Group 5 ansa-metallocenes: Structural and dynamic properties of tetrahydroborate complexes
The new compounds [Nb{(eta-C5H4)X(eta-C5H4)}Cl-2] (X = CEt2 1a, C(C5H10) 1b, C2Me4 1c), [Nb{(eta-(C5H3Bu)-Bu-t)C2Me4(eta-(C5H3Bu)-Bu-t)}Cl-2] 1d, [Nb{(eta-C5H4)X(eta-C5H4)}(eta(2)-BH4)] (X = CEt2 2a*, C(C5H10) 2b, C2Me4 2c*, SiMe2 2e*), [Nb((eta-(C5H3Bu)-Bu-t)C2Me4(eta-(C5H3Bu)-Bu-t)}(eta(2)-BH4)] (...
| Váldodahkkit: | , , , |
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| Materiálatiipa: | Journal article |
| Giella: | English |
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American Chemical Society
2000
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| _version_ | 1826281996298485760 |
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| author | Conway, S Doerrer, L Green, M Leech, M |
| author_facet | Conway, S Doerrer, L Green, M Leech, M |
| author_sort | Conway, S |
| collection | OXFORD |
| description | The new compounds [Nb{(eta-C5H4)X(eta-C5H4)}Cl-2] (X = CEt2 1a, C(C5H10) 1b, C2Me4 1c), [Nb{(eta-(C5H3Bu)-Bu-t)C2Me4(eta-(C5H3Bu)-Bu-t)}Cl-2] 1d, [Nb{(eta-C5H4)X(eta-C5H4)}(eta(2)-BH4)] (X = CEt2 2a*, C(C5H10) 2b, C2Me4 2c*, SiMe2 2e*), [Nb((eta-(C5H3Bu)-Bu-t)C2Me4(eta-(C5H3Bu)-Bu-t)}(eta(2)-BH4)] (2d*), [Nb{(eta-C5H4)X(eta-C5H4)}(eta(2)-BD4)] (X = C2Me4 3c, CMe2 4), and [V{(eta-C5H4)C2Me4(eta-C5H4)}(eta(2)-BH4)} (5*) have been prepared. The asterisk indicates the crystal structure has been determined. The hydrogen scrambling processes in the tetrahydroborate complexes 2a-e, 3c, 4, 5, and [Nb{(eta-C5H4)CMe2(eta-C5H4)}(eta(2)-BH4)] have been studied. The free energy barrier Delta G(double dagger) to bridge-terminal hydrogen exchange is considerably reduced when the bridging unit imposes significant structural changes in the metallocene. |
| first_indexed | 2024-03-07T00:37:12Z |
| format | Journal article |
| id | oxford-uuid:81d4950b-09db-4a96-96d4-4e06e81d1c07 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:37:12Z |
| publishDate | 2000 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:81d4950b-09db-4a96-96d4-4e06e81d1c072022-03-26T21:33:03ZGroup 5 ansa-metallocenes: Structural and dynamic properties of tetrahydroborate complexesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:81d4950b-09db-4a96-96d4-4e06e81d1c07Chemistry & allied sciencesInorganic chemistryOrganometallic ChemistryStructural chemistryEnglishOxford University Research Archive - ValetAmerican Chemical Society2000Conway, SDoerrer, LGreen, MLeech, MThe new compounds [Nb{(eta-C5H4)X(eta-C5H4)}Cl-2] (X = CEt2 1a, C(C5H10) 1b, C2Me4 1c), [Nb{(eta-(C5H3Bu)-Bu-t)C2Me4(eta-(C5H3Bu)-Bu-t)}Cl-2] 1d, [Nb{(eta-C5H4)X(eta-C5H4)}(eta(2)-BH4)] (X = CEt2 2a*, C(C5H10) 2b, C2Me4 2c*, SiMe2 2e*), [Nb((eta-(C5H3Bu)-Bu-t)C2Me4(eta-(C5H3Bu)-Bu-t)}(eta(2)-BH4)] (2d*), [Nb{(eta-C5H4)X(eta-C5H4)}(eta(2)-BD4)] (X = C2Me4 3c, CMe2 4), and [V{(eta-C5H4)C2Me4(eta-C5H4)}(eta(2)-BH4)} (5*) have been prepared. The asterisk indicates the crystal structure has been determined. The hydrogen scrambling processes in the tetrahydroborate complexes 2a-e, 3c, 4, 5, and [Nb{(eta-C5H4)CMe2(eta-C5H4)}(eta(2)-BH4)] have been studied. The free energy barrier Delta G(double dagger) to bridge-terminal hydrogen exchange is considerably reduced when the bridging unit imposes significant structural changes in the metallocene. |
| spellingShingle | Chemistry & allied sciences Inorganic chemistry Organometallic Chemistry Structural chemistry Conway, S Doerrer, L Green, M Leech, M Group 5 ansa-metallocenes: Structural and dynamic properties of tetrahydroborate complexes |
| title | Group 5 ansa-metallocenes: Structural and dynamic properties of tetrahydroborate complexes |
| title_full | Group 5 ansa-metallocenes: Structural and dynamic properties of tetrahydroborate complexes |
| title_fullStr | Group 5 ansa-metallocenes: Structural and dynamic properties of tetrahydroborate complexes |
| title_full_unstemmed | Group 5 ansa-metallocenes: Structural and dynamic properties of tetrahydroborate complexes |
| title_short | Group 5 ansa-metallocenes: Structural and dynamic properties of tetrahydroborate complexes |
| title_sort | group 5 ansa metallocenes structural and dynamic properties of tetrahydroborate complexes |
| topic | Chemistry & allied sciences Inorganic chemistry Organometallic Chemistry Structural chemistry |
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