74304-39-5Relevant academic research and scientific papers
PREPARATION OF (η5-C5H5)2Ti ALKYL COMPOUNDS AND REACTIONS WITH UNSATURATED SUBSTRATES
Klei, E.,Telgen, J. H.,Teuben, J. H.
, p. 297 - 308 (2007/10/02)
Reaction of Cp2TiCl with RLi (R = -CH3, -C2H5, -n-C4H9, -s-C4H9, -t-C4H9) yields the thermally instable TiIII compounds Cp2TiR.Reaction of these compounds with 2,6-xylylisocyanide, phenylisocyanate or carbon dioxide results in insertion of these ligands into the Ti-alkyl bond with formation of iminoacyl, amido and carboxylato derivatives, respectively.In the reaction with ketones a pinocol-type dimerisation is observed.
ON THE NATURE AND REACTIVITY OF Cp2TiCH3
Klei, E.,Teuben, J. H.
, p. 97 - 108 (2007/10/02)
Reaction of Cp2TiCl with 1 eq. of CH3Li in ether at -78 deg C yields the green, thermally unstable, trivalent Ti compound Cp2TiCH3 * EPR studies on ether solutions of this compound reveal it to be present in solution as the adduct Cp2TiCH3 * OEt2 * By reaction with DCl Cp2TiCl2 and CH3D are formed.Reaction with 2,6 xylylisocyanide leads to insertion of the isocyanide into the Ti-CH3 bond, while reaction with CS2 yields the disproportionation products Cp2-Ti(CH3)2 and Cp2TiCS2.Thermal decomposition studies on deuteriated analogues confirm the Ti-CH3 structure.The ratedetermining step in the decomposition process is the abstraction of a Cp proton by the methyl group.Under nitrogen the decomposition reaction yields NH3 and N2H4 in amounts of up to 0.28 moles N/Ti.Some catalytic applications of Cp2TiCH3 for hydrogenation and isomerisation of olefins and acetylenes are briefly mentioned.
