This book demonstrates how NMR relaxation can be applied for structural diagnostics of chemical compounds, recognition of weak intermolecular interactions, determinations of internuclear distances and lengths of chemical bonds when compounds under investigation can exist only in solutions. Written as a textbook for chemists, demanding little background in physics and NMR Its practical approach helps the reader to apply the techniques in the lab First book to teach NMR Relaxation techniques to chemists

Vladimir I. Bakhmutov is a professional NMR spectroscopist at the Department of Chemistry, Texas A&M University, USA.

Preface
How and why nuclei relax
Nucleus in the magnetic field
Spin-lattice and spin-spin nuclear relaxation
Macroscopic magnetization: relaxation times T1 and T
Molecular motions as reason of nuclear relaxation
Correlation times and activation energies of Molecular Motions
Isotropic and anisotropic molecular motions
Bibliography for Chapter 1
How to measure the NMR relaxation times
Exponential and non-exponential nuclear relaxation
Measurements of spin-lattice relaxation times
Measurements of selective and bi-selective T1 times
Determinations of T1( and T2 times
Preparation of samples for relaxation experiments
Bibliography to Chapter 2
Errors in Determinations of Relaxation Times
Instrumental errors
Incorrect parameters for T1, T2 measurements and T1, T2 calculations
Coupled nuclear relaxation
Chemical exchanges
Bibliography to Chapter 3
NMR relaxation by dipole-dipole and quadrupole interactions
The intramolecular dipole-dipole relaxation: homo- and hetero-nuclear dipolar coupling and the spectral density function
Haw to reveal the presence of the dipolar mechanisms
NOE as a test for dipole-dipole nuclear relaxation
Evaluations of the dipolar contributions from selective and non-selective T1 times
Intermolecular dipole-dipole interactions
Electric field gradients at quadrupolar nuclei
Nuclear quadrupole coupling constant as a measure of the electric field gradient
Quadrupole relaxation
Bibliography to Chapter 4
Relaxation by chemical shift anisotropy, spin-rotation relaxation, scalar relaxation of the second kind and cross-mechanisms
Relaxation by chemical shift anisotropy
Spin-rotation relaxation
Interference mechanisms of nuclear relaxation
The scalar relaxation of the second kind
Bibliography to Chapter 5
Nuclear relaxation in molecular systems with anisotropic motions
Spin-lattice nuclear relaxation in ellipsoid molecules: Temperature dependences of T1times
How to reveal anisotropic molecular motions in solutions
Nuclear relaxation in the presence of correlation time distributions
Bibliography to Chapter 6
1H T1 relaxation diagnostics in solutions
Revealing weak intermolecular interactions by T1 time measurements in solutions
T1 studies of exchanges in simple molecular systems
Structural 1H T1 criterion
Partially-relaxed NMR spectra
Bibliography to Chapter 7
Internuclear distances from the 1H T1 relaxation measurements in solutions
X...H distances: metal - hydride bond lengths
How to determine metal-hydride bond lengths by standard 1H T1 measurements
Metal-hydride bond lengths by 1H T1sel and 1H T1min times measurements
Proton-proton distances by standard T1 measurements
H-H distances from T1sel
T1bis measurements
H-H distances in intermediates
Analyzing the errors in 1H T1 determinations of internuclear distances
Bibliography to Chapter

Deuterium quadrupole coupling constants from 2H T1 relaxation measurements in solutions
How to determine DQCC values
DQCC values from the 2H T1 times measurements in solutions (fast motional regime)
DQCC values via 2H T1min measurements in solutions
Errors in DQCC determinations
Bibliography to Chapter 9
Spin-lattice 1H and 2H relaxation in mobile groups
1H T1 times and H-H distances in the presence
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