Zur Ring-Inversion bei Cycloheptan- und Cyclohepten-Derivaten

1967 ◽  
Vol 79 (12) ◽  
pp. 577-578 ◽  
Author(s):  
R. Knorr ◽  
C. Ganter ◽  
J. D. Roberts
Keyword(s):  
Ring Inversion

scholarly journals AM1 Study of the Conformational Properties of (Z,Z)-Cyclonona-1,3-diene

1999 ◽  
Vol 23 (10) ◽  
pp. 616-617
Author(s):  
Issa Yavari ◽  
Hassan Norouzi-Arasi ◽  
Hossain Fallah-Bagher-Shaidaei
Keyword(s):  
Energy Barrier ◽  
Ring Inversion ◽  
Calculated Energy ◽  
Conformational Properties ◽  
Twist Boat ◽  
Calculated Energy Barrier

The unsymmetrical boat-chair BC conformation of ( Z,Z)-cyclonona-1,3-diene is calculated to be 5 kJ mol−1 more stable than the axial-symmetrical twist-boat-chair TBC form; while the calculated energy barrier for limited pseudorotation of BC and TBC is only 10.2kJ mol−1, ring inversion of BC via plane-symmetrical boat geometry requires 24.4 kJ mol−1.

Ring inversion in cyclohexanone

1973 ◽  
Vol 95 (13) ◽  
pp. 4423-4424 ◽  
Author(s):  
F. A. L. Anet ◽  
Gwendolyn. Chmurny ◽  
Jostein. Krane
Keyword(s):  
Ring Inversion

Medium-Sized Cyclophanes. 43.1First Evidence foranti−syn-Ring Inversion under the Nitration of 5,13-Di-tert-butyl-8,16-dimethoxy[2.2]metacyclophane

1997 ◽  
Vol 62 (22) ◽  
pp. 7560-7564 ◽  
Author(s):  
Takehiko Yamato ◽  
Hideo Kamimura ◽  
Tsuyoshi Furukawa
Keyword(s):  
Ring Inversion ◽  
Tert Butyl

ChemInform Abstract: Gas-Phase NMR Spectra of Cyclohexene are Consistent with a Barrier to Ring Inversion of Less Than 30 kJ mol-1.

ChemInform ◽  
2010 ◽  
Vol 23 (45) ◽  
pp. no-no
Author(s):  
C. SUAREZ ◽  
M. TAFAZZOLI ◽  
N. S. TRUE
Keyword(s):  
Gas Phase ◽  
Nmr Spectra ◽  
Ring Inversion

ChemInform Abstract: CONFORMATIONAL EQUILIBRIA DUE TO RING INVERSION IN N-ALKYL-CIS-DECAHYDROISOQUINOLINES

1984 ◽  
Vol 15 (23) ◽  
Author(s):  
J. M. BAILEY ◽  
H. BOOTH ◽  
H. A. R. Y. AL-SHIRAYDA
Keyword(s):  
Ring Inversion ◽  
Conformational Equilibria

Ring Inversion in Cycloöctane

1963 ◽  
Vol 85 (8) ◽  
pp. 1204-1205 ◽  
Author(s):  
F. A. L. Anet ◽  
J. S. Hartman
Keyword(s):  
Ring Inversion

The thermal rearrangement and ring inversion of the 1-methoxyhomotropylium cation

1972 ◽  
Vol 13 (43) ◽  
pp. 4399-4402 ◽  
Author(s):  
Maurice S. Brookhart ◽  
Mary Ann Monroe Atwater
Keyword(s):  
Thermal Rearrangement ◽  
Ring Inversion

Etude par résonance paramagnétique électronique de la radiolyse en phase solide de composés cycliques perfluorés

1970 ◽  
Vol 48 (3) ◽  
pp. 435-446 ◽  
Author(s):  
Claude Chachaty ◽  
Alain Forchioni ◽  
Masaru Shiotani
Keyword(s):  
Electron Spin Resonance ◽  
Solid State ◽  
Relative Intensity ◽  
Transition Point ◽  
Γ Irradiation ◽  
Ring Inversion ◽  
Spin Resonance ◽  
The Matrix ◽  
Γ Rays ◽  
Transition Points

Perfluorocyclohexane (PFCH) and perfluoromethylcyclohexane (PFMCH) have been irradiated in the solid state by γ rays of 60Co. The electron spin resonance (e.s.r.) spectrum of PFCH irradiated at 77 °K corresponds mainly towhich is tumbling in the matrix above 160 °K and disappears at the transition point (180 °K). When γ irradiation is carried out at 200 °K, C6F11• is also produced, but reacts with PFCH giving a radicalsupposed to be [Formula: see text]The e.s.r. spectrum of PFMCH γ irradiated at 77 °K has not been identified; it might be attributable in part to (•C6F11CF3)−. Above 160–170° K, the e.s.r. spectrum corresponds only toThe equal coupling of the four γ fluorines and also the relative intensity 1:4:1 of the three main groups of lines observed above 210 °K suggest that ring inversion occurs with a high rate.We have also studied the radicals [Formula: see text]produced by γ irradiation in the presence of oxygen. The variation of their spectra with temperature, particularly near the transition points, is very characteristic of the motion involved.

The stereochemistry of sulfonium ylides derived from 9-alkylidenethioxanthenes- The relationship between ring inversion and S+C−bond rotation

1985 ◽  
Vol 22 (5) ◽  
pp. 1261-1267 ◽  
Author(s):  
M. Kluba ◽  
J. Harwood ◽  
P. K. Casey ◽  
A. L. Ternay
Keyword(s):  
Ring Inversion ◽  
Bond Rotation ◽  
The Relationship ◽  
Sulfonium Ylides
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