<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Fluxá, Viviana S.</dc:creator>
  <dc:creator>Jenny, Titus A.</dc:creator>
  <dc:creator>Bochet, Christian G.</dc:creator>
  <dc:date>2005-04-16</dc:date>
  <dc:description xmlns:ns0="xml" ns0:lang="en">A simple spectroscopic method was applied to determine the geometry of tetrasubstituted alkenes. The observation of the ⁵J-coupling constants in proton NMR spectra on the ¹³C satellite signals could confirm the previous misassignment of 2,3-diphenylbutene. Hence, the (E)-isomer showed a 1.5 Hz coupling constant, whereas the (Z)-isomer showed a 1.1 Hz coupling constant. Based on this new assignment and a stereospecific preparation, we also propose a revision concerning the NMR data of 2,3-diphenyl-2,3-butanediol.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>https://folia.unifr.ch/global/documents/299693</dc:identifier>
  <dc:identifier>https://folia.unifr.ch/documents/299693/files/1_bochet_gdt.pdf</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tetlet.2005.04.001</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>License undefined</dc:rights>
  <dc:source>Tetrahedron Letters. - 2005, vol. 46, no. 2, p. 3793-3795</dc:source>
  <dc:subject xmlns:ns1="xml" ns1:lang="en">synthesis</dc:subject>
  <dc:subject xmlns:ns2="xml" ns2:lang="en">stilbene</dc:subject>
  <dc:subject xmlns:ns3="xml" ns3:lang="en">NMR</dc:subject>
  <dc:subject>info:eu-repo/classification/udc/54</dc:subject>
  <dc:title xmlns:ns4="xml" ns4:lang="en">Geometry determination of tetrasubstituted stilbenes by proton NMR spectroscopy</dc:title>
  <dc:type>http://purl.org/coar/resource_type/c_6501</dc:type>
</oai_dc:dc>