C-13 NUCLEAR-MAGNETIC-RESONANCE STUDY OF PHENYL DERIVATIVES OF B, SI,SN, P, AND TE FLUORIDES

C-13 nuclear magnetic resonance data for a variety of phenyl derivativ es of boron, silicon, tin, phosphorus, and tellurium fluorides are pre sented. Neutral, anionic, and cationic complexes are included and the coordination number of the central element varies from 3 to 6. Empiric al equations of the C-13 chemical shifts of the benzene ring have been deduced by taking into consideration the charge density, dipole momen t, and binding energy, and the C-13 chemical shifts calculated from th ese equations deviate from the experimental values by up to 1.4 ppm, b ut mostly less than 0.7 ppm.