NMR Study of the Interaction of Trinitrobenzene with High-Spin Tetraarylporphinato-Iron(II1) Halides
The interaction of several high-spin p-substituted tetraphenylporphinato-iron(III) halide complexes (p-R-TPPFeX) with the aromatic π acceptor, 1,3,5-trinitrobenzene (TNB) has been studied by proton and 13C NMR. The averaged TNB shifts and line-widths are indicative of 1:1 complexes whose stability i...
محفوظ في:
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | |
| التنسيق: | article |
| منشور في: |
1981
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| الوصول للمادة أونلاين: | http://hdl.handle.net/10725/3331 http://dx.doi.org/10.1016/0022-2364(81)90084-6 http://www.sciencedirect.com/science/article/pii/0022236481900846 |
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إضافة وسم
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| _version_ | 1864513460972290048 |
|---|---|
| author | Kabbani, Ahmad T. |
| author2 | La Mar, Gred N. |
| author2_role | author |
| author_facet | Kabbani, Ahmad T. La Mar, Gred N. |
| author_role | author |
| dc.creator.none.fl_str_mv | Kabbani, Ahmad T. La Mar, Gred N. |
| dc.date.none.fl_str_mv | 1981 2016-03-15T11:50:04Z 2016-03-15T11:50:04Z 2016-03-15 |
| dc.identifier.none.fl_str_mv | 1090-7807 http://hdl.handle.net/10725/3331 http://dx.doi.org/10.1016/0022-2364(81)90084-6 Kabbani, A. T., & La Mar, G. N. (1981). NMR study of the interaction of trinitrobenzene with high-spin tetraarylporphinato-iron (III) halides: Structure determination of the 1: 1 adduct based on dipolar relaxation. Journal of Magnetic Resonance (1969), 43(1), 90-100. http://www.sciencedirect.com/science/article/pii/0022236481900846 |
| dc.relation.none.fl_str_mv | Journal of Magnetic Renaissance |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.title.none.fl_str_mv | NMR Study of the Interaction of Trinitrobenzene with High-Spin Tetraarylporphinato-Iron(II1) Halides Structure Determination of the 1:l Adduct Based on Dipolar Relaxation |
| dc.type.none.fl_str_mv | Article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | The interaction of several high-spin p-substituted tetraphenylporphinato-iron(III) halide complexes (p-R-TPPFeX) with the aromatic π acceptor, 1,3,5-trinitrobenzene (TNB) has been studied by proton and 13C NMR. The averaged TNB shifts and line-widths are indicative of 1:1 complexes whose stability is decreased by more electron-withdrawing axial halides or phenyl substituents, consistent with the porphyrin acting as a π donor in the adduct. Quantitative evaluation of both proton and 13C relaxation rate ratios in the 1:1 adduct show that a unique structure can be determined solely from relaxation data. The resulting structure is physically reasonable in that it places the TNB ∼ 3 Å from the porphyrin plane on the opposite side of the chloride ligand and approximately over the pyrrole nitrogen, with the NO2 group pointing away from the iron. The absence of any axial interaction in the adduct indicates its structure represents a π complex. The structure, however, does not allow one to differentiate between electronic and steric effects in decreasing the affinity of the iron for a sixth axial ligand. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | LAURepo_c3d86456d2bfa52aef3ca4a915377465 |
| identifier_str_mv | 1090-7807 Kabbani, A. T., & La Mar, G. N. (1981). NMR study of the interaction of trinitrobenzene with high-spin tetraarylporphinato-iron (III) halides: Structure determination of the 1: 1 adduct based on dipolar relaxation. Journal of Magnetic Resonance (1969), 43(1), 90-100. |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/3331 |
| publishDate | 1981 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | NMR Study of the Interaction of Trinitrobenzene with High-Spin Tetraarylporphinato-Iron(II1) HalidesStructure Determination of the 1:l Adduct Based on Dipolar RelaxationKabbani, Ahmad T.La Mar, Gred N.The interaction of several high-spin p-substituted tetraphenylporphinato-iron(III) halide complexes (p-R-TPPFeX) with the aromatic π acceptor, 1,3,5-trinitrobenzene (TNB) has been studied by proton and 13C NMR. The averaged TNB shifts and line-widths are indicative of 1:1 complexes whose stability is decreased by more electron-withdrawing axial halides or phenyl substituents, consistent with the porphyrin acting as a π donor in the adduct. Quantitative evaluation of both proton and 13C relaxation rate ratios in the 1:1 adduct show that a unique structure can be determined solely from relaxation data. The resulting structure is physically reasonable in that it places the TNB ∼ 3 Å from the porphyrin plane on the opposite side of the chloride ligand and approximately over the pyrrole nitrogen, with the NO2 group pointing away from the iron. The absence of any axial interaction in the adduct indicates its structure represents a π complex. The structure, however, does not allow one to differentiate between electronic and steric effects in decreasing the affinity of the iron for a sixth axial ligand.N/AN/A2016-03-15T11:50:04Z2016-03-15T11:50:04Z19812016-03-15Articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1090-7807http://hdl.handle.net/10725/3331http://dx.doi.org/10.1016/0022-2364(81)90084-6Kabbani, A. T., & La Mar, G. N. (1981). NMR study of the interaction of trinitrobenzene with high-spin tetraarylporphinato-iron (III) halides: Structure determination of the 1: 1 adduct based on dipolar relaxation. Journal of Magnetic Resonance (1969), 43(1), 90-100.http://www.sciencedirect.com/science/article/pii/0022236481900846Journal of Magnetic Renaissanceinfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/33312016-08-16T10:38:26Z |
| spellingShingle | NMR Study of the Interaction of Trinitrobenzene with High-Spin Tetraarylporphinato-Iron(II1) Halides Kabbani, Ahmad T. |
| status_str | publishedVersion |
| title | NMR Study of the Interaction of Trinitrobenzene with High-Spin Tetraarylporphinato-Iron(II1) Halides |
| title_full | NMR Study of the Interaction of Trinitrobenzene with High-Spin Tetraarylporphinato-Iron(II1) Halides |
| title_fullStr | NMR Study of the Interaction of Trinitrobenzene with High-Spin Tetraarylporphinato-Iron(II1) Halides |
| title_full_unstemmed | NMR Study of the Interaction of Trinitrobenzene with High-Spin Tetraarylporphinato-Iron(II1) Halides |
| title_short | NMR Study of the Interaction of Trinitrobenzene with High-Spin Tetraarylporphinato-Iron(II1) Halides |
| title_sort | NMR Study of the Interaction of Trinitrobenzene with High-Spin Tetraarylporphinato-Iron(II1) Halides |
| url | http://hdl.handle.net/10725/3331 http://dx.doi.org/10.1016/0022-2364(81)90084-6 http://www.sciencedirect.com/science/article/pii/0022236481900846 |