Nomenclature aromatic compound

Aromatic Compounds Nomenclature and Structural Formulas 4.20 Write structural formulas for the following compounds ... 

A. NOMENCLATURE AND SELECTED PHYSICAL AND SPECTROSCOPIC PROPERTIES OF POLYCYCLIC AROMATIC HYDROCARBONS (PAHs) AND POLYCYCLIC AROMATIC COMPOUNDS (PACs)... 

SELECTED IUPAC NOMENCLATURE RULES FOR N-ATOM POLYCYCLIC AROMATIC COMPOUNDS... 

Later, D. W., C. W. Wright, K. L. Loening, and J. E. Merritt, Systematic Nomenclature of the Nitrogen, Oxygen, and Sulfur Functional Polycyclic Aromatic Compounds, in Polynuclear Aromatic Hydrocarbons Nomenclature Guide (K. Loening, J. Merritt, D. Later, and W. Wright, Eds.), pp. 27-47, Battelle Press, Columbus, OH, 1990. 

Nomenclature of [m][n]paracyclophane Smith, B. H. Bridged Aromatic Compounds, Academic Press, New York 1964 p. 13... 

Compound nomenclature is abbreviated as follows (number of C in substituent)-(parent aromatic ring)-(isomer number). 

Structure and Nomenclature. The pyridine group consists of a six-membered, heterocyclic, aromatic compound with one nitrogen atom in the ring. The parent compound of this group is pyridine I with ring positions numbered as shown. Alternative denotations of the I. 2, and 4 positions in the ring are alpha, heta, and gamma, respectively. 

To those unfamiliar with the complexities of chemical nomenclature, this lesson may all sound thoroughly confusing, but with a little practice it can be quite easily learned and applied to all types of aromatic compounds. 

Because of the incorporation of beta bonds directly into the nomenclature, for conjugated monocyclic compounds having molecular formula C2nH2n there is no need to add a declaration of odd vs. even in order to distinguish between compounds which are aromatic vs. anti-aromatic namely, when n is odd the compound is aromatic vs. when n is even it is anti-aromatic. This is spelled out directly in the nomenclature The bonds between carbon atoms of a monocyclic aromatic compound have bond order of 1.5 thus the compound is nomenclated by the formula... 

One particular domain in which the alternate method of naming is of significance is that of natural products (perhaps, because of the occurrence of many ring assemblages). Note that this is a domain which, because of the complexity of the IUPAC nomenclature, has opted to formulate its own set of parochial rules of nomenclature, in much the same way as the organic chemistry community formulated IUPAC nomenclature to include 35 "basis" aromatic compounds on which all other "comparable" compounds were to be named [18], This is in contradistinction to various systematic approach, such as a geometry-based proposals for the fusion of benzene modules [19] and for general arenes [20],... 

One of the most significant changes over existing systems is the introduction of a selective use of non-integer bonds directly into the nomenclature. Not only does such an introduction subsume the underlying concepts sometimes expressed as "half-bond" (3 center 2 electron bond) structures in the boranes, as well as "bond and a half (Robinson) ring structures in aromatic compounds, etc., but also this approach points the way... 

Naphthalene is an aromatic compound that may be substituted with up to eight substituents. The numbering of the naphthalene nucleus is shown in Fig. 2. In older literature the 1- and 2-positions were named a- and /1-position, respectively, and this nomenclature is still used to some extent. 

Aromatic" compounds are those derived from benzene and similar ring systems. As with aliphatic nomenclature described above, the process is determining the root name of the parent ring determining priority, name, and position number of substituents and assembling the name in alphabetical order. Functional group priorities are the same in aliphatic and aromatic nomenclature. See p. 676 for the list of priorities. 

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