Anagram & Information om | Engelska ordet GEMINAL

Exempel på hur man kan använda GEMINAL i en mening

• A geminal dihalide exposed to organolithiums can undergo metal-halogen exchange and then eliminate a lithium salt to give a carbene, and zinc metal abstracts halogens similarly in the Simmons–Smith reaction.
• Under Wurtz conditions, vicinal dihalides yield alkenes, whereas geminal dihalides convert to alkynes.
• For nucleophilic substitution, such resistance is known when there is substantial steric hindrance at or around the leaving group, or if there is a geminal substituent destabilizing an accumulation of positive charge.
• A geminal diol (or gem-diol for short) is any organic compound having two hydroxyl functional groups (-OH) bound to the same carbon atom.
• These can be reduced to cyclopropanes or hydrolysed to give cyclopropanones by a geminal halide hydrolysis.
• For example, in the presence of water, the carbonyl rapidly converts to a geminal diol (described as the "monohydrate").
• The Skattebøl rearrangement is an organic reaction for converting a geminal dihalo cyclopropane to an allene using an organolithium base.
• DAST converts alcohols to the corresponding alkyl fluorides as well as aldehydes and unhindered ketones to geminal difluorides.
• According to X-ray diffraction analysis, the reagent traded under the name "cyclohexanehexone octahydrate" or equivalent names is actually dodecahydroxycyclohexane dihydrate—the geminal diol derivative of the six ketone groups with an additional two molecules of water—a solid that decomposes at 95 °C.
• Hydrolytic and thermal stability: The geminal dimethyl group and the sulfomethyl group combine to sterically hinder the amide functionality and provide both hydrolytic and thermal stabilities to AMPS-containing polymers.
• In solution, the acid and the hydrogen rhodizonate ion are mostly hydrated, with some of the carbonyl groups >C=O replaced by geminal hydroxyls,.
• Ghirotti discussed the obstetrical issues which were mentioned in the Frari's textbook, such as symphisiotomy, pelvic/fetal head diameters, fetal/maternal auscultation, geminal and extra-uterine pregnancy, mola, menstrual cycles, anatomical variations of the uterus, maternal alimentation, infertility, and death in utero.
• Similar to monohalo ketones, geminal dihalo ketones initially form metal enolates upon exposure to one- or two-electron reducing agents.
• Phase-transfer catalyst in geminal di-alkylation of fluorene, N,N-dialkylation of aniline and N-alkylation of carbazole using aqueous sodium hydroxide and alkyl halides.
• If the two geminal substituents are both aromatic rings with different substituents tuning the electron density, the differentiation of the facial selectivity is also facile where the dienophile approaches the diene anti to the more electron-rich C–C bond where the stereoelectronic effect, in this case, is similar to the previous one.
• As illustrated by the behavior of the smallest member, glyoxylic acid, semialdehydes often exist as hydrates (geminal diols).
• Examples include geminal disubstituted alkanes, such as 1,1-dichloroethane being known as ethylidene dichloride (compare 1,2-dichloroethane's common name of ethylene dichloride); and cyclic ketals such as solketal and Meldrum's acid, also known respectively as isopropylidene glycerol and isopropylidene malonate.

Förberedelsen av sidan tog: 399,77 ms.