Iron pentacarbonyl promoted addition of CO and MeOH to 1,4-disubstituted-1,3-butadiyne and formation of vinylallyl and butatriene ligand systems

Mathur, Pradeep ; Avasare, Vidya D. ; Mobin, Shaikh M. (2009) Iron pentacarbonyl promoted addition of CO and MeOH to 1,4-disubstituted-1,3-butadiyne and formation of vinylallyl and butatriene ligand systems Journal of Cluster Science, 20 (2). pp. 399-415. ISSN 1040-7278

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Official URL: http://www.springerlink.com/index/C15P0N23J568621R...

Related URL: http://dx.doi.org/10.1007/s10876-009-0247-4

Abstract

Photochemical reaction of methanol solution containing 1,4-diferrocenyl- or 1,4-diphenyl-1,3-butadiynes and iron pentacarbonyl into which CO was constantly bubbled, yielded diiron hexacarbonyl complexes of cumulene ligand systems, [η1: η3-{RCHC2CR(COOMe)}Fe2(CO)6] (1; E, R = Fc, 2; Z, R = Fc, 5; E, R = Ph, 6; Z, R = Ph) and [η3: η3-{RCHC2CR(COOMe)}Fe2(CO)6] (3; E, R = Fc, 7; E, R = Ph), formed by 1,4-addition of -COOMe and -H to the butadiynes. Additionally, diferrole, [Fe(CO)4{C(O)CC(Fc)C(O)}2],4 was obtained in minor quantity. Compounds 1, 2, 5 and 6 contain vinylallyl carbon framework which is stabilized by MeOC=O → Fe bond along with η1: η3 coordinated Fe2(CO)6 unit. Compounds 3 and 7 contain butatriene units which are stabilized by η3: η3 coordinated Fe2(CO)6 unit. Characterization of the new compounds was carried out by IR and 1H and 13C NMR spectroscopy and by mass spectrometry. Molecular structures of 2-7 were established by single crystal X-ray diffraction methods.

Item Type:Article
Source:Copyright of this article belongs to Springer-Verlag.
Keywords:Iron; Carbonyl; Vinylallyl; Butatriene
ID Code:24890
Deposited On:01 Dec 2010 12:31
Last Modified:01 Dec 2010 12:31

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