Low Temperature n-alkanes Bromination without Catalysts

Extreme catalysts from low-temperature environments.

Cold-loving or psychrophilic organisms are widely distributed in nature as a large part of the earth's surface is at temperatures around 0 degrees C. To maintain metabolic rates and to prosper in cold environments, these extremophilic organisms have developed a vast array of adaptations. One main adaptive strategy developed in order to cope with the reduction of chemical reaction rates induced ...

Temperature-Dependent Terahertz Spectroscopy of Liquid n-alkanes

We describe measurements of the terahertz dielectric properties of normal alkanes. We study all of the liquid alkanes from pentane (C5) to hexadecane (C16) over the temperature range from 20–80°C, and obtain the absorption coefficients and refractive indices in the spectral range from 0.1 to 2.5 THz (3–83 cm). The mean molecular polarizability is found to vary linearly with chain length at all ...

Nanostructured Catalysts in Activation of Light Alkanes

The activation of small alkane molecules originating from natural gas or renewable resources on metal oxide surfaces regains increasing scientific interest since direct utilization of saturated hydrocarbons will offer alternative pathways to higher value chemicals in a postpetroleum era. The focus of the project lies on oxidation catalysis of small alkane molecules including methane, ethane, pr...

Experimental confirmation of the low-temperature oxidation scheme of alkanes.

Regioselective bromination of fused heterocyclic N-oxides.

A mild method for the regioselective C2-bromination of fused azine N-oxides is presented, employing tosic anhydride as the activator and tetra-n-butylammonium bromide as the nucleophilic bromide source. The C2-brominated compounds are produced in moderate to excellent yields and with excellent regioselectivity in most cases. The potential extension of this method to other halogens, effecting C2...