In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Computed Properties of C8H7NO3, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 17403-47-3, name is 5-Nitro-2,3-dihydrobenzofuran. In an article，Which mentioned a new discovery about 17403-47-3
Because they are a potential source of valuable structural information, experimental and theoretical results are reported for the bond-order, conformational, and substituent dependencies of the long range H – H coupling constants over four bonds (orthobenzylic coupling, Job) between protons on an sp3-hybridized alpha-carbon atom and the ortho protons of aromatic systems.A large number of methyl aromatic systems were synthesized and their coupling constants were accurately measured.The best correlations in this series of compounds were with the square of the mobile ?-bond order and with the mutual atom-atom polarizability ?rhorho’.In addition, several series of compounds with defined geometries and a range of dihedral angles were synthesized and the 1H NMR parameters were measured.The best agreement of the data is with a semiempirical equation, which relates the orthobenzylic coupling constant to ?rhorho’ and to dihedral angles according to the equation Job(phi, ?rhorho’) = 6.90 ?rhorho’ sin2phi – 0.32 cos2phi Hz.Substituent effects on Job are not usually important; exceptions are found in the 1-substituted acenaphthene derivatives, in which Job becomes more positive with increasing electronegativity, and in ring-substituted toluenes, having both a nitro and an oxygen group which exert significant bond-fixing effects.
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Reference：
Benzofuran – Wikipedia,
Benzofuran | C8H2443O – PubChem