https://doi.org/10.1351/goldbook.A00547
Term used to refer to @[email protected] resulting from the non-planar arrangement of four groups in pairs about a @[email protected] It is exemplified by @[email protected] (or ) and by the @[email protected] of ortho-substituted biphenyls. The @[email protected] in molecular entities possessing axial @[email protected] is specified by the stereodescriptors Ra and Sa (or by P or M).
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