No abstract

No abstract

The propargyl alcohols RC 2 C(H)(OH)RЈ (R = H, RЈ = Et; R = Me, RЈ = Et; R = Et, RЈ = Me; R = Ph, RЈ = Pr i ) reacted with [Fe 3 (CO) 12 ] in hydrocarbon solvents to give, as the final products, binuclear "ferrole" derivativesalcohol] in several isomers. Small amounts of tri-and penta-nuclear complexes were also obtained. In particular, when R = H or Ph trinuclear complexes [Fe 3 (CO) 9 -(µ-CO)L] 1 with a "parallel" alkyne ligand could be isolated and characterized by IR and NMR spectroscopies and mass spectrometry. When R = Me or Et the "bow tie" acetylide complexes [Fe 5 (CO) 14 (C 2 R) 2 ] (R = Me 2a or Et 2b) were isolated; their structures were determined by X-ray diffraction. The complexes 2a and 2b are formed by two Fe 3 triangles sharing a common vertex: each triangle is co-ordinated in a perpendicular fashion by an acetylide fragment and the carbon of one of the acetylide ligands is bound to four iron atoms. Complexes 2 are new examples of an uncommon type of cluster framework; they are presumably formed upon condensation of metal fragments generated by triiron dodecacarbonyl and upon cleavage of a carbon-carbon bond α to the alkyne triple bond. Possible formation mechanisms are discussed.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.