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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Electron Transfer from Sodium to Oriented Nitromethane, CH(3)NO(2): Probing the Spatial Extent of Unoccupied Orbitals.

Beams of sodium atoms with energies of a few eV are crossed with a beam of oriented CH(3)NO(2) molecules to study the effect of collision energy and orientation on electron transfer. The electron transfer produces Na(+) ions and free electrons, parent negative ions (CH(3)NO(2)(-)), and fragmentation ions NO(2)(-) and O(-) in proportions that depend on the collision energy. The steric asymmetry is very small or zero and suggests that production of all of the ions is favored by sideways attack with respect to the permanent dipole along the C-N axis. In these experiments, the electron appears to be transferred into the (2)B(1) state of the anion comprising mainly the pi(NO) LUMO, producing a valence-bound state rather than a dipole-bound state.[1]


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