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Kamitani M, Pinter B, Searles K, Crestani MG, Hickey A, Manor BC, Carroll PJ, Mindiola DJ. Phosphinoalkylidene and -alkylidyne Complexes of Titanium: Intermolecular C-H Bond Activation and Dehydrogenation Reactions. J Am Chem Soc 2015; 137:11872-5. [PMID: 26302157 DOI: 10.1021/jacs.5b06973] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The ethylene complex (PNP)Ti(η(2)-H2C═CH2)(CH2(t)Bu) or (PNP)Ti═CH(t)Bu(CH2(t)Bu) (PNP(-) = N[2-P(CHMe2)2-4-methylphenyl]2) reacts with H2CPPh3 to form the κ(2)-phosphinoalkylidene (PNP)Ti═CHPPh2(Ph) (1). Compound 1 activates benzene via the transient intermediate [(PNP)Ti≡CPPh2] (C). By treatment of (PNP)Ti═CH(t)Bu(OTf) with LiCH2PPh2, 1 or its isotopologue (PNP)Ti═CDPPh2(C6D5) (1-d6) can be produced by an independent route involving intermediate C, which activates benzene or benzene-d6 and dehydrogenates cyclohexane-d12. Addition of MeOTf to 1 results in elimination of benzene concomitant with the formation of the phosphonioalkylidyne complex, [(PNP)Ti≡CPPh2Me(OTf) (2). Theoretical studies of 2 suggest a resonance structure having dominant Ti-C triple-bond character with some contribution also from a C-P multiple bond.
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Affiliation(s)
- Masahiro Kamitani
- Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Balazs Pinter
- Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Keith Searles
- Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Marco G Crestani
- Department of Chemistry and Molecular Structure Center, Indiana University , Bloomington, Indiana 47405, United States
| | - Anne Hickey
- Department of Chemistry and Molecular Structure Center, Indiana University , Bloomington, Indiana 47405, United States
| | - Brian C Manor
- Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J Carroll
- Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Daniel J Mindiola
- Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
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Gessner VH, Becker J, Feichtner KS. Carbene Complexes Based on Dilithium Methandiides. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500051] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Explanation of Different Regioselectivities in theortho-Lithiation of Ferrocenyl(phenyl)methanamines. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201325] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Deacon GB, Greenhill NB, Junk PC, Wiecko M. Synthesis and crystal structure of lithium alendronate. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.538389] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Glen B. Deacon
- a School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
| | - Neil B. Greenhill
- a School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
| | - Peter C. Junk
- a School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
| | - Michal Wiecko
- a School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
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Heuclin H, Grünstein D, Le Goff XF, Le Floch P, Mézailles N. Phosphorus stabilized carbene complexes: bisphosphonate dianion synthesis, reactivity and DFT studies of O∼C∼O zirconium(iv) complexes. Dalton Trans 2010:492-9. [DOI: 10.1039/b915468j] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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