High Resolution Nuclear Magnetic Resonance Spectroscopy, Volume 1 |
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Page 135
... C - C and C - H Bonds The simplest saturated hydrocarbon molecule to show more than one reso- nance peak is propane , CH3CH2CH3 . The hydrogen resonance spectrum ( 41 ) is that of an A , B6 system with a chemical shift between the two ...
... C - C and C - H Bonds The simplest saturated hydrocarbon molecule to show more than one reso- nance peak is propane , CH3CH2CH3 . The hydrogen resonance spectrum ( 41 ) is that of an A , B6 system with a chemical shift between the two ...
Page 166
... the fragments C - C and C < and CH . Both the valence bond and the molecular orbital treatments of the problem predict that there is a cor- relation between the vicinal H - H coupling constants and the dihedral angle between the C - H bonds ...
... the fragments C - C and C < and CH . Both the valence bond and the molecular orbital treatments of the problem predict that there is a cor- relation between the vicinal H - H coupling constants and the dihedral angle between the C - H bonds ...
Page 193
... C - H bond is given by Фа a21 / 2 a = aμs + ( 1 − a ) 1/2 po ( 5.53 ) a is the s - character of the C - H bond , and the po's are linear combinations of the px , P , and p , orbitals . Substituting for in equation ( 5.52 ) , and taking H ...
... C - H bond is given by Фа a21 / 2 a = aμs + ( 1 − a ) 1/2 po ( 5.53 ) a is the s - character of the C - H bond , and the po's are linear combinations of the px , P , and p , orbitals . Substituting for in equation ( 5.52 ) , and taking H ...
Contents
GENERAL THEORY OF NUCLEAR MAGNETIC RESONANCE 10 como 2 2 2 2 2 2 2 3 2 | 10 |
THE ORIGIN OF CHEMICAL SHIFTS AND SPINSPIN COUPLING | 59 |
Effects in paramagnetic materials | 115 |
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19F resonance ¹H resonance spectrum AA'BB absorption bands acid Amer analysis applied benzene calculated Chem chemical shift chemical shift difference coil compounds coupling constants cycles sec cycles sec-1 decoupling diagonal diamagnetic doublet E₁ effect eigenfunctions eigenvalues electron energy levels exchange fluorine given gives H₁ H₂ Hamiltonian hydrogen atoms hydrogen bonding hydrogen nuclei hydrogen resonance interaction irradiation line width magnetic field magnetic nuclei magnetically equivalent matrix elements Mc sec-1 measured method methyl molecular molecule multiplet non-equivalent nuclear magnetic resonance nuclei observed obtained orbital paramagnetic parameters Phys proton radiofrequency radiofrequency field relative intensities relative signs relaxation resonance frequency rotation sample sec-¹ Section secular equation shielding constant solutions solvent spectra spectrometer spin functions spin system spin-lattice relaxation spin-spin substituted symmetry T₁ T₂ Table temperature tion transition energies values wavefunctions zero