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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The oxidative-addition to some organosulfur compounds to bis (ð5-cyclopentadienyl) titanium (II) dicarbonyl /

Morris, Stephen Arthur January 1987 (has links)
No description available.
2

The oxidative-addition to some organosulfur compounds to bis (ð5-cyclopentadienyl) titanium (II) dicarbonyl /

Morris, Stephen Arthur January 1987 (has links)
Cp$ sb2$Ti(C))$ sb2$, where Cp = $ eta sp5$-cyclopentadienyl, reacted with RSSSR to give the catenated sulfur complexes Cp$ sb2$Ti(SR)(SSR), where R = CMe$ sb3$, CHMe$ sb2$, CH$ sb2$Ph, p-C$ sb6$H$ sb4$Me and CPh$ sb3$. These complexes, except for R = CPh$ sb3$, reacted with PhCH$ sb2$Br to give Cp$ sb2$TiBr$ sb2$, PhCH$ sb2$SR and PhCH$ sb2$SSR as major products. Cp$ sb2$Ti(SR)(SSR) desulfurized slowly in solution and rapidly in the presence of Ph$ sb3$P, giving Cp$ sb2$Ti(SR)$ sb2$ and Ph$ sb3$PS, in addition to other species. Similarly, phth-SSR, where phth = phthalimide, oxidatively added to Cp$ sb2$Ti(CO)$ sb2$ to give Cp$ sb2$Ti(X)(SSR), where X = phth and R = CMe$ sb3$, CHMe$ sb2$, CH$ sb2$Ph and p-C$ sb6$H$ sb4$Me. Solvolysis by MeOH and EtOH gave the species where X = OMe and OEt. In a similar manner Ph$ sb3$CSSCl added to Cp$ sb2$Ti(CO)$ sb2$ to give Cp$ sb2$Ti(Cl)(SSCPh$ sb3$). Treatment of Cp$ sb2$Ti(SR)(SSR) with (norbornadiene)Mo(CO)$ sb4$ gave the bridged dimers, (Cp$ sb2$Ti($ mu$-SR)-($ mu$-S$ sb{ rm x}$R)Mo(CO)$ sb4$), where x = 1 and 2 and R = CMe$ sb3$ and CHMe$ sb2$. The complexes where x = 2 contained the rare iso-$ mu$-$ eta sp1$-SSR ligand. In solution at low temperatures the bridging thiolato and disulfano groups were predominantly transoid. At higher temperatures, a dynamic process that allowed averaging of cyclopentadienyl ring environments took place. $ sp1$H NMR studies permitted evaluation of $ Delta{ rm G sbsp{c}{ ddagger}}$ for the averaging process.

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