Photochemical isomerisation of boryl-substituted silole derivatives.

Cis-trans isomerisation of azobenzenes studied by laser-coupled NMR spectroscopy and DFT calculations.

In a combined experimental and computational study of a group of para-substituted azobenzenes, the effects of substituents and solvent on the kinetics of thermal cis-to-trans isomerisation have been examined and the success of DFT calculations in predicting kinetic parameters assessed. Mono-substituted species are predicted to isomerise by inversion in both non-polar and polar solvent, whereas ...

Comparative study of the photochemical properties of silole, thiophene and furan

Synthesis of azetidines and pyrrolidines via iodocyclisation of homoallyl amines and exploration of activity in a zebrafish embryo assay.

Room temperature iodocyclisation of homoallylamines stereoselectively delivers functionalised 2-(iodomethyl)azetidine derivatives in high yield. Increasing reaction temperature from 20 °C to 50 °C switches the reaction outcome to realise the stereoselective formation of functionalised 3-iodopyrrolidine derivatives. It was shown that these pyrrolidines are formed via thermal isomerisation of the...

Silylboranes bearing dialkylamino groups on silicon as silylene equivalents: palladium-catalyzed regioselective synthesis of 2,4-disubstituted siloles.

Siloles have received much attention in materials sciences because of their unique electronic properties, arising mainly from their low-lying LUMO.1 Particular interest has been focused on the application of π-conjugated siloles to light-emitting materials.2 As the properties of siloles largely depend upon the substituents on the silole ring, much effort has been devoted to the development of n...

Fluorenyl - substituted silole molecules : geometric , electronic , optical , and device properties †

A series of silole molecules with fluorenyl substituents at varying positions—1-(9,9-dimethylfluoren-2yl)-1,2,3,4,5-pentaphenylsilole, 1-(fluoren-9-yl)-1,2,3,4,5-pentaphenylsilole, 1,1,3,4-tetraphenyl-2, 5-bis(9,9-dimethylfluoren-2-yl)silole, and 1,1-diphenyl-2,3,4,5-tetrakis(9,9-dimethylfluoren-2yl)silole—has been synthesized and compared to the previously reported compounds, 1,1,2,3,4,5hexaph...