Suffix carbaldehyde

When a formyl group (—CH=0) is attached to a nng the ring name is followed by the suffix carbaldehyde... 

When the aldehyde group is directly attached to a carbon atom of a ring system, the suffix -carbaldehyde is added to the name of the ring system, e.g., 2-naphthalenecarbaldehyde. When the aldehyde group is separated from the ring by a chain of carbon atoms, the compound is named (1) as a derivative of the acyclic system or (2) by conjunctive nomenclature, for example, (1) (2-naphthyl)propionaldehyde or (2) 2-naphthalenepropionaldehyde. 

Common names for simple aldehydes are frequently encountered. These common names are derived from the common names for the related carboxylic acid (see Section 12.4) by replacing the suffix -ic acid with the suffix -aldehyde. Thus, the aldehyde related to acetic acid is acetaldehyde. If the carbonyl group of an aldehyde is attached to a ring system, the compound can be named as a hydrocarbon with the suffix -carbaldehyde. (Some sources use -carboxaldehyde.)... 

Methylcyclopentanecarbaldehyde (The suffix -carbaldehyde indicates that the —CHO group is attached to the parent ring.)... 

Systematic names for aldehydes are derived by replacing the final -e of the alkane name with -al. An aldehyde carbon is at the end of a chain, so it is number 1. If the aldehyde group is a substituent of a large unit (usually a ring), the suffix carbaldehyde is used. 

Remember that the principal chain must contain the aldehyde or ketone group and that an aldehyde group occurs only at the end of a chain. The aldehyde carbon is carbon 1 in an acyclic compound, and the suffix -carbaldehyde is used when the aldehyde group is attached to a ring. 

For more complex aldehydes in which the -CHO group is attached a ring, the suffix -carbaldehyde is used ... 

Special case When the chain cannot include the carbon of the aldehyde, the suffix "carbaldehyde" is used 9 o... 

A CHO group bonded to a ring is indicated by the suffix -carbaldehyde. 

Notice from the last two examples that an aldehyde group has priority over a double bond or a hydroxyl group, not only in numbering but also as the suffix. For cyclic aldehydes, the suffix -carbaldehyde is used. Aromatic aldehydes often have common names ... 

For cyclic molecules in which —CHO is bonded directly to the ring, the molecule is named by adding the suffix -carbaldehyde to the name of the ring. The atom of the ring to which the aldehyde group is bonded is numbered 1. 

To name an aldehyde with the CHO bonded to a ring [1] Name the ring and add the suffix -carbaldehyde. [2] Number the ring to put the CHO group at Cl, but omit this number from the name. Apply all other nomenclature rules. 

If an aldehyde group is attached to a ring, use the suffix -carbaldehyde. 

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