(S)-1,2-Dimethyl-1,1,2-triphenyl-2-(4-piperidiniomethyl)disilane chloride

(S)-1,2-Dimethyl-1,1,2-triphenyl-2-(4-piperidiniometh­yl)disilane chloride

The title compound, C(26)H(34)NSi(2) (+)·Cl(-), shows chirality at silicon. Because of its highly selective synthesis with an e.r. of >99:1 by means of a racemic resolution with mandelic acid, the free disilane is of great importance to the chemistry of highly enanti-omerically enriched lithio-silanes and their trapping products. N-H⋯Cl hydrogen bonding is present between the protonated nitro-g...

NITROIMIDAZOLES IV [I]. SYNTHESIS OF 3,s-DICARBO ALKOXY-2,6-DIMETHYL-4-(1 -METHYL-5- NITRO-2-1MIDAZOLYL)-1,4-DIHYDROPYRIDIANNE D 3,5-DICARBOALKOXY- 2,6-DIMETHYL-4(-2 -S UBSTI - TUTED-4-THIAZOLYL)-l , 4- DIHYDROPYRIDINE

Different procedures for the syntheses of the title compounds were investigated. The best method for the preparation of the title compounds were the reaction of the readily available 2-formyL-1-methyl-5-nitroimidazole2- substituted-4-formylthiazoles with alkyl acetoacetate and alkyl aminocrotonate in boiling alcohol.

2-(4-Fluoro­phen­yl)-1,4,5-triphenyl-1H-imidazole

In the title mol-ecule, C(27)H(19)FN(2), the imidazole ring is essentially planar [maximum deviation = 0.004 (1) Å] and makes dihedral angles of 62.80 (6), 36.98 (6), 33.16 (6) and 46.24 (6)°, respectively, with the substituent rings in the 1-, 2-, 4- and 5-positions. No classical hydrogen bonds are observed in the crystal structure.

Dimethyl Carbonate PERP 2012 S 12 Report

Bis{4-[(3,5-dimethyl-1H-pyrazol-4-yl)selan­yl]-3,5-dimethyl-1H-pyrazol-2-ium} chloride monohydrate

In the title compound, 2C(10)H(15)N(4)Se(+)·Cl(-)·OH(-), a singly protonated mol-ecule of the organic selenide participates in hydrogen bonding with neighboring mol-ecules, forming zigzag chains along [001]. The molecule adapts a cis bridging mode with a C-Se-C angle of 102.13 (15)°. π-π stacking inter-actions are observed between the closest pyrazole rings of neighboring chains [centroid-centr...