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Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products
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| Zeitschriftentitel: | Zeitschrift für Naturforschung B |
|---|---|
| Personen und Körperschaften: | , , , |
| In: | Zeitschrift für Naturforschung B, 66, 2011, 4, S. 371-377 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Walter de Gruyter GmbH
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| Schlagwörter: |
| author_facet |
Holschumacher, Dirk Daniliuc, Constantin G. Jones, Peter G. Tamm, Matthias Holschumacher, Dirk Daniliuc, Constantin G. Jones, Peter G. Tamm, Matthias |
|---|---|
| author |
Holschumacher, Dirk Daniliuc, Constantin G. Jones, Peter G. Tamm, Matthias |
| spellingShingle |
Holschumacher, Dirk Daniliuc, Constantin G. Jones, Peter G. Tamm, Matthias Zeitschrift für Naturforschung B Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products General Chemistry |
| author_sort |
holschumacher, dirk |
| spelling |
Holschumacher, Dirk Daniliuc, Constantin G. Jones, Peter G. Tamm, Matthias 1865-7117 0932-0776 Walter de Gruyter GmbH General Chemistry http://dx.doi.org/10.1515/znb-2011-0406 <jats:p>Frustrated Lewis pairs consisting of N-heterocyclic carbenes (NHC) and the borane B(C<jats:sub>6</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub> react with elemental sulfur or selenium to give products of the type NHC-E-B(C<jats:sub>6</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub>, where E is S or Se. Three such products, two with sulfur and one with selenium, were characterized by X-ray diffraction and shown to exhibit considerable conformational flexibility, as revealed by differing torsion angles in the atom sequence N-C-E-B-Cipso-Cortho. In the sulfur derivatives, the S-B bonds are all long (ca. 2.05 Å), and the C-S bonds (ca. 1.73 Å) are clearly lengthened compared to imidazole-2-thiones. The Se-B distance of 2.2111 Å is the first selenone-borane bond length to be determined by X-ray analysis.</jats:p> Sulfur and SeleniumActivation by Frustrated NHC/B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub> Lewis Pairs; Conformational Flexibility of Products Zeitschrift für Naturforschung B |
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| title |
Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| title_unstemmed |
Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| title_full |
Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| title_fullStr |
Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| title_full_unstemmed |
Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| title_short |
Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| title_sort |
sulfur and seleniumactivation by frustrated nhc/b(c<sub>6</sub>f<sub>5</sub>)<sub>3</sub> lewis pairs; conformational flexibility of products |
| topic |
General Chemistry |
| url |
http://dx.doi.org/10.1515/znb-2011-0406 |
| publishDate |
2011 |
| physical |
371-377 |
| description |
<jats:p>Frustrated Lewis pairs consisting of N-heterocyclic carbenes (NHC) and the borane B(C<jats:sub>6</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub> react with elemental sulfur or selenium to give products of the type NHC-E-B(C<jats:sub>6</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub>, where E is S or Se. Three such products, two with sulfur and one with selenium, were characterized by X-ray diffraction and shown to exhibit considerable conformational flexibility, as revealed by differing torsion angles in the atom sequence N-C-E-B-Cipso-Cortho. In the sulfur derivatives, the S-B bonds are all long (ca. 2.05 Å), and the C-S bonds (ca. 1.73 Å) are clearly lengthened compared to imidazole-2-thiones. The Se-B distance of 2.2111 Å is the first selenone-borane bond length to be determined by X-ray analysis.</jats:p> |
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| author | Holschumacher, Dirk, Daniliuc, Constantin G., Jones, Peter G., Tamm, Matthias |
| author_facet | Holschumacher, Dirk, Daniliuc, Constantin G., Jones, Peter G., Tamm, Matthias, Holschumacher, Dirk, Daniliuc, Constantin G., Jones, Peter G., Tamm, Matthias |
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| description | <jats:p>Frustrated Lewis pairs consisting of N-heterocyclic carbenes (NHC) and the borane B(C<jats:sub>6</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub> react with elemental sulfur or selenium to give products of the type NHC-E-B(C<jats:sub>6</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub>, where E is S or Se. Three such products, two with sulfur and one with selenium, were characterized by X-ray diffraction and shown to exhibit considerable conformational flexibility, as revealed by differing torsion angles in the atom sequence N-C-E-B-Cipso-Cortho. In the sulfur derivatives, the S-B bonds are all long (ca. 2.05 Å), and the C-S bonds (ca. 1.73 Å) are clearly lengthened compared to imidazole-2-thiones. The Se-B distance of 2.2111 Å is the first selenone-borane bond length to be determined by X-ray analysis.</jats:p> |
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| institution | DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1 |
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| physical | 371-377 |
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| spelling | Holschumacher, Dirk Daniliuc, Constantin G. Jones, Peter G. Tamm, Matthias 1865-7117 0932-0776 Walter de Gruyter GmbH General Chemistry http://dx.doi.org/10.1515/znb-2011-0406 <jats:p>Frustrated Lewis pairs consisting of N-heterocyclic carbenes (NHC) and the borane B(C<jats:sub>6</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub> react with elemental sulfur or selenium to give products of the type NHC-E-B(C<jats:sub>6</jats:sub>F<jats:sub>5</jats:sub>)<jats:sub>3</jats:sub>, where E is S or Se. Three such products, two with sulfur and one with selenium, were characterized by X-ray diffraction and shown to exhibit considerable conformational flexibility, as revealed by differing torsion angles in the atom sequence N-C-E-B-Cipso-Cortho. In the sulfur derivatives, the S-B bonds are all long (ca. 2.05 Å), and the C-S bonds (ca. 1.73 Å) are clearly lengthened compared to imidazole-2-thiones. The Se-B distance of 2.2111 Å is the first selenone-borane bond length to be determined by X-ray analysis.</jats:p> Sulfur and SeleniumActivation by Frustrated NHC/B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub> Lewis Pairs; Conformational Flexibility of Products Zeitschrift für Naturforschung B |
| spellingShingle | Holschumacher, Dirk, Daniliuc, Constantin G., Jones, Peter G., Tamm, Matthias, Zeitschrift für Naturforschung B, Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products, General Chemistry |
| title | Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| title_full | Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| title_fullStr | Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| title_full_unstemmed | Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| title_short | Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| title_sort | sulfur and seleniumactivation by frustrated nhc/b(c<sub>6</sub>f<sub>5</sub>)<sub>3</sub> lewis pairs; conformational flexibility of products |
| title_unstemmed | Sulfur and SeleniumActivation by Frustrated NHC/B(C6F5)3 Lewis Pairs; Conformational Flexibility of Products |
| topic | General Chemistry |
| url | http://dx.doi.org/10.1515/znb-2011-0406 |