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Zhao Y, Ma X, Yan B, Ni C, He X, Peng Y, Yang Z. A novel case of atom-efficient C-C bond formation of small molecules catalyzed by the facile organoaluminum compound. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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2
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Kandel R, Schatte G, Jessop PG. Rh(i) and Ru(ii) phosphaamidine and phosphaguanidine (1,3-P,N) complexes and their activity for CO 2 hydrogenation. Dalton Trans 2019; 48:12512-12521. [PMID: 31363732 DOI: 10.1039/c9dt00602h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Phosphaamidine metal complexes Rh2Cl2[Ph2PC(Ph)[double bond, length as m-dash]NPh]2μ-CO (1), RuCl2[Ph2PC(Ph)[double bond, length as m-dash]N(Ph)]2 (2), [Rh{iPr2PC(Ph)[double bond, length as m-dash]NiPr}(COD)]BF4 (3), and RuCl2[iPr2PC(Ph)[double bond, length as m-dash]NiPr](DMSO)2 (4) are prepared by combining phosphaamidines Ph2P-C(Ph)[double bond, length as m-dash]NPh and iPr2P-C(Ph)[double bond, length as m-dash]NiPr (1,3-P,N) with their corresponding metal ions. Complexes 1 and 2 are stable in air while 3 and 4 are stable under inert conditions. For further comparison of structure and stability, a Ru(ii) phosphaguanidine complex, RuCl2[Me2NC(PPh2)[double bond, length as m-dash]NiPr](DMSO)2 (6) was prepared. Complex 6 is stable in air and in the presence of water. The structures of the phosphaamidine and phosphaguanidine complexes, determined using single crystal X-ray diffraction, revealed P,N bidentate coordination. While all five complexes have some activity as precatalysts, complex 6 was the most active.
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Affiliation(s)
- Ramjee Kandel
- Department of Chemistry, Queen's University, Kingston, ON, CanadaK7L 3N6.
| | - Gabriele Schatte
- Department of Chemistry, Queen's University, Kingston, ON, CanadaK7L 3N6.
| | - Philip G Jessop
- Department of Chemistry, Queen's University, Kingston, ON, CanadaK7L 3N6.
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Feng Z, Huang Z, Wang S, Wei Y, Zhou S, Zhu X. Synthesis and characterization of 2-t-butylimino-functionalized indolyl rare-earth metal amido complexes for the catalytic addition of terminal alkynes to carbodiimides: the dimeric complexes with the alkynide species in the μ–η1:η2 bonding modes. Dalton Trans 2019; 48:11094-11102. [DOI: 10.1039/c9dt01582e] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dimeric complexes [(μ–η1:η2-RCC)REL2]2 (L = 2-(tBuNCH)C8H5N), with alkynyl in the μ–η1:η2 modes, were isolated in the study of the catalytic reaction.
