Organic chemistry topic conformation of stereochemistry

Organic chemistry topic conformation of stereochemistry.

Stereochemistry is the branch of chemistry that studies the three-dimensional arrangement of atoms within molecules and the effect of this arrangement on the chemical and physical properties of compounds. It focuses on the spatial arrangement of atoms or groups around a central atom and their relationships to one another.

 Conformation- The carbon carbon single bond in alkanes is formed when a sp3 hybrid orbital of 1 carbon atoms overlaps with a sp3 hybrid orbitals of another carbon atom. As,a result atoms involved in as single bonds can rotate about the axis of the bond i.e. free rotation of single bond. 

Sawhorse projection- in this projection the molecule is viewed along the axis of the model form an oblique angle. The central C-C bond is drawn as a straight line slightly titlted.

Newman projection- it is asimple method to represent the conformation.In this method, the 2C-C bond forming the sigma bond and are represented by 2 circles. The front carbon atom is shown by a point whereas the carbon further from the eye is represented by the circle. 

2 conformations are possible 

1.STAGGERED CONFORMATION

2. ECLIPSED CONFORMATION

Staggered conformation- in this arrangement, the hydrogens of 2 carbon atoms are staggered with respect to one another. As a result they are at maximum distance apart and have minimum repulsion between them.

Eclipsed conformation- in this conformation the 2 hydrogen of 1 carbon are directly behind those of the other. Hence the repulsion in these atoms is maximum.

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