Novel zirconacyclopentadiene complex; 8,8-bis(cyclopentadienyl)-7,9-bis(trimethylstannyl)-8-zirconabicyclo-[4.3.0]nona-1(9),6(7)-diene

Synthesis, X-ray analysis, and catalytic activity for ethylene polymerization

Kunihiro Oouchi, Makoto Mitani, Michiya Hayakawa, Tohru Yamada, Teruaki Mukaiyama

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Zirconacyclopentadiene complex 2c containing gem-dimetallated carbon atoms by zirconium and tin was prepared by the oxidative coupling reaction of 'Cp2Zr' with distannyldiyne compounds. Complex 2c having trimethylstannyl groups was characterized by X-ray diffraction and its structure was compared with zirconacyclopentadiene analogues having tert-butyl groups (2a) or trimethylsilyl groups (3). The five-membered zirconacycle ring of 2c has a planar conformation whereas it is twisted in complexes 2a and 3. The C-Zr-C angle in 2c is smaller than those of the corresponding 2a and 3. The polymerization of ethylene proceeded when these complexes were used in combination with methylaluminoxane and it was found that the catalytic activities of these complexes were remarkably influenced by the substituents on the α-carbon atoms.

Original languageEnglish
Pages (from-to)111-114
Number of pages4
JournalJournal of Organometallic Chemistry
Volume516
Issue number1-2
Publication statusPublished - 1996 Jun 14
Externally publishedYes

Fingerprint

X ray analysis
dienes
Polymerization
catalytic activity
Catalyst activity
Ethylene
ethylene
Carbon
polymerization
X-Rays
Oxidative Coupling
Gems
Atoms
Tin
synthesis
Zirconium
X-Ray Diffraction
Conformations
x rays
carbon

Keywords

  • Crystal structure
  • Ethylene polymerization
  • Metallacycle
  • Silicon
  • Tin
  • Zirconium

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry
  • Organic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

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title = "Novel zirconacyclopentadiene complex; 8,8-bis(cyclopentadienyl)-7,9-bis(trimethylstannyl)-8-zirconabicyclo-[4.3.0]nona-1(9),6(7)-diene: Synthesis, X-ray analysis, and catalytic activity for ethylene polymerization",
abstract = "Zirconacyclopentadiene complex 2c containing gem-dimetallated carbon atoms by zirconium and tin was prepared by the oxidative coupling reaction of 'Cp2Zr' with distannyldiyne compounds. Complex 2c having trimethylstannyl groups was characterized by X-ray diffraction and its structure was compared with zirconacyclopentadiene analogues having tert-butyl groups (2a) or trimethylsilyl groups (3). The five-membered zirconacycle ring of 2c has a planar conformation whereas it is twisted in complexes 2a and 3. The C-Zr-C angle in 2c is smaller than those of the corresponding 2a and 3. The polymerization of ethylene proceeded when these complexes were used in combination with methylaluminoxane and it was found that the catalytic activities of these complexes were remarkably influenced by the substituents on the α-carbon atoms.",
keywords = "Crystal structure, Ethylene polymerization, Metallacycle, Silicon, Tin, Zirconium",
author = "Kunihiro Oouchi and Makoto Mitani and Michiya Hayakawa and Tohru Yamada and Teruaki Mukaiyama",
year = "1996",
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TY - JOUR

T1 - Novel zirconacyclopentadiene complex; 8,8-bis(cyclopentadienyl)-7,9-bis(trimethylstannyl)-8-zirconabicyclo-[4.3.0]nona-1(9),6(7)-diene

T2 - Synthesis, X-ray analysis, and catalytic activity for ethylene polymerization

AU - Oouchi, Kunihiro

AU - Mitani, Makoto

AU - Hayakawa, Michiya

AU - Yamada, Tohru

AU - Mukaiyama, Teruaki

PY - 1996/6/14

Y1 - 1996/6/14

N2 - Zirconacyclopentadiene complex 2c containing gem-dimetallated carbon atoms by zirconium and tin was prepared by the oxidative coupling reaction of 'Cp2Zr' with distannyldiyne compounds. Complex 2c having trimethylstannyl groups was characterized by X-ray diffraction and its structure was compared with zirconacyclopentadiene analogues having tert-butyl groups (2a) or trimethylsilyl groups (3). The five-membered zirconacycle ring of 2c has a planar conformation whereas it is twisted in complexes 2a and 3. The C-Zr-C angle in 2c is smaller than those of the corresponding 2a and 3. The polymerization of ethylene proceeded when these complexes were used in combination with methylaluminoxane and it was found that the catalytic activities of these complexes were remarkably influenced by the substituents on the α-carbon atoms.

AB - Zirconacyclopentadiene complex 2c containing gem-dimetallated carbon atoms by zirconium and tin was prepared by the oxidative coupling reaction of 'Cp2Zr' with distannyldiyne compounds. Complex 2c having trimethylstannyl groups was characterized by X-ray diffraction and its structure was compared with zirconacyclopentadiene analogues having tert-butyl groups (2a) or trimethylsilyl groups (3). The five-membered zirconacycle ring of 2c has a planar conformation whereas it is twisted in complexes 2a and 3. The C-Zr-C angle in 2c is smaller than those of the corresponding 2a and 3. The polymerization of ethylene proceeded when these complexes were used in combination with methylaluminoxane and it was found that the catalytic activities of these complexes were remarkably influenced by the substituents on the α-carbon atoms.

KW - Crystal structure

KW - Ethylene polymerization

KW - Metallacycle

KW - Silicon

KW - Tin

KW - Zirconium

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