Section 6.5: Emperical versus Molecular Formulas Oct 23, 2017 · The molecular electronic states of the SiO2+ dication have been investigated in a joint theoretical and experimental analysis. The use of a tip-shaped sample for tomographic atom probe analysis off... The Shapes of Molecules. The chemical bonding in a compound is very obviously related to its It is perhaps less obvious that the shape of a molecule may also be crucial to its physical and chemical properties. The molecular shape is predicted to be trigonal planar around each carbon atom.