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Affiliation(s)
- Zhijun Feng
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Zeming Huang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Shaowu Wang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Yun Wei
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Shuangliu Zhou
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Xiancui Zhu
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
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Keweloh L, Aders N, Hepp A, Pleschka D, Würthwein EU, Uhl W. A P-H functionalized Al/P-based frustrated Lewis pair - hydrophosphination of nitriles, ring opening with cyclopropenones and evidence of P[double bond, length as m-dash]C double bond formation. Dalton Trans 2018; 47:8402-8417. [PMID: 29893387 DOI: 10.1039/c8dt01836g] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Hydroalumination of R-P(H)-C[triple bond, length as m-dash]C-tBu with bulky H-Al[CH(SiMe3)2]2 afforded the new P-H functionalized Al/P-based frustrated Lewis pair R-P(H)-C[[double bond, length as m-dash]C(H)-tBu]-AlR2 [R = CH(SiMe3)2; FLP 7]. A weak adduct of 7 with benzonitrile (8) was detected by NMR spectroscopy, but could not be isolated. tert-Butyl isocyanide afforded a similar, but isolable adduct (9), in which the isocyanide C atom was coordinated to aluminium. The unique reactivity of 7 became evident from its reactions with the heteroatom substituted nitriles PhO-C[triple bond, length as m-dash]N, PhCH2S-C[triple bond, length as m-dash]N and H8C4N-C[triple bond, length as m-dash]N. Hydrophosphination of the C[triple bond, length as m-dash]N triple bonds afforded imines at room temperature which were coordinated to the FLP by Al-N and P-C bonds to yield AlCPCN heterocycles (10 to 12). These processes depend on substrate activation by the FLP. Diphenylcyclopropenone and its sulphur derivative reacted with 7 by addition of the P-H bond to a C-C bond of the strained C3 ring and ring opening to afford the fragment (Z)-Ph-C(H)[double bond, length as m-dash]C(Ph)-C-X-Al (X = O, S). The C-O or C-S groups were coordinated to the FLP to yield AlCPCX heterocycles (13 and 14). The thiocarbonyl derived compound 14 contains an internally stabilized phosphenium cation with a localized P[double bond, length as m-dash]C bond, a trigonal planar coordinated P atom and a short P[double bond, length as m-dash]C distance (168.9 pm). Insight into formation mechanisms, the structural and energetic properties of FLP 7 and compounds 13 and 14 was gained by quantum chemical DFT calculations.
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Affiliation(s)
- Lukas Keweloh
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstraße 30, D-48149 Münster, Germany.
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Sroor FM, Hrib CG, Liebing P, Hilfert L, Busse S, Edelmann FT. Five different types of η8-cyclooctatetraenyl-lanthanide half-sandwich complexes from one ligand set, including a “giant neodymium wheel”. Dalton Trans 2016; 45:13332-46. [DOI: 10.1039/c6dt01974a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using one ligand set, five different types of η8-cyclooctatetraenyl-lanthanide half-sandwich complexes, including a “giant neodymium wheel”, have been prepared and structurally characterized.
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Affiliation(s)
- Farid M. Sroor
- Organometallic and Organometalloid Chemistry Department
- National Research Centre
- 12622 Cairo
- Egypt
| | - Cristian G. Hrib
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- Universitätsplatz 2
- D-39106 Magdeburg
- Germany
| | - Phil Liebing
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- Universitätsplatz 2
- D-39106 Magdeburg
- Germany
| | - Liane Hilfert
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- Universitätsplatz 2
- D-39106 Magdeburg
- Germany
| | - Sabine Busse
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- Universitätsplatz 2
- D-39106 Magdeburg
- Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- Universitätsplatz 2
- D-39106 Magdeburg
- Germany
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7
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8
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Sroor FM, Hrib CG, Hilfert L, Edelmann FT. Synthesis and Structural Characterization of an Unusual Heterometallic Europium(III) Amidinate Complex. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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9
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Lanthanide(III)-bis(cyclopropylethinylamidinates): Synthesis, structure, and catalytic activity. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.01.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Sroor FM, Hrib CG, Hilfert L, Busse S, Edelmann FT. Synthesis and catalytic activity of homoleptic lanthanide-tris(cyclopropylethinyl)amidinates. NEW J CHEM 2015. [DOI: 10.1039/c5nj00555h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New unsolvated, homoleptic lanthanide(iii) tris(cyclopropylethinylamidinate) complexes of the type [c-C3H5–CC–C(NR)2]3Ln (R = iPr, cyclohexyl; Ln = Nd, Sm, Ho) have been prepared and the crystal structure of the holmium derivative [c-C3H5–CC–C(NiPr)2]3Ho has been confirmed by X-ray diffraction.
