Synthesis of Molybdenum and Tungsten Alkylidene Complexes That Contain the 2,6-Bis(2,4,6-triisopropylphenyl)phenylimido (NHIPT) Ligand
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Schrock_Synthesis of molybdenum.pdf
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Author(s)
Hoveyda, Amir H.
Axtell, Jonathan
Schrock, Richard Royce
Mueller, Peter
Date Issued
February 2015
Journal
Organometallics
Publisher
American Chemical Society (ACS)
Citation
Axtell, Jonathan C. et al. “Synthesis of Molybdenum and Tungsten Alkylidene Complexes That Contain the 2,6-Bis(2,4,6-Triisopropylphenyl)phenylimido (NHIPT) Ligand.” Organometallics 34.11 (2015): 2110–2113.
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Author's final manuscript
Abstract
Molybdenum and tungsten alkylidene complexes that contain the sterically demanding hexaisopropylterphenylimido ligand, N-2,6-(2,4,6-i-Pr[subscript 3]C[subscript 6]H[subscript 2])[subscript 2]C[subscript 6]H[subscript 3] (NHIPT), have been prepared from Mo(N-t-Bu)[subscript 2]Cl[subscript 2](1,2-dimethoxyethane) or W(N-t-Bu)[subscript 2]Cl[subscript 2](pyridine)[subscript 2], employing tert-butylimido ligands as sacrificial proton acceptors. These complexes include M(NHIPT)(CH-t-Bu)Cl[subscrip 2] (M = Mo, W), Mo(NHIPT)(CH-t-Bu)(pyrrolide)[subscript 2], and Mo(NHIPT)(CH-t-Bu)(pyrrolide)(OC[subscript 6]F[subscript 5])(CH[subscript 3]CN). In all cases only anti alkylidene isomers are observed in solution, as a consequence of the steric demands of the NHIPT ligand. An X-ray structure of W(NHIPT)(CH-t-Bu)Cl[subscript 2] showed it to be a monomer with a disordered alkylidene that is 86% in the anti configuration and 14% in the syn configuration.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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DOI of Published Version
https://doi.org/10.1021/om501213x
