How do you name aromatic compounds?
How do you name aromatic compounds?
In general, to name an aromatic compound, you can follow these steps:
- Identify and name the parent.
- Identify and name the substituents.
- Number the ring to give the substituents the smallest possible number.
- Put the substituents alphabetically followed by the parent name.
How do you name aromatic compounds with multiple substituents?
Alkyl groups are named according to the alkane series convention ending with -yl: methyl (for a single carbon), ethyl (for two carbons), propyl (for three carbons), etc. If the substituent contains more than six carbons, the alkane portion is named first, and the aromatic ring portion is added as a suffix.
How do you name branched benzene?
Simple Benzene Naming The general format for this kind of naming is: (positions of substituents (if >1)- + # (di, tri.) + substituent)n + benzene. For example, chlorine (Cl) attached to a phenyl group would be named chlorobenzene (chloro + benzene).
How do you name aromatic alcohols?
Alcohols are usually named by the first procedure and are designated by an -ol suffix, as in ethanol, CH3CH2OH (note that a locator number is unnecessary on a two-carbon chain). On longer chains the location of the hydroxyl group determines chain numbering. For example: (CH3)2C=CHCH(OH)CH3 is 4-methyl-3-penten-2-ol.
Does methyl or chloro come first?
* In this molecule, the ‘methyl’ and ‘chloro’ groups are not at equivalent positions. Hence ‘methyl’ group is given the lower number according to the rule of first point of difference. * However, the chloro group is written first in the name.
Can aromatic compounds have substituents?
Aromatic molecules with simple alkyl groups as substituents are named as derivatives of benzene. For instance, a benzene with an ethyl group attached to one of the carbons in the ring is simply called “ethylbenzene.”
How will you name organic compounds having multiple substituents?
If there are two or more different substituents they are listed in alphabetical order using the base name (ignore the prefixes). The only prefix which is used when putting the substituents in alphabetical order is iso as in isopropyl or isobutyl.
How do you name phenols with substituents?
In IUPAC nomenclature, the parent molecule is called benzenol, and substituents are always numbered with the OH group being given the understood first position. For the compounds below, the first name listed is the common name and the second is the IUPAC name. Certain phenols are referred to by common names.
How do you name alcohols and phenols?
The IUPAC names of the alcohols are derived by adding the suffix ‘ol’ to the name of the parent alkane. Phenols, on the other hand, are named as hydroxy derivatives of benzene. ‘Phenol’ is used as the parent name rather than benzene.
Is F higher priority than Cl?
The attached atoms are Cl and F, with Cl having the higher atomic number and the higher priority.
Does bromo or chloro take priority?
Chlorine does not have priority. Chlorine and bromine have equal priority in naming. A different rule is operating here: When two groups have equal priority, you number from the end that gives the lowest number at the first point of difference.
What are the rules for aromaticity?
1. Four Key Rules For Aromaticity
- First, it must be cyclic.
- Second, every atom in the ring must be conjugated.
- Third, the molecule must have [4n+2] pi electrons (we’ll explain in depth what that means, below)
- Fourth, the molecule must be flat (usually true if conditions 1-3 are met, but there are rare exceptions)
