Annulation reactions of Fischer carbene complexes tethered on a chalcogen-stabilized iron carbonyl cluster: Dependence of reaction pathway on chalcogen atom

DSpace/Manakin Repository

Annulation reactions of Fischer carbene complexes tethered on a chalcogen-stabilized iron carbonyl cluster: Dependence of reaction pathway on chalcogen atom

Show full item record

Title: Annulation reactions of Fischer carbene complexes tethered on a chalcogen-stabilized iron carbonyl cluster: Dependence of reaction pathway on chalcogen atom
Author: MATHUR, P; GHOSH, S; SARKAR, A; THONE, C
Abstract: When a benzene solution containing the Fischer carbene complex [(CO)(6)Fe2Se2{mu-C(Ph)= C-C(OEt)=Cr(CO)(5)}] (6) and phenylacetylene, diphenylacetylene, 1-hexyne, or 3-hexyne is subjected to reflux, the substituted cyclopentadienylchromium complexes [Fe-2(CO)(6)Se-2{mu-(Co)(3)Cr(eta(5)-C-5(R)(R')(Ph)(OEt)}] (8a R = H, R' = Ph; 8b R, R' = Ph; 8c R = H, R' = (CH2)(3)-CH3; and 8d R, R' = C2H5) are formed in 72-79% yield. The corresponding SSe analogue [(Co)(6)Fe2SSe{mu-C(Ph)=C-C(OEt)=Cr(CO)(5)}] (7) reacts with phenylacetylene or diphenylacetylene to form [Fe-2(CO)(6)SSe{mu-C(H)C(O)C(H)=C(eta(6)-C6H6Cr(CO)(3))C(Ph)}] (9a) or [Fe-2(CO)(6)-SSe{mu-C(H)C(O)C(Ph)=C(eta(6)-C6H5Cr(CO)(3))C(PhP}] (9b) in high yields (82% and 85%). All new compounds have been characterized by IR and H-1, C-13, and Se-77 NMR spectroscopy, and structural types were unequivocally established by crystallographic analysis of compounds 8b and 9b.
URI: http://dx.doi.org/10.1021/om980338q
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3721
http://hdl.handle.net/10054/3721
Date: 1998


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show full item record

Search DSpace


Advanced Search

Browse

My Account