Sanford, Melanie S. and Henling, Lawrence M. and Grubbs, Robert H. (1998) Synthesis and Reactivity of Neutral and Cationic Ruthenium(II) Tris(pyrazolyl)borate Alkylidenes. Organometallics, 17 (24). pp. 5384-5389. ISSN 0276-7333. https://resolver.caltech.edu/CaltechAUTHORS:20180518-151133371
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Abstract
A series of neutral and cationic ruthenium(II) alkylidenes containing the hydrotris(pyrazolyl)borate (Tp) ligand have been prepared. The complex Tp(PCy_3)(Cl)Ru=CHPh (2) was obtained by the reaction of (PCy_3)_2(Cl)_2Ru=CHPh (1) and KTp. Treatment of 2 with AgBF_4 or AgSbF_6 in the presence of a variety of coordinating solvents afforded [Tp(PCy_3)(L)Ru=CHPh]^+ (L = H_2O, CH_3CN, pyridine) in high yield. The dynamic NMR behavior of these new complexes is discussed, and the X-ray crystal structure of [Tp(PCy_3)(H_2O)Ru=CHPh]BF_4 (3) is reported. Alkylidenes 2−5 alone do not catalyze olefin metathesis reactions. However, complex 2 is activated for ring-closing metathesis by the addition of HCl, CuCl, and AlCl_3.
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| Additional Information: | © 1998 American Chemical Society. Received August 11, 1998. Support has been provided by the National Science Foundation. M.S.S. is grateful to the California Institute of Technology for an Institute fellowship. | |||||||||
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| Issue or Number: | 24 | |||||||||
| Record Number: | CaltechAUTHORS:20180518-151133371 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20180518-151133371 | |||||||||
| Official Citation: | Synthesis and Reactivity of Neutral and Cationic Ruthenium(II) Tris(pyrazolyl)borate Alkylidenes Melanie S. Sanford, Lawrence M. Henling, and Robert H. Grubbs Organometallics 1998 17 (24), 5384-5389 DOI: 10.1021/om980683f | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 86470 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 21 May 2018 15:33 | |||||||||
| Last Modified: | 03 Oct 2019 19:44 |
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