Syntheses and Crystal Structures of Dichlorobis[tetramethyl(phenyl)cyclopentadienyl]titanium(IV) and Chlorobis[tetramethyl(phenyl)cyclopentadienyl]titanium(III)

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Title:Syntheses and Crystal Structures of Dichlorobis[tetramethyl(phenyl)cyclopentadienyl]titanium(IV) and Chlorobis[tetramethyl(phenyl)cyclopentadienyl]titanium(III)
Creators:
Horáček, Michal
Polášek, Miroslav
Kupfer, Volkmar
Thewalt, Ulf
Mach, Karel
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 64, 1, pp. 61-72
Uncontrolled Keywords:Sandwich complexes, Titanocenes, Titanium, Crystal structures, Metallocenes, Tetramethyl(phenylcyclopentadienyl ligand, Electronic effect

Abstract

Dichlorobis[η<sup>5</sup>-tetramethyl(phenyl)cyclopentadienyl]titanium(IV) (<strong>1</strong>) and chlorobis[η<sup>5</sup>-tetramethyl- (phenyl)cyclopentadienyl]titanium(III) (<strong>2</strong>) were prepared by the generally known procedures. The X-ray crystal structures of <strong>1</strong> and <strong>2</strong> showed nearly identical Ti-CE (CE - centroid of the cyclopentadienyl ring) and Ti-Cl distances, the CE-Ti-CE angles and dihedral angles between least-squares planes of the cyclopentadienyl rings to those in [(C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>TiCl<sub>2</sub>] and [(C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>TiCl], respectively. ESR spectra of <strong>2</strong> in 2-methyltetrahydrofuran (MTHF) solutions and glasses revealed that <strong>2</strong> coordinates MTHF to give [(C<sub>5</sub>Me<sub>4</sub>Ph)<sub>2</sub>Ti(Cl)(MTHF)] (<strong>2a</strong>). The formation of <strong>2a</strong> in MTHF solution is completed by lowering temperature to 205&nbsp;K. A comparison with the known data gives the following order of affinity of [(C<sub>5</sub>Me<sub>4</sub>R)<sub>2</sub>TiCl] towards MTHF: Ph &gt; SiMe<sub>3</sub> &gt; H &gt; Me. <p>

Title:Syntheses and Crystal Structures of Dichlorobis[tetramethyl(phenyl)cyclopentadienyl]titanium(IV) and Chlorobis[tetramethyl(phenyl)cyclopentadienyl]titanium(III)
Creators:
Horáček, Michal
Polášek, Miroslav
Kupfer, Volkmar
Thewalt, Ulf
Mach, Karel
Uncontrolled Keywords:Sandwich complexes, Titanocenes, Titanium, Crystal structures, Metallocenes, Tetramethyl(phenylcyclopentadienyl ligand, Electronic effect
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:64
Number:1
Page Range:pp. 61-72
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19990061UNSPECIFIED
ID Code:1456
Item Type:Article
Deposited On:06 Feb 2009 17:09
Last Modified:06 Feb 2009 16:09

Citation

Horáček, Michal; Polášek, Miroslav; Kupfer, Volkmar; Thewalt, Ulf; Mach, Karel (1999) Syntheses and Crystal Structures of Dichlorobis[tetramethyl(phenyl)cyclopentadienyl]titanium(IV) and Chlorobis[tetramethyl(phenyl)cyclopentadienyl]titanium(III). Collection of Czechoslovak Chemical Communications, 64 (1). pp. 61-72. ISSN 0010-0765

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