Mono-deuterated dimethyl ether: laboratory spectrum up to 1 THz

Submillimeter - wave spectrum of the ethynyl radical , CCH , up to 1 THz

The N = 7 ← 6 to 11 ← 10 pure rotational transitions of CCH, X2Σ+, were measured in the laboratory between 611 and 961 GHz. The radical was produced in a dc glow discharge of a mixture of helium and acetylene. The electron spin-rotation splitting was resolved. The new line frequencies were fit together with previously published data, providing greatly improved spectroscopic constants, such as B...

Accurate laboratory rest frequencies of vibrationally excited CO up to 3 = 3 and up to 2 THz

Aims. Astronomical observations of (sub)millimeter wavelength pure rotational emission lines of the second most abundant molecule in the Universe, CO, hold the promise of probing regions of high temperature and density in the innermost parts of circumstellar envelopes. Methods. The rotational spectrum of vibrationally excited CO up to 3 = 3 has been measured in the laboratory between 220 and 19...

Hollow alumina nanospheres as novel catalyst for the conversion of methanol to dimethyl ether

This paper investigates hollow and porous alumina nanospheres that were previously synthesized to be used for the dehydration of methanol to dimethyl ether (DME). As hollow nanostructures possess characteristics such as low density and high surface to volume ratio, their catalytic activity between hollow and porous structure is compared. For this purpose, three most important parameters (acidit...

A short synthesis of (±)-cherylline dimethyl ether

A synthesis of ±-cherylline dimethyl ether is reported. The key steps involved are Michael-type addition, radical azidonation of an aldehyde, Curtius rearrangement, and reduction of an isocyanate intermediate followed by Pictet-Spengler cyclization.

Dehydration of Methanol to Dimethyl Ether Employing Modified H-ZSM-5 Catalysts