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). The front carbon atom is called proximal, while the back atom is called distal. This type of representation is useful for assessing the torsional angle between bonds.
A Sawhorse representation, on the other hand, views a carbon-carbon bond from an oblique angle. This type of representation makes it easy to visualize the molecule as a whole in 3-D.
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 Ohio State University who introduced it in 1952.
Famous quotes containing the words newman and/or projection:
“This is what the Church is said to want, not party men, but sensible, temperate, sober, well-judging persons, to guide it through the channel of no-meaning, between the Scylla and Charybdis of Aye and No.”
—Cardinal John Henry Newman (1801–1890)
“In the case of our main stock of well-worn predicates, I submit that the judgment of projectibility has derived from the habitual projection, rather than the habitual projection from the judgment of projectibility. The reason why only the right predicates happen so luckily to have become well entrenched is just that the well entrenched predicates have thereby become the right ones.”
—Nelson Goodman (b. 1906)