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Aryl groups are aromatic compounds and have -I effect whereas alkyl groups are mom aromatic compounds with +I effect
The reason is that the aryl group is able to stabalize the diazonium salt through resonance, while the alkyl group may not be resonance stabalized.
Webster's new world dictionary defines ethereal as: adj. 1. very light; airy; delicate 2. not earthly; heavenly
An arylalkylamine is a secondary or tertiary amine which has both an alkyl and an aryl group connected to the nitrogen atom.
There are many types of hydrocarbons including alkanes, alkenes, alkynes, aryl compounds, cyclic compounds etc.
An aralkyl is a univalent radical derived from an alkyl radical by replacing one or more hydrogen atoms by aryl groups.
R = aryl or alkyl group. O = Oxygen, C = Carbon, H = Hydrogen. With that said: R-COOH Indicates an aryl/alkyl bound to a carbon, bound to two oxygens and one oxygen is bound to a hydrogen. If you complete their valence shells you get. R-C=O | O-H
when two similar alkyl or aryl groups are attached to carbonyl carbons then it is a symmetrical ketone..... as CH3-CO-CH3 or C6H5-CO-C6H5
Molecules containing carbon-metal linkage; a compound containing an alkyl or aryl radical bonded to a metal, such as tetraethyllead, Pb(C2H5)4
Amines are produced when a hydrogen atom in ammonia has been replaced by an alkyl or aryl group. Examples of amines are biogenic amines, amino acids and aniline.
Metal alkyls undergo beta-hydride elimination (the most facile decomposition pathway) which is not usually possible in metal aryls.
The aryl group is basically an abbreviation for an Aromatic group lake a hydrogen and also binding to a molecule (at where the H+atom is removed). It is like an Alkyl group but instead of an Alkan (aliphatic side chain of hydrocarbon) there is an aromatic group. So the structure of Aryl group is a side chain containing one or more aromatic group. I am just a pharmacy student I hope that I made it clear enough for you.