Strategies in the synthesis of dibenzo[]heteropines.

The dibenzo[]azepine skeleton is important in the pharmaceutical industry, not only in terms of existing commercial antidepressants, anxiolytics and anticonvulsants, but also in reengineering for other applications. More recently, the potential of the dibenzo[]azepine moiety in organic light emitting diodes and dye-sensitized solar cell dyes has been recognised, while catalysts and molecular organic frameworks with dibenzo[]azepine derived ligands have also been reported. This review provides a brief overview of the different synthetic strategies to dibenzo[]azepines and other dibenzo[]heteropines.

NMR data of a Grubbs 2 generation catalyst -cresolate derivative.

The data presented in this article is related to the research article entitled "Spectroscopic characterisation of Grubbs 2 generation catalyst and its -cresol derivatives" (Swart 2021). The 1D and 2D NMR characterisation data of the cresol derivative of the Grubbs 2 generation catalyst, where one of the chloride ligands is replaced by the -cresolate to form a Ru-O coordination compound () is reported. The characterization data include information obtained from H, C, Heteronuclear Single Quantum Coherence (HSQC), Heteronuclear Multiple Bond Correlation (HMBC), Homonuclear Correlation Spectroscopy (COSY), Nuclear Overhauser Effect (NOE) and Distortionless Enhancement by Polarization Transfer (DEPT) NMR spectroscopy.

The role of neutral and ionized oxygen defects in the emission of tin oxide nanocrystals for near white light application.

Tin oxide (SnO2) nanocrystals (NCs) based phosphor was synthesized by a green chemistry microwave-assisted hydrothermal method at different reactor pressures. The x-ray diffraction analysis showed that a single rutile SnO2 phase with a tetragonal lattice structure was formed. The photoluminescence emission was measured for He-Cd laser excitation at 325 nm and it showed a broad band emission from 400 to 800 nm for all the synthesized reactor pressures.

2,5-Dihexyl-thio-phene 1,1-dioxide.

In the title mol-ecule, C16H28O2S, the two n-hexyl groups are in all-trans conformations. Their C atoms are situated close to the plane of the thio-phene ring with a maximum deviation of 0.718 (6) Å for one of the terminal methyl groups.

4-(2-Bromo-phen-yl)-2-phenyl-pyrano[3,2-c]chromen-5(4H)-one.

In the title compound, C24H15BrO3, the pyran-ochromenone ring is essentially planar, while the 2-bromo-phenyl group is almost perpendicular to it [85.58 (6)°]. In the crystal, inversion dimers linked by pairs of weak C-H⋯π bonds occur; there is also a short inter-atomic contact found between the Br and carbonyl O atoms [3.