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{
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- 作者：Pradeep Mathur ; Amrendra K. Singh ; Vinay K. Singh ; Priti Singh ; Rahul Rahul ; Shaikh M. Mobin ; and Carsten Thö ; ne
- 刊名：Organometallics
- 出版年：2005
- 出版时间：September 26, 2005
- 年：2005
- 卷：24
- 期：20
- 页码：4793 - 4798
- 全文大小：167K
- 年卷期：v.24,no.20(September 26, 2005)
- ISSN：1520-6041
文摘
Thermolysis of a benzene solution containing Fe(CO)5 and ferrocenylacetylene yielded threenew compounds: [Fe(CO)2{
fchars/eta.gif" BORDER=0 >5-2,5-Fc2C5H2CO}C(Fc)=CH] (1), [Fe(CO)2{fchars/eta.gif" BORDER=0 >2:fchars/eta.gif" BORDER=0 >2-2,5-Fc2C4H2Fe(CO)3}-
f">-CO] (2), and [Fe(CO)3{fchars/eta.gif" BORDER=0 >2:fchars/eta.gif" BORDER=0 >2-2,5-Fc2C4H2CO}] (3). When a benzene solutioncontaining 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 noinsertion of CO takes place during cyclization. However, if the reactions with M(CO)6 arecarried out in the presence of S8-powder or Se-powder, insertion of these chalcogen atomsduring cyclization does take place and 2,5-diferrocenylthiophene (5) and 2,5-diferrocenylselenophene (6) are formed respectively, along with 4. All new compounds were characterizedby IR and 1H and 13C NMR spectroscopy. Structures of 1-5 were established by single-crystal X-ray crystallography.
fchars/eta.gif" BORDER=0 >5-2,5-Fc2C5H2CO}C(Fc)=CH] (1), [Fe(CO)2{fchars/eta.gif" BORDER=0 >2:fchars/eta.gif" BORDER=0 >2-2,5-Fc2C4H2Fe(CO)3}-f">-CO] (2), and [Fe(CO)3{fchars/eta.gif" BORDER=0 >2:fchars/eta.gif" BORDER=0 >2-2,5-Fc2C4H2CO}] (3). When a benzene solutioncontaining 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 noinsertion of CO takes place during cyclization. However, if the reactions with M(CO)6 arecarried out in the presence of S8-powder or Se-powder, insertion of these chalcogen atomsduring cyclization does take place and 2,5-diferrocenylthiophene (5) and 2,5-diferrocenylselenophene (6) are formed respectively, along with 4. All new compounds were characterizedby IR and 1H and 13C NMR spectroscopy. Structures of 1-5 were established by single-crystal X-ray crystallography.