Molecular representation fisher projection chiral center

no. of chiral centers in

If the circles represent molecules , which diagram provides the best molecular level representation of a pure solid in the process of melting?

R & S configration || pseudo chiral center

Draw Fischer projection formulas for the following moelcules: Strategy: By convention, Fisher projections are written with the main carbon chain extending from top to bottom and with all groups esliped. in the Fischer formula, the chiral carbon is not drawm, it is at the crossing of a horizontal and a vertical line. The horizontal lines represent bonds that project out of the plane of the paper, towards the viewer, and the vertical lines represent bonds that project behind the plane of the paper, away form the viewer

The given diagrammatic representation shows one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one blank component "X" in it :

How many representations of lactic acid are possible in Fischer projection (d & l) ?

Plane polarised light & optical activity|Molecular Asymmetry & chirality of objects |Chiral or Asymmetric centre|Enantiomers

R,S-configuration is a useful tool for determination of enantiomers, diasteromers and homomers. If configuration of all chiral centers are opposite then structures are enantiomers, if all chiral centers have same configuration then they are homomers and if some have same confguration and some have opposite configuration then they are diastereomers. Among above structures find out enantiomeric structures: