Question

What is Aldehyde? Write the IUPAC names and formula of the first three members of this series.

Answer 1

Hint : To know about the Aldehyde, we should follow or go through the whole concept and mechanism of the Aldehyde. Basically it is created by removing hydrogen from an alcohol. And, then we will discuss briefly, the first three members of this series.

Complete Step By Step Answer:
Aldehydes, which are generally created by removing a hydrogen from an alcohol, are common in organic chemistry; the most well-known is formaldehyde. As they are frequently strongly scented, many fragrances are or contain aldehydes.
Or, in other words, the organic compounds in which the $ - C - H $ group is present are included in the Aldehyde homologous series. The common/general formula of this series is $ {C_n}{H_{2n}} $ where $ n $ is the number of carbon atoms.
For IUPAC nomenclature the suffix ‘e’ is substituted by $ - al $ of relative alkane.
The first three members of this series are as follows:
(i) Methane: is the first member of this series, whose IUPAC name is “Methanal”. And the formula of this aldehyde is $ HCHO $ .
(ii) Ethane: is the second member of this series, whose IUPAC name is “Ethanal”. And the formula of this aldehyde is $ C{H_3}CHO $ .
(iii) Propane: is the third member of this series, whose IUPAC name is “Propnal”. And the formula of this aldehyde is $ C{H_3}C{H_2}CHO $ .

Note :
Structure of aldehydes: In formaldehyde, the simplest aldehyde, the carbonyl group is bonded to two hydrogen atoms. In all other aldehydes, the carbonyl group is bonded to one hydrogen and one carbon group.