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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/3775

Title: Coupling reactions of ferrocenylacetylene with mononuclear metal carbonyls Fe(CO)(5) and M(CO)(6) (M = Mo, W): Synthesis and characterization of [Fe(CO)(2){eta(5)-2,5-Fc(2)C(5)H(2)CO}C(Fc)=CH], [Fe(CO)(2){eta(2):eta(2)-2,5-Fc(2)C(4)H(2)Fe(CO)(3)}-mu-CO], [Fe(CO)(3){eta(2):eta(2)-2,5-Fc(2)C(4)H(2)CO}], 1,2,4-triferrocenylbenzene, 2,5-diferrocenylthiophene, and 2,5-diferrocenylselenophene
Authors: MATHUR, P
SINGH, AK
SINGH, VK
SINGH, P
RAHUL, R
MOBIN, SM
THONE, C
Keywords: catalytic transformations
crystal-structure
acetylide
complexes
clusters
ethynylferrocene
reactivity
thiiranes
ligands
route
Issue Date: 2005
Publisher: AMER CHEMICAL SOC
Citation: ORGANOMETALLICS, 24(20), 4793-4798
Abstract: Thermolysis of a benzene solution containing Fe(CO)5 and ferrocenylacetylene yielded three new compounds: [Fe(CO)(2){eta(2):eta(5)-2,5-Fc(2)C(4)H(2)CO}C(Fc)=CH] (1), [Fe(CO)(2){eta(2):eta(2)-2,5-Fc(2)C(4)H(2)Fe(CO)(3)}-mu-CO] (2), and [Fe(CO)(3){eta(2):eta(2)-2,5-FC2C4H2CO}] (3). When a benzene solution containing ferrocenylacetylene and M(CO)(6) (M = Mo, W) was refluxed, 1,2,4-triferrocenylbenzene (4) was formed. In contrast to the reaction of ferrocenylacetylene with Fe(CO)(5), which leads to cyclization with insertion of a CO molecule, in the reaction with M(CO)(6) no insertion of CO takes place during cyclization. However, if the reactions with M(CO)(6) are carried out in the presence of S-8-powder or Se-powder, insertion of these chalcogen atoms during cyclization does take place and 2,5-diferrocenylthiophene (5) and 2,5-diferrocenylselenophene (6) are formed respectively, along with 4. All new compounds were characterized by IR and H-1 and C-13 NMR spectroscopy. Structures of 1-5 were established by single-crystal X-ray crystallography.
URI: http://dx.doi.org/10.1021/om0504755
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3775
http://hdl.handle.net/10054/3775
ISSN: 0276-7333
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