Crystal Structures of Unusual Titanocene By-products from Attempted Dimerization of Terminal Alkynes

[img]PDF - Authorized users only
Language: English
292Kb
Title:Crystal Structures of Unusual Titanocene By-products from Attempted Dimerization of Terminal Alkynes
Creators:
Gyepes, Róbert
Císařová, Ivana
Horáček, Michal
Čejka, Jiří
Petrusová, Lidmila
Mach, Karel
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 65, 8, pp. 1248-1261
Uncontrolled Keywords:Titanocenes, Titanium, Butadiene bridge, X-Ray diffraction, Metallocenes, Indenyl bridge, Oligomerization, Alkynes, Hydride bridge

Abstract

Structures of unusual organometallic products μ-[(1,2,3,3a,7a-η):(3a,4,5,6,7,7a-η)-4,7- bis(trimethylsilyl)indenyl]-di-μ-hydridobis(η<sup>5</sup>-cyclopentadienyl)titanium(Ti<sup>III</sup>/Ti<sup>II</sup>) (<strong>9</strong>) and μ-[(3,4,5-η):(4,5,6-η)-(<i>E</i>,<i>E</i>)-2,2,7,7-tetramethylocta-3,5-diene}bis{bis(η<sup>5</sup>-methylcyclopentadienyl)titanium} (<strong>10a</strong>) were determined by X-ray diffraction analysis. Compounds <strong>9</strong> and <strong>10a</strong> arose as by-products in very low yields in the Ti(C<sub>5</sub>H<sub>5</sub>)<sub>2</sub>(η<sup>2</sup>-Me<sub>3</sub>SiC≡CSiMe<sub>3</sub>)-HC≡CSiMe<sub>3</sub> and Ti(C<sub>5</sub>H<sub>4</sub>Me)<sub>2</sub>(η<sup>2</sup>-Me<sub>3</sub>SiC≡CSiMe<sub>3</sub>)-HC≡CCMe<sub>3</sub> systems, respectively, when exposed to sunlight. Mechanisms of their formation were tentatively discussed. <p>

Title:Crystal Structures of Unusual Titanocene By-products from Attempted Dimerization of Terminal Alkynes
Creators:
Gyepes, Róbert
Císařová, Ivana
Horáček, Michal
Čejka, Jiří
Petrusová, Lidmila
Mach, Karel
Uncontrolled Keywords:Titanocenes, Titanium, Butadiene bridge, X-Ray diffraction, Metallocenes, Indenyl bridge, Oligomerization, Alkynes, Hydride bridge
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:65
Number:8
Page Range:pp. 1248-1261
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20001248UNSPECIFIED
ID Code:1714
Item Type:Article
Deposited On:06 Feb 2009 17:12
Last Modified:06 Feb 2009 16:12

Citation

Gyepes, Róbert; Císařová, Ivana; Horáček, Michal; Čejka, Jiří; Petrusová, Lidmila; Mach, Karel (2000) Crystal Structures of Unusual Titanocene By-products from Attempted Dimerization of Terminal Alkynes. Collection of Czechoslovak Chemical Communications, 65 (8). pp. 1248-1261. ISSN 0010-0765

Repository Staff Only: item control page