NMR chemical shifts for protons directly attached to mono- and di-substituted benzenes are compiled from the literature. Data for 1053 sets of data are presented. The data have been examined for reliability using criteria which include high spectral quality, rigorous experimental technique, and sufficient description in assure correct interpretation of results. The data, presented in tabular form include compound name and formula, solvent employed, concentration, temperature, chemical shift, and observation frequency. Other NMR-related data are not given. An author index is included. The data and references cover the literature to June 1976.

Electron paramagnetic resonance spectra of magnetically dilute powder samples have been used to study bonding effects in [Cr(NH3)5HjO]3+, [Cr(NH3)sCl]I+, and [Cr(NH3)sBr]2+. The influence of the lattice has been shown to be negligible for the former two complexes which demonstrates the intramolecular origin of the spin-Hamiltonian parameters. Bonding of the equatorial ammine ligands was shown to be invariant to the axial ligand changes. The zero-field splitting parameters, appear to be sensitive to -bonding effects with significant bonding being indicated for the water ligand in the aquo complex.

Analyses of the electronspinresonance (ESR) hyperfine powder spectra of nitroxide radicals enriched with 1 5N (I=1/2) A qualitative interpretation, ignoring nuclear hyperfine effects, of the line shapes and positions of all the lines occurring in the ESR powder spectra for S =~, ~ systems with rhombic environments is presented. The formulation of the problem assumes the zero-field tensor is dominant in determining the angular dependence of oriented crystal spectra. In favorable cases, g factors and zero-field splitting parameters can be determined, and results from powder spectra are compared with spin-Hamiltonian parameters obtained from a single crystal study of Cr3+: (NIL.).[In(H.O)Ch].

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Die EPR‐Spektren magnetisch verdünnter Pulverproben der Verbindungen (I) bis (III) werden bezüglich der Bindungseffekte untersucht.