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Affiliation(s)
- Farid M. Sroor
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Cristian G. Hrib
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Liane Hilfert
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Sabine Busse
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
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Ma W, Xu L, Zhang WX, Xi Z. Half-sandwich rare-earth metal tris(alkyl) ate complexes catalyzed phosphaguanylation reaction of phosphines with carbodiimides: an efficient synthesis of phosphaguanidines. NEW J CHEM 2015. [DOI: 10.1039/c5nj01136a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Half-sandwich Y/Li ate complex displays better catalytic activity for phosphaguanylation reaction of phosphines with carbodiimides than the neutral yttrium complexes.
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Affiliation(s)
- Wangyang Ma
- Beijing National Laboratory for Molecular Sciences
- MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering
- College of Chemistry
- Peking University
- Beijing 100871
| | - Ling Xu
- Beijing National Laboratory for Molecular Sciences
- MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering
- College of Chemistry
- Peking University
- Beijing 100871
| | - Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences
- MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering
- College of Chemistry
- Peking University
- Beijing 100871
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences
- MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering
- College of Chemistry
- Peking University
- Beijing 100871
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13
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Grirrane A, Garcia H, Alvarez E. Isolation and X-ray characterization of palladium-N complexes in the guanylation of aromatic amines. Mechanistic implications. Beilstein J Org Chem 2013; 9:1455-62. [PMID: 23946843 PMCID: PMC3740567 DOI: 10.3762/bjoc.9.165] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Accepted: 06/21/2013] [Indexed: 01/26/2023] Open
Abstract
In the context of palladium-catalyzed guanylation of anilines herein, we have been able to characterize and isolate bis(anilino) and bis(guanidino)Pd(II) complexes using reaction conditions under which stoichiometric amounts of palladium salts are used. Characterization of these palladium complexes strongly supports a mechanistic proposal for the catalytic guanylation of anilines using PdCl2(NCCH3)2 as catalyst that involves the intermediacy of these Pd(II) complexes.
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Affiliation(s)
- Abdessamad Grirrane
- Instituto Universitario de Tecnología Química CSIC-UPV, Universidad Politécnica de Valencia, Av. De los Naranjos s/n, 46022 Valencia, Spain
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Cai LX, Yao YM, Xue MQ, Zhang Y, Shen Q. β-Diketiminatoytterbium aryloxides: synthesis, structural characterization, and catalytic activity for addition of amines to carbodiimides. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.2996] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ling-xia Cai
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Ying-ming Yao
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Ming-qiang Xue
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Yong Zhang
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Qi Shen
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
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Tu J, Li W, Xue M, Zhang Y, Shen Q. Bridged bis(amidinate) lanthanide aryloxides: syntheses, structures, and catalytic activity for addition of amines to carbodiimides. Dalton Trans 2013; 42:5890-901. [DOI: 10.1039/c3dt33069a] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Edelmann FT. Recent Progress in the Chemistry of Metal Amidinates and Guanidinates. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2013. [DOI: 10.1016/b978-0-12-407692-1.00002-3] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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17
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Behrle AC, Schmidt JAR. Insertion Reactions and Catalytic Hydrophosphination of Heterocumulenes using α-Metalated N,N-Dimethylbenzylamine Rare-Earth-Metal Complexes. Organometallics 2012. [DOI: 10.1021/om300807k] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Andrew C. Behrle
- Department of Chemistry, School of Green Chemistry
and Engineering, College of Natural Sciences and Mathematics, The University of Toledo, 2801 W. Bancroft Street,
MS 602, Toledo, Ohio 43606-3390, United States
| | - Joseph A. R. Schmidt
- Department of Chemistry, School of Green Chemistry
and Engineering, College of Natural Sciences and Mathematics, The University of Toledo, 2801 W. Bancroft Street,
MS 602, Toledo, Ohio 43606-3390, United States
