Proton Magnetic Resonance Chemical Shift of Free (Gaseous) and Associated (Liquid) Hydride Molecules

摘要: In order to study the factors giving rise proton resonance chemical shifts of free molecules, as well association due hydrogen bonding, measurements were carried out for a variety simple hydride molecules in both liquid and gaseous states. It is found that state can be interpreted terms combined effect electronegativity magnetic anisotropy atom which bonded. The signals measured near melting point, correspond maximum association, show large lower field relative corresponding gas signals. suggested or bond shifts, system Y ——— H — X largely reduction diamagnetic circulation by electrostatic donor. Further possible contributions certain anomalous cases are also considered.