Electric Dipole Moment Investigation of Buttressing in Alkyl Duryl Ketones

1975 ◽  
Vol 53 (13) ◽  
pp. 2024-2030 ◽  
Author(s):  
A. George Pinkus ◽  
Herman C. Custard Jr.
Keyword(s):  
Dipole Moment ◽  
Carbonyl Group ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Alkyl Group ◽  
Dipole Moments ◽  
Electron Delocalization ◽  
Methyl Groups ◽  
Method Of Calculation

Dipole moments (D) determined for the following alkyl duryl ketones in benzene at 30° were: Me, 2.83; Et, 2.80; i-Pr, 2.74; t-Bu, 2.65. The decrease in the series is explained by increasing rotational restriction about the carbonyl group due to an increasing interference by the ortho methyl groups with the alkyl group. This results in a greater twist from coplanarity between the ring and carbonyl and less π-electron delocalization and consequently a lower dipole moment as the size of the alkyl increases. The increase observed for the duryl ketone moments over those of corresponding mesityl ketones is tentatively explained as due to a higher duryl group moment relative to the mesityl moment. The interplanar angles (angles of twist) for the duryl ketones calculated with the Braude–Sondheimer equation were slightly larger than those calculated for the mesityl ketones, the magnitude depending on the method of calculation. It is tentatively concluded that evidence from dipole moment data indicates that a small buttressing effect exists in the duryl ketone system.

scholarly journals DERIVATION OF GENERALIZED THOMAS–BARGMANN–MICHEL–TELEGDI EQUATION FOR A PARTICLE WITH ELECTRIC DIPOLE MOMENT

2013 ◽  
Vol 28 (29) ◽  
pp. 1350147 ◽  
Author(s):  
TAKESHI FUKUYAMA ◽  
ALEXANDER J. SILENKO
Keyword(s):  
Dipole Moment ◽  
Electromagnetic Fields ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Classical Equation ◽  
Spin Motion ◽  
Electric Dipole Moments ◽  
Momentum Direction ◽  
Telegdi Equation

General classical equation of spin motion is explicitly derived for a particle with magnetic and electric dipole moments in electromagnetic fields. Equation describing the spin motion relative to the momentum direction in storage rings is also obtained.

scholarly journals Динамика фотоиндуцированного вращения сферической частицы в постоянном электрическом поле

2019 ◽  
Vol 89 (1) ◽  
pp. 5
Author(s):  
А.И. Грачев
Keyword(s):  
Dipole Moment ◽  
Electric Field ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Constant Electric Field ◽  
Rotation Effect ◽  
General Terms ◽  
Nonspherical Shape ◽  
Rotation Dynamics

AbstractThe rotation of a spherical particle in a constant electric field (an effect found earlier) has been analyzed. The particle is illuminated to induce the electric dipole moment of the sphere. The dynamics of the rotation effect has been considered in general terms to refine conditions for adiabatic rotation. The features of the particle’s nonadiabatic rotation have been demonstrated with a sphere placed in a medium with an infinitesimal viscosity. It has been shown that the nonadiabatic rotation dynamics to a great extent depends on a relationship between the electrical and photoinduced dipole moments of the sphere. The rotation dynamics of a particle with a slightly nonspherical shape has been briefly analyzed.

Elektrisches Dipolmoment von TlBr und TlJ

1971 ◽  
Vol 26 (11) ◽  
pp. 1809-1812 ◽  
Author(s):  
E. Tiemann
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Vibrational State ◽  
Stark Effect ◽  
Dipole Moments ◽  
Electric Dipole Moments ◽  
Ground Vibrational State ◽  
Rotational Transitions

Stark-effect measurements on pure rotational transitions of TlBr and Til are described. The derived electric dipole moments of the most abundant isotopic molecules on the ground vibrational state are:205TL79Br : | μ0| = (4.493 ± 0.050) D , 205Tl127 I | μ 0| =(4.607 ± 0.070) D .The electric dipole moment of 205Tl19F | μ 0|=4.2282 (8) D was used as standard.