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Grirrane A, Garcia H, Corma A, Álvarez E. Orthogonal CN Plus CC Tandem Reaction of Iodoanilines Leading to Styrylguanidines Catalyzed by Supported Palladium Nanoparticles. Chemistry 2012; 18:14934-8. [DOI: 10.1002/chem.201202823] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Indexed: 01/24/2023]
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19
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Synthesis, Structure, and Reactivity of RuIIComplexes with Trimethylsilylethinylamidinate Ligands. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201100431] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Li D, Guang J, Zhang WX, Wang Y, Xi Z. Zn(OTf)2-catalyzed addition of amines to carbodiimides: efficient synthesis of guanidines and unpredicted formation of Zn–N amido species. Org Biomol Chem 2010; 8:1816-20. [DOI: 10.1039/b923249b] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Adediran SA, Day TP, Sil D, Kimbrell MR, Warshakoon HJ, Malladi SS, David SA. Synthesis of a highly water-soluble derivative of amphotericin B with attenuated proinflammatory activity. Mol Pharm 2009; 6:1582-90. [PMID: 19663403 PMCID: PMC3709255 DOI: 10.1021/mp9001602] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Amphotericin B (AmB), a well-known polyene antifungal agent, displays a marked tendency to self-associate and, as a consequence, exhibits very poor solubility in water. The therapeutic index of AmB is low and is associated with significant dose-related nephrotoxicity, as well as acute, infusion-related febrile reactions. Reports in the literature indicate that the toxicity of AmB may be related to the physical state of the drug. Reaction of AmB in dimethylformamide with bis(dimethylaminopropyl)carbodiimide yielded an unexpected N-alkylguanidine/N-acylurea bis-adduct of AmB which was highly water-soluble. The absorption spectrum of the AmB derivative in water indicated excellent monomerization, and the antifungal activities of reference AmB and its water-soluble derivative against Candida albicans were found to be virtually identical. Furthermore, the water-soluble adduct is significantly less active in engaging TLR4, which would suggest that the adduct may be less proinflammatory.
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Affiliation(s)
| | | | - Diptesh Sil
- Department of Medicinal Chemistry, University of Kansas
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Rowley CN, Woo TK. Computational design of ruthenium hydride olefin-hydrogenation catalysts containing hemilabile ligands,. CAN J CHEM 2009. [DOI: 10.1139/v09-077] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Three ruthenium hydridocarbonyl complexes containing bidentate hemilabile ligands have been evaluated as possible catalysts for the H2 hydrogenation of olefins. Our previous investigations of the mainstay hydridoruthenium catalyst, RuHCl(CO)(PR3)2 (1), indicated that the rate-limiting olefin-insertion barrier was increased by the need for an H2 molecule to act as a stabilizing two-electron donor. Using density functional theory (DFT) calculations, we have determined that a P,N phosphane-oxazoline would be suitable for stabilizing the metal center of the complex RuHCl(CO)(PiPr3)(DZ), where DZ is a neutral bidentate hemilable ligand. In the reaction catalyzed by this complex, the olefin insertion occurs before the coordination of H2, avoiding the entropic penalty of coordinating H2. We predict that the phosphane-oxazoline containing catalyst will have higher activity than 1 and a different rate-law, zero-order in [H2]. The oxazoline increases the strength of coordination of the ethylene due to stronger back-donation from destabilized Ru d-orbitals to the ethylene π* molecular orbital.
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Affiliation(s)
- Christopher N. Rowley
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Tom K. Woo
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, Ottawa, ON K1N 6N5, Canada
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Zhang WX, Li D, Wang Z, Xi Z. Alkyl Aluminum-Catalyzed Addition of Amines to Carbodiimides: A Highly Efficient Route to Substituted Guanidines. Organometallics 2009. [DOI: 10.1021/om801035t] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, People’s Republic of China, and State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, People’s Republic of China
| | - Dongzhen Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, People’s Republic of China, and State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, People’s Republic of China
| | - Zitao Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, People’s Republic of China, and State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, People’s Republic of China
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences (BNLMS), and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, People’s Republic of China, and State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, People’s Republic of China
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