Effects of Perpendicular Aryl Groups on Electronic Properties and Complexation of 4,4-Dihydrodithienosilole

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  • Akihiro Tsurusaki
    Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531 , Japan
  • Soichiro Kyushin
    Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515 , Japan

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<jats:title>Abstract</jats:title> <jats:p>4,4-Dihydrodithienosilole bearing perpendicular Tip groups at the 3,5-positions (1) was synthesized. Compound 1 was characterized by NMR, IR, and mass spectroscopy and X-ray crystallography. The lowest energy absorption band in the UV/Vis spectrum is shifted bathochromically compared with the parent 4,4-dihydrodithienosilole II. The fluorescence quantum yield of 1 is much higher than that of II. The oxidative addition of 1 to Pt(PPh3)2(C2H4) gave the isolable silylplatinum hydride complex 7 in contrast to II and a related compound. These results indicate that the Tip groups affect the electronic properties and complexation.</jats:p>

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