dipole-quadrupole interaction

  • 1Dipole — This article is about the electromagnetic phenomenon. For other uses, see dipole (disambiguation). The Earth s magnetic field, approximated as a magnetic dipole. However, the N and S (north and south) poles are labeled here geographically, which… …

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  • 2Cation-pi interaction — is a noncovalent molecular interaction between the face of an electron rich pi system (e.g. benzene, ethylene) with an adjacent cation (e.g. Li+, Na+). This unusual interaction is an example of noncovalent bonding between a monopole (cation) and… …

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  • 3Magnetic dipole transition — The interaction of an electromagnetic wave with an electron bound in an atom or molecule can be described by time dependent perturbation theory. Magnetic dipole transitions describe the dominant effect of the coupling to the magnetic part of the… …

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  • 4Magnetic dipole — A magnetic dipole is the limit of either a closed loop of electric current or a pair of poles as the dimensions of the source are reduced to zero while keeping the magnetic moment constant. It is a magnetic analogue of the electric dipole, but… …

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  • 5Nuclear quadrupole resonance — NQR redirects here. For the Tufts University tradition, see Naked Quad Run. Nuclear quadrupole resonance spectroscopy or NQR is a chemical analysis technique related to nuclear magnetic resonance (NMR).[1] Principle In NMR, nuclei with spin ≥ 1/2 …

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  • 6Multipole expansion — A multipole expansion is a mathematical series representing a function that depends on angles usually the two angles on a sphere. These series are useful because they can often be truncated, meaning that only the first few terms need to be… …

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  • 7Rotational spectroscopy — Part of the rotational vibrational spectrum of carbon monoxide (CO) gas (from FTIR), showing the presence of P and R branches. Frequency is on the x axis, and absorbance on the y axis. Rotational spectroscopy or microwave spectroscopy studies the …

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  • 8Distributed multipole analysis — (DMA) is a compact and accurate way of describing the spatial distribution of electric charge within a molecule. The DMA method was devised by Prof. Anthony Stone of Cambridge University to describe the charge distribution of a molecule in terms… …

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  • 9Nuclear magnetic resonance crystallography — (NMR crystallography) is a method which utilizes primarily NMR spectroscopy to determine the structure of solid materials on the atomic scale. Thus, solid state NMR spectroscopy would be used primarily, possibly supplemented by quantum chemistry… …

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  • 10Residual dipolar coupling — The residual dipolar coupling between two spins in a molecule occurs if the molecules in solution exhibit a partial alignment leading to an incomplete averaging of spatially anisotropic dipolar couplings.Partial molecular alignment leads to an… …

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