Does Z' equal 1 or 2? Enhanced powder NMR crystallography verification of a disordered room temperature crystal structure of a p38 inhibitor for chronic obstructive pulmonary disease
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The structure of Cs3Bi2I9 has been refined to R = 0.0165 on the basis of X-ray diffraction measurements at T = 290 K (STOE IPDS diffractometer; MoKalpha-radiation; 296 nonequivalent reflection with I > 2 sigma(I)). The absorption correction was accounted f ...
The theory describing nuclear cross-polarization from a spin-1 to spin-1/2 is generalized to sweeps of the radio-frequency field amplitude. This allows efficient cross-polarization over the entire width of the deuterium NMR spectrum of partially oriented s ...
At -20 degrees C, SO2 undergoes homocheletropic addition with 7,7-dimethyl[2.2.1]hericene (18) to give (1R,5S)-6,10-dimethylidene-8-isopropylidene-3-thiatetracyclo[5.2.1.0(1,5 ).0(5,9)]decane 3,3-dioxide (21). This 3,3-dioxide (21). This sulfolane Is isome ...
The lithium enolate 16 derived in 5 steps from the Diels-Alder adduct of furan to 1-cyanovinyl (1S)-camphanate [(+)-12: a "naked sugar" of the first generation] was reacted with (+)(1R,4S,5S,6S)-6-endo-chroro-3-methylidene-5-exo-phenylseleno-7-oxabic yclo[ ...
2,2,6,6-Tetramethylpiperidine (tmpH) reacts smoothly with AlX3 (X = Cl, Br, I) and AlH2Cl.2THF to give the addn. compds. tmpH.AlX3 (X = Cl, Br, I) and tmpH.AlH2Cl, resp. These adducts of the secondary amine tmpH are stable and do not undergo intramol. elim ...
The methanol dehydration reaction was studied over environmentally benign, easily accessible and inexpensive K10 montmorillonite clay used as the catalyst at a temperature range between 200–700 °C. Nearly 100% selectivity towards dimethyl ether (DME) at 80 ...
The reactions of [Fe2(CO)9] with 2-exo,3-exo-bis(chloromethyl)-5,6-di(methylidene)-7-oxabicyclo[2.2.1]hep tane (5) and with 5,6-di(methylidene)-7-oxabicyclo[2.2.1]heptane-2-exo,3-exo-dimethyl bis(methanesulfonate) (6) afforded, together with the correspond ...