Chiral molecules such as proteins crystallize in chiral point groups. Chiral alkylborohydrides are accessible through the diastereoselective hydroboration of chiral alkenes. Chiral discotic phases, similar to the chiral nematic phase, are also known. Knowles replaced the achiral triphenylphosphine ligands in Wilkinson's catalyst with chiral phosphine ligands. Gas chromatography with columns having a chiral stationary phase allows analyzing mixtures of enantiomers. Chiral chromatography involves the separation of stereoisomers. An interesting recent observation is of the formation of chiral mesophases from achiral LC molecules. The two enantiomers have the same chemical properties, except when reacting with other chiral compounds. Asymmetric Kumada couplings can be effected through the use of chiral ligands. Enzymes, which are chiral, often distinguish between the two enantiomers of a chiral substrate. THP ethers derived from chiral alcohols form diastereomers. Helical and other symmetries of chiral nanomaterials were also obtained. The different epimers can be distinguished using chiral column chromatography. In the case of chiral allylic alcohols, kinetic resolution results. Many electrophiles are chiral and optically stable.