Prefixes phenyl

The name found its origin in the fact that the first dyes known were all derived from quinoline as, for example, 2,2 -cyanine (Scheme 1). In the case of an asymmetrical or symmetrical dye involving one or two nuclei that are different from the quinoline ring, the name of the nucleus becomes the prefix in the name of the dye. So 3.3 -dimethyl-4-phenyl thiazolo cyanine is the dye of structure 1 and 3.1 -dimethyl 4-phenyl thiazolo 2 -cyanine is represented by the formula structure 2 (Scheme 2). 

Carbonates are indexed in Chemicaly hstracts under carbonic acid, esters. Symmetrical diesters have the prefix di or bis. Unsymmetrical diesters are listed with the two radicals following each other. For example, ethyl phenyl carbonic diester is C2H OCOOC H. Table 6 Hsts commonly used carbonates, their Chemicaly hstracts Service Registry Number, and formulas. 

Note. The alternative name using a substituent prefix (see 2-Carb-35.1) is 2-amino-1,2-N-carbonyl- 1,2-dideoxy-1 -/V-phenyl-a-D-glucopyranosylamine... 

Assemblies of identical rings are named by using a unique set of multiplicative prefixes, bi-, ter-, quater-, etc., to indicate the number of rings. The name phenyl is used instead of benzene for the aromatic C5 ring. 

As exceptions, unbranched assemblies consisting of benzene rings are named by using the appropriate prefix with the radical name phenyl . 

Substituted aromatic compounds are named using the suffix -benzene. Thus, C6H5Br is bromobenzene, C6H5CH3 is methylbenzene (also called toluene), C6H5N02 is nitrobenzene, and so on. Disubstituted aromatic compounds are named using one of the prefixes ortho-, meta-, or para-. An ortho- or o-disubstituted benzene has its two substituents in a 1,2 relationship on the ring a meta- or m-disubstituted benzene has its two substituents in a 1,3 relationship and a para- or p-disubstituted benzene has its substituents in a 1,4 relationship. When the benzene ring itself is a substituent, the name phenyl (pronounced fen-nil) is used. 

In naming unsymmetrical azoxy compounds, the prefixes NNO- or ONN- are used to indicate the position of the oxygen atom, e.g., Ph-N(0)=N-CioH7 = phenyl-OAW-azoxynaphthalene. However, post-2006, such azoxy compounds are named in CAS as (1-oxidodiazenyl) or (2-oxidodiazenyl). 

The prefix for benzene is phenyl. Benzene with a CH2 group is benzyl. 

Fig. 5.1. Examples of aliphatic and aromatic compounds. A. An isoprene group, which is an aliphatic group. The iso prefix denotes branching, and the ene denotes a double bond. B. A benzene ring (or phenyl group), which is an aromatic group.

Three phenyl groups replace three hydrogens on three borons. The oxygens have no hydrogens to be replaced, therefore the use of the B-prefix to indicate that the phenyl groups are on the borons is not necessary. Its name is triphenylboroxine. 

Phenyl glycosides with different sterochemistry than glucose are denoted by the three letter prefix. 

Aromatic structures can also appear as substituents on the hydrocarbon chains. We then use special prefixes in their nomenclature. For instance, the C6H5 group is named phenyl and the C6H5CH2 group is called benzyl as is shown in the next scheme. 

Separation Technologies Inc., of Whippany, NJ, USA. In 1991, the same company received two global patents for the use of two specific cyclodextrin derivatives for the separation of enantiomers by capillary GC. This technology is known by the trade name of Chiraldex. Various Chiraldex columns have been developed, using the prefixes A, B and G for the a-, and y-CDs, respectively [92], Similarly, Supelco have also developed various chiral stationary phases under the trade name of Dex a-Dex, S-Dex and y-Dex CSPs on fused silica capillary columns containing premethylated a-, and y-CDs coupled to a phenyl that contains a stationary polysiloxane... 

Substituted benzenes are named by adding prefixes or suffixes to the word benzene. Disubstituted systems are labeled as 1,2-, 1,3-, and 1,4- or ortho, meta, and para, depending on the location of the substituents. Many benzene derivatives have common names, sometimes used as bases for naming their substituted analogs. As a substituent, an aromatic system is called aryl the parent aryl substituent, CsHs, is called phenyl its homolog C6H5CH2 is named phenylmethyl (benzyl). 

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