About: Activation of small molecules by titanocene(II) and zirconocene(II) complexes.     Goto   Sponge   NotDistinct   Permalink

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  • Reactivity of thermally stable monomeric titanocenes(TiII) towards dihydrogen, dinitrogen, sulfur or phosphorus, alkylsilylhydrides, borohydrides, and simple alkenes and alkynes. Hydrogenations at low-to-moderate pressure will be established carried out for titanocene and zirconocene compounds containing sigma-Ti-C terminal, sigma-Ti-C cyclopentadienyl ring-tethered, and pi-Ti-C (back bonding) bonds in order to determine their susceptibility to hydrogenolysis and to synthesize structurally new complexes. The titanocene and zirconocene [M(C5H5-nMen)2(bis(trimethylsilyl)ethyne)] (n = 0-5) complexes will be investigated as catalysts for dimerization of terminal alkynes, and hydroamination of alkynes and alkenes. Analogously, the series of titanocenes or zirconocenes at the onset of their formation will be stabilized by ethene or other unsaturated hydrocarbons to examine their utilization in organometallic synthesis and catalysis. (en)
  • Bude zkoumána reaktivita termálně stabilních monomerních titanocenů(TiII) vůči molekulám vodíku, dusíku, síry nebo fosforu, alkylsilylhydridům, borohydridům a jednoduchým alkenům či alkinům. Titanocenové a zirkonocenové sloučeniny obsahující sigma-Ti-C terminální vazby, sigma-Ti-C vazby intramolekulárně vázané na cyklopentadienyly a pi-Ti-C vazby (back bonding) budou hydrogenovány při nízkém až mírném tlaku pro zjištění jejich citlivosti k hydrogenolýze a pro syntézu strukturně nových komplexů. Titanocenové a zirkonocenové komplexy [M(C5H5-nMen)2(bis(trimethylsilyl)ethin)] (n = 0-5) budou zkoumány jako katalyzátory dimerizace terminálních alkinů a hydroaminace alkinů a alkenů. Analogicky řada titanocenů a zirkonocenů tvořených in-situ bude stabilizována ethenem a dalšími nenasycenými uhlovodíky a bude zkoumáno jejich využití v organometalické syntéze a katalýze tvorby C-C vazeb. (cs)
Title
  • Aktivace malých molekul titanocenovými(II) a zirkonocenovými(II) komplexy. (cs)
  • Activation of small molecules by titanocene(II) and zirconocene(II) complexes. (en)
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  • titanocene; zirconocene; monomeric titanocene; low-valent complexes; dihydrogen; dinitrogen; sulfur; phosphorus; alkylsilylhydrides; alkenes; alkynes; hydrogenation; linear dimerization of terminal alkynes; catalytic amination (en)
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