For example, a substituted benzoic acid is composed of three parts,the functional group,the substituent, and the benzene ring.what do we call the benzene ring, or the general structure that has the same rule as the benzene ring in the substituted benzoic acid ? Skeleton? Molecular skeleton?or a standard name other than the two?
Dear Rina,
In the case of substituted benzoic acid, the skeleton is benzoic acid moiety.
The following text might help in understanding skeleton structure:
The skeletal structure of an organic compound is the series of atoms bonded together that form the essential structure of the compound. The skeleton can consist of chains, branches and/or rings of bonded atoms. Skeletal atoms other than carbon or hydrogen are called "heteroatoms".[2]
The skeleton has hydrogen and/or various substituents bonded to its atoms. Hydrogen is the most common non-carbon atom that is bonded to carbon and, for simplicity, is not explicitly drawn. In addition, carbon atoms are not generally labelled as such directly (i.e. with a "C"), whereas heteroatoms are always explicitly noted as such (i.e. using "N" fornitrogen, "O" for oxygen, etc.)
Heteroatoms and other groups of atoms that give rise to relatively high rates of chemical reactivity, or introduce specific and interesting characteristics in the spectra of compounds are called functional groups, as they give the molecule a function. Heteroatoms and functional groups are known collectively as "substituents", as they are considered to be a substitute for the hydrogen atom that would be present in the parent hydrocarbon of the organic compound in question.
Hoping this will be helpful,
Rafik
I think understanding your problem! The nomenclature rules of organic compounds, incluind displaced aromatic compounds as benzoic acid, are available in IUPAC site.
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