Probing new CP-odd thresholds with electric dipole moments

2007 ◽  
Vol 85 (6) ◽  
pp. 597-606
Author(s):  
A Ritz
Keyword(s):  
Dipole Moment ◽  
Cp Violation ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Dipole Moments ◽  
New Physics ◽  
Electric Dipole Moments ◽  
Higher Dimensional ◽  
The Status ◽  
Generic Class

We dicuss the utility of precision probes for flavour-diagonal CP-violation, namely, searches for electric dipole moments of nucleons, atoms, and molecules, in looking for new physics thresholds that manifest themselves primarily through higher dimensional operators. After reviewing the status of the electric dipole moment (EDM) constraints, we consider first the sensitivity to a generic class of dimension-five operators generated at a supersymmetric threshold, through their contribution to CP- and flavour-violating observables. Such thresholds can be probed by EDMs up to a scale of order 108 GeV depending on the flavour structure. We then turn to consider the possibility that electroweak baryogenesis is made feasible by the introduction of dimension-six operators at a TeV-scale threshold. The EDM costraints on dimension-six couplings of the Higgs to the fermions currently still allow a reasonable window in parameter space for these models, but the next generation of experiments should provide a conclusive test. PACS Nos.: 11.30.Er, 12.60.Fr, 12.60.Jv

High Field Stark Effects in CH and NH

1974 ◽  
Vol 52 (15) ◽  
pp. 1429-1437 ◽  
Author(s):  
E. A. Scarl ◽  
F. W. Dalby
Keyword(s):  
Dipole Moment ◽  
Electric Fields ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
High Field ◽  
Dipole Moments ◽  
Optical Spectra ◽  
Vibrational States ◽  
Stark Effects

A LoSurdo discharge was used to apply electric fields of up to 290 kV/cm to a mixture of cyanogen and hydrogen, and to ammonia, permitting the observation of Stark effects in the optical spectra of the CH and NH molecules, respectively. These experiments yielded the following values of the molecular electric dipole moment in the ground vibrational states: μ(CH, A2Δ) = 0.887 ± 0.045 D, and μ(NH, X3Σ) = 1.389 ± 0.075 D. A table of experimental and theoretical dipole moments of first-row hydrides is included.

scholarly journals LIMITS ON THE DIPOLE MOMENTS OF THE τ-LEPTON VIA THE PROCESS e+e-→τ+τ-γ IN A LEFT–RIGHT SYMMETRIC MODEL

2004 ◽  
Vol 19 (29) ◽  
pp. 2227-2237 ◽  
Author(s):  
A. GUTIÉRREZ-RODRÍGUEZ ◽  
L. N. LUIS-NORIEGA ◽  
M. A. HERNÁNDEZ-RUÍZ
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Magnetic Moment ◽  
Electric Dipole ◽  
Anomalous Magnetic Moment ◽  
Dipole Moments ◽  
Symmetric Model ◽  
Mixing Angle ◽  
Stringent Limit ◽  
Model Mixing

Limits on the anomalous magnetic moment and the electric dipole moment of the τ lepton are calculated through the reaction e+e-→τ+τ-γ at the Z1-pole and in the framework of a left–right symmetric model. The results are based on the recent data reported by the L3 collaboration at CERN LEP. Due to the stringent limit of the model mixing angle ϕ, the effect of this angle on the dipole moments is quite small.

scholarly journals THE SCALAR UNPARTICLE EFFECT ON THE CHARGED LEPTON ELECTRIC DIPOLE MOMENT

2009 ◽  
Vol 24 (14) ◽  
pp. 2729-2740 ◽  
Author(s):  
E. O. ILTAN
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Charged Lepton ◽  
Dipole Moments ◽  
Effective Interaction ◽  
Electric Dipole Moments ◽  
Effective Lagrangian ◽  
Free Parameters ◽  
Scaling Dimension

We study the charged lepton electric dipole moment which is induced by the scalar unparticle mediation and we predict the appropriate range for the free parameters appearing in the effective Lagrangian which drives the unparticle-standard model lepton interactions. We observe that the charged lepton electric dipole moment is strongly sensitive to the scaling dimension du of the unparticle and the new couplings in the effective interaction. Furthermore, we see that the current experimental limits of charged lepton electric dipole moments can ensure an appropriate range for these free parameters.

scholarly journals Electric dipole moments and chemical bonding of diatomic alkali–alkaline earth molecules

2016 ◽  
Vol 18 (8) ◽  
pp. 5964-5973 ◽  
Author(s):  
Johann V. Pototschnig ◽  
Andreas W. Hauser ◽  
Wolfgang E. Ernst
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Chemical Bonding ◽  
Alkaline Earth ◽  
Dipole Moments ◽  
Electric Dipole Moments ◽  
Permanent Electric Dipole Moment

In the present study we investigated the permanent electric dipole moment and other properties of several alkali–alkaline earth molecules in the lowest Σ+ state of the doublet and quartet multiplicity.

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