Question

draw the structural isomers for the molecular formula c4h9br


Draw all the structural isomers for the molecular

Draw all the structural isomers for the molecular formula C4H9Br. Be careful not to draw any structures b crossing one line over another; the system needs to know where you intend connections to be between atoms.  

You have drawn a H3C-Br molecule crossing over top of a H3C-CH3 molecule. Be sure to draw the connections between atoms.

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Concepts and reason

In organic chemistry the relationship between a pair of compounds can be explained by isomerism and the compounds having same molecular formula but different arrangement of atoms in chemical structure is called isomers. There are two types of isomers, stereoisomers and constitutional isomers.

Fundamentals

Isomers are the compounds having same molecular formula, but differ in their structural arrangement and spatial arrangement of atoms.

Isomerism:

Isomerism is kind of relationship that exist between pair of compounds having same molecular formula. In this, pair of compounds may have different physical and chemical properties and differs in the rotation of plane polarized light in polarimeter. Isomerism mainly divided into structural (or constitutional) and stereoisomers.

Constitutional Isomers: Two compounds with same molecular formula but different connectivity of atoms.

Stereoisomers: Two compounds with same molecular formula but the orientation of atoms are different in space.

There are 4 carbon atoms, 9 hydrogen atoms and 1 bromine atom present in the molecular formula C4H9Br{{\rm{C}}_{\rm{4}}}{{\rm{H}}_{\rm{9}}}{\rm{Br}} .

There are two possible carbon chains which are having 4 carbon atoms as given below:

I. 4-membered longest carbon chain:

1.1-bromobutane

2.2-bromobutane

II. 3-membered longest carbon chain with methyl substituent.

3.1-bromo-2-methylpropane

4.2-bromo-2-methylpropane

Ans:

The possible structural isomers for C4H9Br{{\rm{C}}_{\rm{4}}}{{\rm{H}}_{\rm{9}}}{\rm{Br}} are as follows:

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