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The synthesis, ¹H-NMR properties and photochromism of the cyclopent(e)dimethyldihydropyrene anion and its metal complexes

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dc.contributor.author Fan, Wei
dc.date.accessioned 2009-11-17T22:35:33Z
dc.date.available 2009-11-17T22:35:33Z
dc.date.copyright 2005 en
dc.date.issued 2005
dc.identifier.uri http://hdl.handle.net/1828/1864
dc.description.abstract The synthesis of the cyclopentadiene-fused dimethyldihydropyrene, CpDI-IP(H) 44, from DHP 31 was achieved in a seven-step synthesis in an overall yield of 7%. Deprotonation of 44 gave the Cp anion fused CpDHP anion 28. The photochromic properties of 28 were studied. It is found that 28 is photochromic and its behavior is intermediate between the parent DHP 31 and the benzannelated DHP 36. The 1H-NMR data of 28 were also analyzed and showed that the Cp anion has similar bond fixing effect on the DHP ring as benzene does, but to a lesser extent. The complexation of anion 28 to various metal centers has been investigated. While the reactions of 28 with Re(CO)5Br, (Cp*RuCl2)„ and FeC12 yielded (CpDHP)Re(CO)3 51. Cp*Ru(CpDHP) 52 and (CpDHP)2Fe 54 respectively, the reactions with Mn. Y. Yb(III) or Zr precursors either gave the starting materials back or resulted in the decomposition of 28 to unidentified products. Reaction of the protonated form CpDHP(H) 44 with Yb[N(SiMe3)2I(thf)2 afforded Yb(CpDHP)2(thf)2 57. en
dc.language English eng
dc.language.iso en en
dc.rights Available to the World Wide Web en
dc.subject photochromism en
dc.subject aromoaticity en
dc.subject.lcsh UVic Subject Index::Sciences and Engineering::Chemistry en
dc.title The synthesis, ¹H-NMR properties and photochromism of the cyclopent(e)dimethyldihydropyrene anion and its metal complexes en
dc.type Thesis en
dc.contributor.supervisor Mitchell, Reginald
dc.degree.department Dept. of Chemistry en
dc.degree.level Doctor of Philosophy Ph.D. en


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