Journal of Photoscience

Korean Society of Photoscience (한국광과학회)
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PHOTOCHEMISTRY OF 1-PHENYL-4-(PENTAMETHYLDISILANYL)BUTA-1,2-DIYNE:$[PdCI_2(PPh_3)_2]$-CATALYZED REACTION

  • Lee, Seong-Taek (Department of Chemistry, The Korea Advanced Institute of Science and Technology) ;
  • Baek, Eun-Kyung (Department of Chemistry, The Korea Advanced Institute of Science and Technology) ;
  • Shim, Sang-Chul (Department of Chemistry, The Korea Advanced Institute of Science and Technology)
  • Published : 1994.06.01
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Abstract

$PdCI_2(PPh_3)_2$-catalyzed photolysis of 1-phenyl-4-(pentamethyldisilanyl)buta-1,3-diyne (1) in dry benzene gives 1,4-disilacyclohexa-2,5-diene type dimerization products(3-6) via silacyclopropene. The silacyclopropene is formed from the singlet excited state of 1 and this silacyclopropene reacts with $(PPh_3)_2Pd^0$to form palladasilacyclobutene. In this reaction, the silylene-palladium complex is generated and reacts with 1 to give another silacyclopropene. $PdCI_2(PPh_3)_2$catalyzed photolysis of 1 with other alkynes supports the involvement of this silylene complex.

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