conformation
Formation - spatial arrangement of atoms in a chemical molecule that can undergo changes by turning around individual chemical bonds, ie without breaking them. The ability to accept different conformations by molecules can be imagined as an example of a change in the shape of a normal metal chain. The chain can be, for example, straightened, rolled into a ball, or even looped without having to break and reassemble its individual links. Molecules that have the same bond and atoms but differ in shape are called conformational isomers or conformers. Chemical molecules change their shape as a result of rotation around the chemical bonds of their atomic groups relative to other atomic groups. This rotation is only possible around single bonds and is locked in case of multiple bonds. It may also be blocked by the so-called. Steric hindrance, that is, the large size of groups of atoms, that they can not rotate with each other, because it would overlap individual atoms in space.