article 22 nuclear magnetic resonance spectroscopy Magnetic Resonance Spectroscopy 18 chemistry 16 Magnetic shielding 14 Quantum Theory 14 quantum theory 14 Nuclear magnetic shieldings 8 Bromine 6 Cations 6 Chemical shielding calculations 6 Iodine 6 Linear response 6 Lithium 6 Lithium cations 6 Positive ions 6 Small components 6 Spin orbits 6 carbon 6 cation 6 lithium 6 methodology 6 Ab initio 4 Atomic numbers 4 Atoms 4 Basis sets 4 Carbon 4 Chemical compounds 4 Chemical shift 4 Chiral discrimination 4