Journal article

Publication year: 1997

Pages: 3965-3972

Journal: Organometallics

Volume number: 16

Issue number: 18

ISSN: 0276-7333

DOI Link: https://doi.org/10.1021/om970070n

Publisher: American Chemical Society

Abstract: 
Treatment of anionic acetylide complexes [(eta(5)-C5H5)(NO)(CO)WC=CR](-)[R=Si(CH3)(3) (3), C(CH3)(3) (11a), or C6H5 (11b)] with allylic iodides 4b, 14, methallyl iodide, and 3-iodocyclohexene in THF at 0 degrees C afforded the corresponding eta(1)-alkynyl-eta(3)-allyl complexes 5/6, 12/13, and 15-19. The formation of these eta(3)-allyl complexes is rationalized by the electrophilic attack on the metal center of acetylide complexes to create a eta(1)-allyl complex, which is further stabilized by elimination of a CO ligand. The eta(3)-allyl complexes 12a/13a, 12b/13b, 18a, and 19a undergo a surface-catalyzed isomerization on silica gel as well as neutral alumina to the (eta(2)-allene)tungsten complexes 20-23. The crystal structures of complexes 17b and 20 are reported.

Harvard Citation style: Ipaktschi, J., Mirzaei, F., DemuthEberle, G., Beck, J. and Serafin, M. (1997) eta(2)-alkynyl and vinylidene transition metal complexes .4. Reaction of the metal-acetylide [(eta(5)-C5H5)(NO)(CO)WC CR](-) with allyl halides to give eta(3)-allyl complexes. (eta(1)-alkynyl-eta(3)-allyl)tungsten complexes: Preparation and surface-catalyzed isomerization, Organometallics, 16(18), pp. 3965-3972. https://doi.org/10.1021/om970070n

APA Citation style: Ipaktschi, J., Mirzaei, F., DemuthEberle, G., Beck, J., & Serafin, M. (1997). eta(2)-alkynyl and vinylidene transition metal complexes .4. Reaction of the metal-acetylide [(eta(5)-C5H5)(NO)(CO)WC CR](-) with allyl halides to give eta(3)-allyl complexes. (eta(1)-alkynyl-eta(3)-allyl)tungsten complexes: Preparation and surface-catalyzed isomerization. Organometallics. 16(18), 3965-3972. https://doi.org/10.1021/om970070n