pseudorotationn.

Brit.

/ˌs(j)uːdə(ʊ)rə(ʊ)ˈteɪʃn/, U.S.

/ˈˌsudoʊˌroʊˈteɪʃ(ə)n/

Origin: Formed within English, by compounding. Etymons: pseudo- comb. form, rotation n.

Etymology: < pseudo- comb. form + rotation n. Compare later pseudorotate v.

Chemistry.

A change in molecular configuration involving concerted displacements of the constituent atoms, which is equivalent to a rotation of the molecule (in some cases coupled with an interchange of some of the constituents), but does not involve any actual rotation of the molecule.

ΘΚΠ

the world > matter > chemistry > chemical structure or stereochemistry > [noun] > configuration > changes in > pseudorotation

pseudorotation1947

1947 J. E. Kilpatrick et al. in Jrnl. Amer. Chem. Soc. 69 2485/2 (caption) Pseudo-rotation of ring puckering in cyclopentane.

1960 Jrnl. Chem. Physics 32 937/1 One..attractive mechanism for the exchange process in PF₅ and PCl₅ is a purely internal pseudorotation.

1987 A. Nickon & E. F. Silversmith Org. Chem.: Name Game vii. 99 During this continuous rippling, the carbons in swift succession take turns poking out of plane, so that the blips appear to rotate location (hence the designation, pseudorotation).

2002 Jrnl. Organometallic Chem. 646 204/2 There are ten possible configurations, which can be linked by 11 Berry pseudorotations.

Derivatives

pseudoroˈtational adj.

ΘΚΠ

the world > matter > chemistry > chemical structure or stereochemistry > [adjective] > of or relating to configuration > of or relating to changes in > of or relating to pseudorotation

pseudorotational1959

1959 Jrnl. Amer. Chem. Soc. 81 5884 In common with other saturated molecules with five-membered rings, the pyrrolidine molecule has a ‘pseudorotational’ degree of freedom.

1990 Nucleic Acids Res. 18 278/1 Pseudorotational analysis of the furanose ring based on the ¹H-¹H coupling constants.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	pseudorotation
释义	pseudorotationn. Brit. /ˌs(j)uːdə(ʊ)rə(ʊ)ˈteɪʃn/, U.S. /ˈˌsudoʊˌroʊˈteɪʃ(ə)n/ Origin: Formed within English, by compounding. Etymons: pseudo- comb. form, rotation n. Etymology: < pseudo- comb. form + rotation n. Compare later pseudorotate v. Chemistry. A change in molecular configuration involving concerted displacements of the constituent atoms, which is equivalent to a rotation of the molecule (in some cases coupled with an interchange of some of the constituents), but does not involve any actual rotation of the molecule. ΘΚΠ the world > matter > chemistry > chemical structure or stereochemistry > [noun] > configuration > changes in > pseudorotation pseudorotation1947 1947 J. E. Kilpatrick et al. in Jrnl. Amer. Chem. Soc. 69 2485/2 (caption) Pseudo-rotation of ring puckering in cyclopentane. 1960 Jrnl. Chem. Physics 32 937/1 One..attractive mechanism for the exchange process in PF₅ and PCl₅ is a purely internal pseudorotation. 1987 A. Nickon & E. F. Silversmith Org. Chem.: Name Game vii. 99 During this continuous rippling, the carbons in swift succession take turns poking out of plane, so that the blips appear to rotate location (hence the designation, pseudorotation). 2002 Jrnl. Organometallic Chem. 646 204/2 There are ten possible configurations, which can be linked by 11 Berry pseudorotations. Derivatives pseudoroˈtational adj. ΘΚΠ the world > matter > chemistry > chemical structure or stereochemistry > [adjective] > of or relating to configuration > of or relating to changes in > of or relating to pseudorotation pseudorotational1959 1959 Jrnl. Amer. Chem. Soc. 81 5884 In common with other saturated molecules with five-membered rings, the pyrrolidine molecule has a ‘pseudorotational’ degree of freedom. 1990 Nucleic Acids Res. 18 278/1 Pseudorotational analysis of the furanose ring based on the ¹H-¹H coupling constants. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1947
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