Newman projection
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Main article: conformational isomerism
The Newman projection is a way to draw chemical conformations and views a carbon carbon chemical bond from front to back, front carbon as a dot and back carbon as a circle. This type of representation makes it easy to assess the torsional angle between two bonds one at each carbon atom. The Sawhorse representation views a C-C bond from an oblique angle.
The atom nearer to the observer is called proximal and the one further away is called distal. The Newman projection is encountered in alkane stereochemistry.
| Molecule of butane in syn-clinal (-sc) conformation | |
 |
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| sawhorse projection |
Newman projection |
Other methods for depicting molecules are the Fischer projection, the Haworth projection and the Natta projection.
This projection is named after Melvin Spencer Newman,an American chemist of the Ohio State University who introduced it in 1952.
[edit] References
- Newman, M. S. Record. Chem. Progr. (Kresge-Hooker Sci. Lib.) 1952, 13, 111.
- Newman, M. S. A notation for the study of certain stereochemical problems. J. Chem. Educ. 1955, 32, 344-347.
