Newman Projection Definition:
A drawing style that is used to visualize the conformations of a molecule.
Newman Projection Explained:
The Newman projection is designed to show the confirmations/ different positions of a molecule. These conformations result from rotation along the C-C single bonds which become bent or twisted. Due to the movement, some confirmations are high in energy while others are low in energy. A molecule, however, always prefers the low strain low energy conformation.
The 2 main structures under the Newman projection is the staggered structure and the ellipsed structure.
- In the staggered structure, the atoms are more evenly spaced out. This reduces repulsion between the atoms and the molecule attains a state of low energy and low strain.
- In the eclipsed structure, the spacing is not so even and there is a high degree of repulsion between the atoms. This is the high strain high energy state of the molecule. Molecules seldom remain in this state.
Example – Drawing the Newman Projection for Ethane.
Other Examples –