SK-N-SH cells and were more pronounced during the early stages of TioPV infection. The TioPV titre increased consistently (10(1)) every 12 h after infection. In MenPV-infected cells, cellular material was frequently observed within budding virions, and microfilaments and microtubules were abundant. Viral budding was common, and extracellular MenPVs tended to be more pleomorphic compared to TioPVs, which appeared to be more spherical in appearance. The MenPV cytoplasmic viral inclusion appeared to be comparatively smaller, loose and interspersed with randomly scattered circle-like particles, whereas huge tubule-like cytoplasmic inclusions were observed in TioPV-infected cells. Both viruses also displayed different cellular pathology in the SK-N-SH cells. The intracellular ultrastructural characteristics of these two viruses in infected neuronal cells may allow them to be differentiated by electron microscopy.