Pseudorotation
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The IUPAC defines pseudorotation as "a conformational change resulting in a structure that appears to have been produced by rotation of the entire initial molecule and is superimposable on the initial one, unless different positions are distinguished by substitution or isotopic labeling. No angular momentum is generated by this motion; this is the reason for the term." Formally it refers to symmetrical molecules, although the mechanism is invoked for low-symmetry spec...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The IUPAC defines pseudorotation as "a conformational change resulting in a structure that appears to have been produced by rotation of the entire initial molecule and is superimposable on the initial one, unless different positions are distinguished by substitution or isotopic labeling. No angular momentum is generated by this motion; this is the reason for the term." Formally it refers to symmetrical molecules, although the mechanism is invoked for low-symmetry species also. A small displacement of the atomic positions leads to a loss of symmetry until the symmetric product forms. Although not formally required, pseudorotation normally involves displacements along low-energy pathways.
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