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Synthesis and Reactivity of Neutral and Cationic Ruthenium(II) Tris(pyrazolyl)borate Alkylidenes

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://dx.doi.org/10.1021/om980683fDOIArticle
https://pubs.acs.org/doi/suppl/10.1021/om980683fPublisherSupporting Information
ORCID:
AuthorORCID
Sanford, Melanie S.0000-0001-9342-9436
Grubbs, Robert H.0000-0002-0057-7817
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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