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 Are Chemical Reactions dependent on  reagent orientation?

Indirect Evidence:  yes
     "Common Sense"  (dates back to ancient Greece)
     "Chemical Intuition" (more modern version of above)
      Molecular Structure
           Electron & X-ray diffraction
           Spectroscopy
      Reactivity
           Walden inversion
           Kinetic steric factors

Direct EvidenceYES
     We orient dipolar molecules in molecular beams and compare the reactivity at the positive end and the negative end.
    (more coming--this research supported by the NSF)