newman's representation and sawhorse representation of Ethane
Answers
1) Newman Projection Formule -: Newman devised a simple and highly useful method of representing three dimensional formule on paper. After his name, these are called Newman Projections. These Projection formulae are obtained by viewing the molecule along the bond joining the two carbon atoms. The carbon atom near the eye is represented by a point and the three atoms or groups attached to it by three equally spaced (120°) radii. The carbon atom farther from the eye is designated by a circle and the three atoms or groups attached to it by three equally spaced radial extensions. The Newman Projections for staggered, eclipsed and skew confirmations of ethane.
2) Sawhorse Formulae :- This is a simple method of representing three dimensional formule on paper. The molecule is viewed slightly from above and from the right and projected on the paper. The bond between the two carbon atoms is drawn diagonally and is slightly elongated for clarity. The lower left hand carbon is considered to be towards the front and the upper right hand carbon towards the back. The Sawhorse representation for staggered and eclipsed confirmations of ethane.
