Ansa-titanocene pyrrolyl complexes: The synthesis and structural characterization of [Me2Si(C5Me4) 2]Ti(NC4H4)X (X = H, Me, Cl and NC 4H4) and [Me2Si(C5Me 4)(C5Me3CH2)]Ti(NC4H 4)

Hyosun Lee, Jeffrey B. Bonanno, Brian M. Bridgewater, David G. Churchill, Gerard Parkin

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A series of titanium-pyrrolyl compounds, namely [Me2Si(C 5Me4)2]Ti(NC4H4)X (X = H, Me, Cl, NC4H4) and [Me2Si(C5Me 4)(C5Me3CH2)]Ti(NC4H 4) has been synthesized and structurally characterized by X-ray diffraction. Analysis of the TiNC4H4 bond lengths in these complexes indicates that pyrrolyl does not, by comparison to dialkylamido, act as an efficient π-donor ligand. The fulvene complex [Me2Si(C 5Me4)(C5Me3CH2)] Ti(NC4H4) is obtained via thermal elimination of CH 4 and H2 from [Me2Si(C5Me 4)2]Ti(NC4H4)Me and [Me 2Si(C5Me4)2]Ti(NC4H 4)H, respectively. The latter transformation is reversible, with [Me2Si(C5Me4)(C5Me 3CH2)]Ti(NC4H4) reacting with H 2 to give [Me2Si(C5Me4) 2]Ti(NC4H4)H at room temperature. In accord with this reversibility, treatment of [Me2Si(C5Me 4)2]Ti(NC4H4)H with D2 results in incorporation of deuterium into the hydride and one ring methyl group of each cyclopentadienyl ring of the [Me2Si(C5Me 4)2] ligand.

Original languageEnglish (US)
Pages (from-to)1356-1365
Number of pages10
JournalPolyhedron
Volume24
Issue number11
DOIs
StatePublished - Aug 4 2005
Externally publishedYes

Keywords

  • Ansa
  • Fulrene
  • Metallocene
  • Pyrrolyl
  • Titanium
  • Titanocene

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Ansa-titanocene pyrrolyl complexes: The synthesis and structural characterization of [Me<sub>2</sub>Si(C<sub>5</sub>Me<sub>4</sub>) <sub>2</sub>]Ti(NC<sub>4</sub>H<sub>4</sub>)X (X = H, Me, Cl and NC <sub>4</sub>H<sub>4</sub>) and [Me<sub>2</sub>Si(C<sub>5</sub>Me <sub>4</sub>)(C<sub>5</sub>Me<sub>3</sub>CH<sub>2</sub>)]Ti(NC<sub>4</sub>H <sub>4</sub>)'. Together they form a unique fingerprint.

Cite this