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Hint: It is important to sketch the structural formulas for organic compounds because in most of the cases, a molecular formula does not uniquely represent a single organic compound. Different compounds might have the same molecular formula but differ in structural formulas are known as isomers. Hence, sketching the structures may help in easy understanding the chemical and physical properties of each compound.
Complete answer:
When drawing the molecular structures of neutral organic compounds, the following points must be strictly followed.
1.As the valency of a carbon atom is four, so each carbon atom must consist of four bonds in the structure.
2.The valency of a nitrogen atom is three, so each nitrogen atom must consist of three bonds within its structural formula.
3.The valency of the oxygen atom is two, so each oxygen atom must consist of two bonds in the structural formula.
4.The valency of a hydrogen atom is one i.e., it must consist of only one bond within the structural formula of the organic compound.
Hence, the names and the condensed structural formula of the given organic compounds are as follows:
1. Neopentane:
IUPAC name: 2,2-dimethylpropane
2. isohexene:
IUPAC name: 4-methylpent-1-ene
3. Butanoic acid:
IUPAC name: Butanoic acid
4. Propanone:
IUPAC name: propan-2-one
Hence C is the correct option.
Note:
It is important to note that an organic compound can have two names i.e., IUPAC name which is the name which follows an internationally accepted standard rules by international union of pure and applied chemistry whereas the common name are the names which do not have any common rules. As the IUPAC names are difficult to memorize, so generally common names are used to identify a compound.
Complete answer:
When drawing the molecular structures of neutral organic compounds, the following points must be strictly followed.
1.As the valency of a carbon atom is four, so each carbon atom must consist of four bonds in the structure.
2.The valency of a nitrogen atom is three, so each nitrogen atom must consist of three bonds within its structural formula.
3.The valency of the oxygen atom is two, so each oxygen atom must consist of two bonds in the structural formula.
4.The valency of a hydrogen atom is one i.e., it must consist of only one bond within the structural formula of the organic compound.
Hence, the names and the condensed structural formula of the given organic compounds are as follows:
1. Neopentane:
IUPAC name: 2,2-dimethylpropane
2. isohexene:
IUPAC name: 4-methylpent-1-ene
3. Butanoic acid:
IUPAC name: Butanoic acid
4. Propanone:
IUPAC name: propan-2-one
Hence C is the correct option.
Note:
It is important to note that an organic compound can have two names i.e., IUPAC name which is the name which follows an internationally accepted standard rules by international union of pure and applied chemistry whereas the common name are the names which do not have any common rules. As the IUPAC names are difficult to memorize, so generally common names are used to identify a compound.
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