UNPRECEDENTED RHODIUM-MEDIATED TRIMERIZATION OF ALKYNES HC-CR (R=PH, P-TOLYL) LEADING TO (ETA(4)-CYCLOBUTADIENE)RHODIUM COMPLEXES

Authors
LAMATA MP SANJOSE E CARMONA D LAHOZ FJ ATENCIO R ORO LA
Citation
Mp. Lamata et al., UNPRECEDENTED RHODIUM-MEDIATED TRIMERIZATION OF ALKYNES HC-CR (R=PH, P-TOLYL) LEADING TO (ETA(4)-CYCLOBUTADIENE)RHODIUM COMPLEXES, Organometallics, 15(22), 1996, pp. 4852-4856
Citations number
30
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Organometallics → ACNP
ISSN journal
02767333
Volume
15
Issue
22
Year of publication
1996
Pages
4852 - 4856
Database
ISI
SICI code
0276-7333(1996)15:22<4852:URTOAH>2.0.ZU;2-M
Abstract
The alpha-amino acidate complex [(eta(5)-C(5)Me(5))Rh(L-alaninate)Cl] (1) reacts with HC=CR (R = Ph, p-tolyl), in methanol, in the presence of NEt(3), to form the new cyclobutadiene compounds [(eta(5)-C(5)Me(5) )Rh(eta(4)-C(4)HR(2)C=CR)] (R = Ph (2a), p-tolyl (2b)) as the major pr oducts. The X-ray molecular structure determination of complex 2a has been carried out. The complex exhibits a sandwichlike structure with t he rhodium metal located between a eta(4)-phenylethynyl cyclobutadiene ligand and a eta(5)-pentamethylcyclopentadienyl group. A possible pat hway for the formation of 2 from 1 is proposed.