Chirality associated with the arrangement of substituents relative to a plane, as in an unsymmetrically substituted coordinated cyclopentadienyl ring. Two planar-chiral coordination ligands can give a meso arrangement and a pair of enantiomeric arrangements.
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Planar chirality refers to a type of spatial arrangement in certain molecules where the chirality arises from the planar structure of the molecule rather than from a chiral center (usually a carbon atom bonded to four different groups). In planar chirality, the different arrangements around a plane can lead to non-superimposable mirror images, typically as a result of the spatial arrangement of groups around a rigid planar structure, such as a cyclic compound or a flat molecular scaffold.