124417-94-3Relevant academic research and scientific papers
Palladium-catalyzed acylation and/or homo-coupling of aryl- and alkyl-acetylenes
Perrone, Serena,Bona, Fabio,Troisi, Luigino
experimental part, p. 7386 - 7391 (2011/10/09)
Allyl or benzyl halides, through a Pd(0)-catalyzed reaction and under CO pressure, generate acyl-palladium/halides that, in the presence of a base and an aryl- and alkyl-acetylene, undergo nucleophilic acyl substitution giving conjugated acetylenic ketones. Diynes, resulting from alkyne/alkyne homo-coupling, were instead the main products in reactions performed without allyl or benzyl halides. Moreover, dimerization, trimerization, and cyclotrimerization reactions of acetylenes were observed in reaction carried out even without base.
Novel acetylene-linked di-cobalt and tetra-cobalt carbonyl clusters
Draper, Sylvia M.,Delamesiere, Marika,Champeil, Elise,Twamley, Brendan,Byrne, Janice J.,Long, Conor
, p. 157 - 167 (2007/10/03)
{Co2(CO)6} groups were attached to p-diethynylbenzene-based acetylenes giving complexes of general formula [{Co2(CO)6}(μ2-η2:2-RC 2C6H4C2R′)] ((4): R=R′=H; (4a): R=SiMe3, R′=H; (4b): R=R′=SiMe3); [{Co2(CO)6}2(μ4-η 2:2:2:2-RC2C6H4C 2R′)] ((3): R=R′=H; (3a): R=SiMe3, R′=H; (3b): R=R′=SiMe3); [{Co2(CO)6}4(μ8-η 2:2:2:2:2:2:2:2-R2C6H4C 2C2C6H4C2R)]((5): R=H; (5b):R=SiMe3). The addition of Co4(CO)12 to p-diethynylbenzene and to 4 was also investigated, producing [{Co4(CO)8(μ-CO)2}(μ4-HC 2C6H4C2H)] (6) and [{Co2(CO)6}{(Co4(CO)8(μ-CO) 2}(μ8-HC2C6H4C 2H)] (7). The syntheses of the acetylenic derivatives of C60 [(trimethylsilyl)ethynyl]hydrofullerene[60] (8a) and (phenylethynyl)hydrofullerene[60] (9) and the new ligand [(trimethylsilyl)diethynylbenzene]hydrofullerene[60] (10a) were performed and the resulting acetylenes were reacted with dicobaltoctacarbonyl giving the corresponding complexes [(trimethylsilyl)(dicobalthexacarbonyl)ethynyl]hydrofullerene[60] (11a), (phenylethynyl)(dicobalthexacarbonyl)hydrofullerene[60] (12) and [(trimethylsilyl)bis(dicobalthexacarbonyl)diethynylbenzene] (13a). The reaction of 1-bromo-3,5-diethynylbenzene and 1,3,5-triethynylbenzene with dicobaltoctacarbonyl resulted in the formation of [HC2{Co2(CO)6}]2C6H 2Br (16) and [HC2{Co2(CO)6}]2C6H 3 (15) as expected. Crystals of 3a, 3b, 4, 4b, 15 and 16 suitable for single-crystal X-ray diffraction were grown and the molecular structures of these compounds are discussed.
