nuclear magnetic resonance spectroscopy 4 phosphorus nuclear magnetic resonance Charge point models 2 Chemical shielding calculations 2 NMR solid state effects 2 ab initio calculation 2 analytic method 2 anisotropy 2 article 2 biomedical technology assessment 2 calculation 2 chemical structure 2 cobalt 2 conformation 2 correlation coefficient 2 crystal structure 2 density functional theory 2 editorial 2 electron transport 2 elimination reaction 2 molecular interaction 2 molecular mechanics 2 molecular model 2 phosphorus 31 2 proton nuclear magnetic resonance 2 quantum mechanics 2 solid state 2