Number of the records: 1

Dehydrocoupling of SiMe2H substituents in permethylated zirconocene complexes

SYSNO ASEP	0358453
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Dehydrocoupling of SiMe2H substituents in permethylated zirconocene complexes
Author(s)	Pinkas, Jiří (UFCH-W)_{RID, ORCID} Gyepes, R. (CZ) Císařová, I. (CZ) Kubišta, Jiří (UFCH-W)_{RID, ORCID} Mach, Karel (UFCH-W)_{ORCID, RID} Horáček, Michal (UFCH-W)_{RID, ORCID}
Source Title	Collection of Czechoslovak Chemical Communications. - : Ústav organické chemie a biochemie AV ČR, v. v. i. - ISSN 0010-0765 Roč. 76, č. 3 (2011), s. 177-191
Number of pages	15 s.
Language	eng - English
Country	CZ - Czech Republic
Keywords	metallocenes ; zirconium ; bridging ligands
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	IAA400400708 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	LC06070 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000288340200003
DOI	10.1135/cccc2010155
Annotation	Complex [Zr{η5-C5Me4(SiMe2H)}2Cl2] (1) was prepared by the reaction of lithium salt of 2,3,4,5-tetramethyl-1-(dimethylsilyl)cyclopenta-2,4-diene with [ZrCl4] in boiling THF. The reduction of 1 with excess magnesium in THF in the presence of excess bis(trimethylsilyl)acetylene (btmsa) afforded the bivalent metal ansa-disilylene complex with π-coordinated btmsa [Zr(η2-btmsa){η5-C5Me4(SiMe2)}2] (2). The dehydrocoupling of SiMe2H groups was accompanied by a hydrogen transfer to releasing btmsa to give a mixture of cis- and trans-1,2-bis(trimethylsilyl)ethene. Chlorination of 2 with PbCl2 afforded ansa-[Zr{η5-C5Me4(SiMe2)}2Cl2] (3) and liberated btmsa. The crystal structures of complexes, 1, 2 and 3 have been determined by X-ray crystallography.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2012

Number of the records: 1