## High resolution nuclear magnetic resonance spectroscopy. 2 |

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Page 54

(time t„) to rotate the macroscopic polarisation

the x y plane. To an observer in the coordinate system rotating about the z-axis,

the

(time t„) to rotate the macroscopic polarisation

**vector**by 90° from the z-axis intothe x y plane. To an observer in the coordinate system rotating about the z-axis,

the

**vector**would appear to turn about the Hi axis. Because of the spread in ...Page 66

Consider a nucleus in a magnetic field H with a

, H = curl A. (3.9) A is not defined uniquely by equation (3.9) since we may add an

arbitrary

Consider a nucleus in a magnetic field H with a

**vector**potential A defined by<15>, H = curl A. (3.9) A is not defined uniquely by equation (3.9) since we may add an

arbitrary

**vector**to A without changing the value of H. This may be seen by ...Page 210

If the main field HQ is at a value far below that required to satisfy the resonance

condition, the application of a fixed value of the radiofrequency field at low

amplitude leaves the magnetisation

value of ...

If the main field HQ is at a value far below that required to satisfy the resonance

condition, the application of a fixed value of the radiofrequency field at low

amplitude leaves the magnetisation

**vector**M0 coincident with the z-axis. As thevalue of ...

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### Contents

Introduction | 1 |

J Chem Phys 3 4 3 5 3 6 4 2 4 3 5 2 6 14 7 1 7 2 7 7 8 3 8 19 8 22 8 26 8 | 3 |

General Theory of Nuclear Magnetic Resonance | 10 |

Copyright | |

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### Common terms and phrases

AA'BB absorption bands applied atomic orbitals benzene calculated carbon Chem chemical shift chemical shift difference components compounds coupling constants cycles sec-1 diamagnetic dipole effect eigenfunctions eigenvalues electron energy levels exchange experimental fluorine given gives Gutowsky H resonance Hamiltonian hence hydrogen atoms hydrogen bonding hydrogen nuclei hydrogen resonance interaction line width linear liquid magnetic field magnetic nuclei magnetically equivalent magnitude matrix elements Mc sec-1 measured methane method methyl molecular orbital molecule multiplet non-equivalent nuclear magnetic resonance observed obtained oscillator paramagnetic parameters Phys Pople radiofrequency radiofrequency field receiver coil reference relative intensities relative signs relaxation resonance spectrum ring current rotation sample sec1 Section secular equation shielding coefficient shielding constant shown in Fig sideband signal solution solvent spectra spectrometer spin functions spin system spin-lattice relaxation substituted susceptibility symmetry Table temperature tion transition energies valence bond values vector wavefunctions zero