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Aliphatic compounds can be saturated, joined by single bonds (), or unsaturated, with double bonds or triple bonds ().If other elements (heteroatoms) are bound to the carbon chain, the most common being oxygen, nitrogen, sulfur, and chlorine, it is no longer a hydrocarbon, and therefore no longer an aliphatic compound.
For aliphatic compounds this is sometimes called the Finkelstein reaction, while for aromatic compounds it is known as the Halex process. R 3 CCl + MF → R 3 CF + MCl (M = Na, K, Cs) Alkyl monofluorides can be obtained from alcohols and Olah reagent (pyridinium fluoride) or another fluoridating agents.
Aromatization is a chemical reaction in which an aromatic system is formed from a single nonaromatic precursor. Typically aromatization is achieved by dehydrogenation of existing cyclic compounds, illustrated by the conversion of cyclohexane into benzene. Aromatization includes the formation of heterocyclic systems. [1]
Heteroarenes are aromatic compounds, where at least one methine or vinylene (-C= or -CH=CH-) group is replaced by a heteroatom: oxygen, nitrogen, or sulfur. [3] Examples of non-benzene compounds with aromatic properties are furan, a heterocyclic compound with a five-membered ring that includes a single oxygen atom, and pyridine, a heterocyclic compound with a six-membered ring containing one ...
Substitution reactions in organic chemistry are classified either as electrophilic or nucleophilic depending upon the reagent involved, whether a reactive intermediate involved in the reaction is a carbocation, a carbanion or a free radical, and whether the substrate is aliphatic or aromatic. Detailed understanding of a reaction type helps to ...
Aziridine is an organic compound consisting of the three-membered heterocycle C 2 H 5 N. [5] [6] It is a colorless, toxic, volatile liquid that is of significant practical interest. [7] Aziridine was discovered in 1888 by the chemist Siegmund Gabriel. [8] Its derivatives, also referred to as aziridines, are of broader interest in medicinal ...
In organic chemistry, an aromatic amine is an organic compound consisting of an aromatic ring attached to an amine. It is a broad class of compounds that encompasses anilines, but also many more complex aromatic rings and many amine substituents beyond NH 2. Such compounds occur widely. [1]
These cause a downfield shift of approximately 2–4 ppm for H atoms on C α (an aliphatic C atom directly bonded to the substituent in question) and of less than 1–2 ppm for H atoms on C β (an aliphatic C atom bonded to C α). Carbonyl groups, olefinic fragments and aromatic rings contribute sp 2 hybridized
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