Premium
Titanocene Silylpropyne Complexes: Promising Intermediates en route to a Four‐Membered 1‐Metallacyclobuta‐2,3‐diene?
Author(s) -
Reiß Fabian,
Reiß Melanie,
Spannenberg Anke,
Jiao Haijun,
Hollmann Dirk,
Arndt Perdita,
Rosenthal Uwe,
Beweries Torsten
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201703444
Subject(s) - alkyne , allene , chemistry , isomerization , alkyl , stereochemistry , medicinal chemistry , catalysis , organic chemistry
Coordination of the alkyl‐substituted alkynes Me 3 SiC 2 CH 2 R ( 1 : R=SiMe 3 ; 2 : R=N(SiMe 3 ) 2 ) to titanocene centres [Cp′ 2 Ti] (Cp′=Cp, Cp*) yields stable alkyne complexes of the type Cp′ 2 Ti(η 2 ‐Me 3 SiC 2 CH 2 R) ( 3 : Cp′=Cp, R=SiMe 3 ; 5 : Cp′=Cp, R=N(SiMe 3 ) 2 ; 6 : Cp′=Cp*, R=SiMe 3 ) that are not prone to alkyne/allene isomerisation. When reacting alkyne 2 with Cp * 2 TiCl 2 and Mg formation of the complex Cp* 2 Ti(III)(η 3 ‐Me 3 SiC 2 CH 2 ) ( 7 ) which displays a propargylic unit coordinated to the Ti III centre takes place. All complexes were fully characterised, the molecular structures for 5 , 6 , and 7 are discussed.