Hyperconjugative interactions 22 Sulfur compounds 10 Coupling constants 8 NMR 8 Spin-spin coupling constants 8 Nuclear magnetic resonance 6 Substituent effect 6 Substituent effects 6 13C NMR 4 Antibonding orbitals 4 Couplings 4 Fermi contact 4 Natural bond orbitals 4 Negative hyperconjugative interactions 4 Qualitative approach 4 Second orders 4 Spin dynamics 4 Transmission mechanisms 4 Virtual excitations 4 article 4 substitution reaction 4 13C SCS 2 19F chemical shift 2 1JCH and 2JCH coupling constants 2 3 dioxides 2 3JCH couplings 2 ¹J_CH and ²J_CH coupling constants 2 AS models 2 Aldehydes 2 Amino acids 2