A @[email protected] in which the change in bond directions to a three-coordinate @[email protected] having a pyramidal arrangement of bonds (tripodal arrangement) causes the @[email protected] (@[email protected] of the pyramid) to appear to move to an equivalent position on the other side of the base of the pyramid. If the three @[email protected] to the @[email protected] are different pyramidal @[email protected] interconverts @[email protected]
PAC, 1996, 68, 2193. (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2215 [Terms] [Paper]