The most common stereocenters are chiral centers (such as asymmetric carbon atoms) and the double-bonded carbon atoms in cis-trans alkenes. A chiral center consists of an atom holding a set of ligands (atoms or groups of atoms) in a spatial arrangement which is not superposable on its mirror image.ost chiral molecules have a chiral carbon, though the presence of a chiral carbon does not necessarily make a molecule chiral (see meso compound). A chiral carbon is often denoted by C*. If the carbon is chiral, it follows that: 1  the carbon atom is sp 3 -hybridized;
Past the inca tunnel, a gentle climb will take you to the third pass at 12139 feet above sea level (3700 masl), offering incredible views of several snow capped peaks including Salkantay (20574 ft./6271m) and Veronica (18865 ft./5750m).
Once they finished their farewells to the friends and family they might never see again, it was time for the tough part â surviving a 2,000 mile journey. The Oregon Trail started in Independence, Missouri and ended in Oregon City. This trail system wasnât just a 19 th century superhighway where people covered about 15 miles a day â it remains the nationâs longest graveyard. From the first wagon train in 1836 to the time when steam trains became the preferred method of travel, emigrants buried 65,000 of their friends and relatives along the road.