Newman projection

If one looks down the axis of the C - C bond, one will see the so-called Newman projection.

In addition, the Newman projection - which allows organic chemists to represent different conformations of molecules in space - was introduced by the chemist.

The Newman projection and the sawhorse projection are used to depict specific conformers or to distinguish vicinal stereochemistry.

In the example of ethane in Newman projection it shows that rotation around the carbon-carbon bond is not entirely free but that an energy barrier exists.

To visualize the dihedral angle of four atoms, it's helpful to look down the second bond vector (Figure 3), which is equivalent to the Newman projection in chemistry.

For some molecules such as those of n-butane, there can be special versions of staggered conformations called gauche and anti; see first Newman projection diagram in Conformational isomerism.

In the Newman projection, a circle is used to represent a plane perpendicular to the bond, distinguishing the substituents on the front carbon from the substituents on the back carbon.

The only difference is a slightly different perspective: the Newman projection looking straight down the bond of interest, the sawhorse projection looking at the same bond but from a somewhat oblique vantage point.

In newman projection it can be seen how the steric bulks of chromium groups and the steric bulks of the alkyl and halogen groups drive this reaction towards anti elimination.

This Newman projection illustrates the Cornforth and Felkin transition state that places the EWG anti- to the incoming nucleophile, regardless of its steric bulk relative to R and R.

A Newman projection, useful in alkane stereochemistry, visualizes chemical conformations of a carbon-carbon chemical bond from front to back, with the front carbon represented by a dot and the back carbon as a circle (see below).

In the example of staggered ethane in Newman projection, a hydrogen atom on one carbon atom has a 60 torsional angle or torsion angle with respect to the nearest hydrogen atom on the other carbon so that steric hindrance is minimised.