Migratory insertion in N-heterocyclic carbene-containing Fe carbonyl complexes: an experimental and theoretical study.
The compound [Fe(eta-C5H5)(CO)2(Me)] reacts thermally with N-heterocyclic carbenes (L) to give both alkyl, [Fe(eta-C5H5)(L)(CO)(Me)], and acyl, [Fe(eta-C5H5)(L)(CO)(COMe)], derivatives. The reaction temperature has been shown to affect the product distribution. The alkyl and acyl derivatives exist i...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2006
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| _version_ | 1797055626150412288 |
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| author | Llewellyn, SA Green, M Green, J Cowley, A |
| author_facet | Llewellyn, SA Green, M Green, J Cowley, A |
| author_sort | Llewellyn, SA |
| collection | OXFORD |
| description | The compound [Fe(eta-C5H5)(CO)2(Me)] reacts thermally with N-heterocyclic carbenes (L) to give both alkyl, [Fe(eta-C5H5)(L)(CO)(Me)], and acyl, [Fe(eta-C5H5)(L)(CO)(COMe)], derivatives. The reaction temperature has been shown to affect the product distribution. The alkyl and acyl derivatives exist in an equilibrium that is more easily perturbed than in the tertiary phosphine analogues. DFT studies on the reactivity of [Fe(eta-C5H5)(CO)2(Me)] with PH3 and dihydroimidazole-2-ylidene (IH) have shown that CO exchange is energetically favoured for IH, and energetically disfavoured for PH3. The products of CO-induced migratory insertion, [Fe(eta-C5H5)(L)(CO)(COMe)], are more stable than the parent alkyl, [Fe(eta-C5H5)(L)(CO)(Me)], compounds. This stabilisation is larger when L = IH than when L = PH3. Stabilisation of the transition state by agostic interactions was seen in both instances, but this was significantly more pronounced for L = IH. |
| first_indexed | 2024-03-06T19:12:32Z |
| format | Journal article |
| id | oxford-uuid:173f1a56-0e54-4c07-abea-644f8b07fbfb |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:12:32Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:173f1a56-0e54-4c07-abea-644f8b07fbfb2022-03-26T10:36:06ZMigratory insertion in N-heterocyclic carbene-containing Fe carbonyl complexes: an experimental and theoretical study.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:173f1a56-0e54-4c07-abea-644f8b07fbfbEnglishSymplectic Elements at Oxford2006Llewellyn, SAGreen, MGreen, JCowley, AThe compound [Fe(eta-C5H5)(CO)2(Me)] reacts thermally with N-heterocyclic carbenes (L) to give both alkyl, [Fe(eta-C5H5)(L)(CO)(Me)], and acyl, [Fe(eta-C5H5)(L)(CO)(COMe)], derivatives. The reaction temperature has been shown to affect the product distribution. The alkyl and acyl derivatives exist in an equilibrium that is more easily perturbed than in the tertiary phosphine analogues. DFT studies on the reactivity of [Fe(eta-C5H5)(CO)2(Me)] with PH3 and dihydroimidazole-2-ylidene (IH) have shown that CO exchange is energetically favoured for IH, and energetically disfavoured for PH3. The products of CO-induced migratory insertion, [Fe(eta-C5H5)(L)(CO)(COMe)], are more stable than the parent alkyl, [Fe(eta-C5H5)(L)(CO)(Me)], compounds. This stabilisation is larger when L = IH than when L = PH3. Stabilisation of the transition state by agostic interactions was seen in both instances, but this was significantly more pronounced for L = IH. |
| spellingShingle | Llewellyn, SA Green, M Green, J Cowley, A Migratory insertion in N-heterocyclic carbene-containing Fe carbonyl complexes: an experimental and theoretical study. |
| title | Migratory insertion in N-heterocyclic carbene-containing Fe carbonyl complexes: an experimental and theoretical study. |
| title_full | Migratory insertion in N-heterocyclic carbene-containing Fe carbonyl complexes: an experimental and theoretical study. |
| title_fullStr | Migratory insertion in N-heterocyclic carbene-containing Fe carbonyl complexes: an experimental and theoretical study. |
| title_full_unstemmed | Migratory insertion in N-heterocyclic carbene-containing Fe carbonyl complexes: an experimental and theoretical study. |
| title_short | Migratory insertion in N-heterocyclic carbene-containing Fe carbonyl complexes: an experimental and theoretical study. |
| title_sort | migratory insertion in n heterocyclic carbene containing fe carbonyl complexes an experimental and theoretical study |
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