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Nuricumbo-Escobar JJ, Campos-Alvarado C, Ríos-Moreno G, Morales-Morales D, Walsh PJ, Parra-Hake M. Binuclear palladium(I) and palladium(II) complexes of ortho-functionalized 1,3-bis(aryl)triazenido ligands. Inorg Chem 2007; 46:6182-9. [PMID: 17580936 PMCID: PMC2543110 DOI: 10.1021/ic700516p] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Three new bis(aryl)triazene ligands, Ar-NNNH-Ar' [Ar = o-C(6)H(4)-CO(2)Me, Ar' = p-C(6)H(4)-CH(3) (2); Ar = Ar' = o-C(6)H(4)-CO(2)Me (3); Ar = o-C(6)H(4)-SMe, Ar' = p-C(6)H(4)-CH(3)) (4)], have been synthesized. The reaction of 1-4 with PdCl(2)(NCCH(3))(2) in the presence of a base afforded a series of binuclear diamagnetic palladium complexes. In these reactions, ligands 1-3 afforded the palladium(I) complexes [Pd(I)(o-MeO(2)C-C(6)H(4)-NNN-o-C(6)H(4)-CO(2)Me)](2) (5, monoclinic, space group P21/c, a = 8.6070(10) Angstrom, b = 14.3220(10) Angstrom, c = 12.7310(10) Angstrom, beta = 100.2950(10) degrees, Z = 2), [Pd(I)(o-MeO-C(6)H(4)-NNN-o-C(6)H(4)-OMe)](2) (6, triclinic, space group P, a = 6.6288(5) Angstrom, b = 10.2631(10) Angstrom, c = 11.0246(11) Angstrom, alpha = 85.579(6) degrees, beta = 80.885(6) degrees, gamma = 74.607(6) degrees, Z = 1), and [Pd(I)(o-MeO(2)C-C(6)H(4)-NNN-p-C(6)H(4)-CH(3))](2) (7, tetragonal, space group I41/a, a = 20.866(3) Angstrom, b = 20.866(3) Angstrom, c = 13.156(2) Angstrom, Z = 8). In contrast, the reaction of ligand 4 with PdCl(2)(NCCH(3))(2) resulted in the formation of a palladium(II) dimer, [Pd(II)(o-MeS-C(6)H(4)-NNN-p-C(6)H(4)-CH(3))Cl](2) (8, orthorhombic, space group P2(1)2(1)2, a = 10.4058(5) Angstrom, b = 16.2488(8) Angstrom, c = 9.9500(5) Angstrom, Z = 2).
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Affiliation(s)
- Juan José Nuricumbo-Escobar
- Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana, Apartado Postal 1166, 22000 Tijuana, B. C. México
| | - Carlos Campos-Alvarado
- Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana, Apartado Postal 1166, 22000 Tijuana, B. C. México
| | - Gustavo Ríos-Moreno
- Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana, Apartado Postal 1166, 22000 Tijuana, B. C. México
| | - David Morales-Morales
- Instituto de Química, Universidad Nacional Autónomada México, Circuito Exterior Cd. UniversitariaCoyoacan. C.P. 04510 Mexico, D.F
| | - Patrick J. Walsh
- Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34 Street, Philadelphia, PA 19104-6323, USA
- Corresponding authors: Tel. +1-215-573-2875; fax +1-215-573-6743; E-mail: (P. J. Walsh). Tel. +52-664-623-4043; Fax: +52-664-6233772. E-mail: (M. Parra-Hake)
| | - Miguel Parra-Hake
- Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana, Apartado Postal 1166, 22000 Tijuana, B. C. México
- Corresponding authors: Tel. +1-215-573-2875; fax +1-215-573-6743; E-mail: (P. J. Walsh). Tel. +52-664-623-4043; Fax: +52-664-6233772. E-mail: (M. Parra-Hake)
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Pascu SI, Anderson GD, Green ML, Green JC, Rees NH, Cowley AR. Synthesis and structural investigations of bulky imino- and amido-phosphine palladium dimers. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2005.12.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Electrochemical reduction properties of A-frame compounds and crystal structure of Pd2(dppm)2(Me)2(Br)+ dimer. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2005.09.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Chang X, Lee KE, Jeon SI, Kim YJ, Lee HK, Lee SW. Bis(isothiocyanato)bis(phosphine) complexes of group 10 metals: reactivity toward organic isocyanides. Dalton Trans 2005:3722-31. [PMID: 16471052 DOI: 10.1039/b508134c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Treatment of Ni(NCS)2(PMe2Ph)2 with organic isocyanides CN-R gave five-coordinate isocyanide Ni(II) complexes, Ni(CN-R)(NCS)2(PMe2Ph)2 (R = C6H3-2,6-Me2 (1), t-Bu (2)). Interestingly, the corresponding reaction of Ni(NCS)2(P(n-Pr)3)2 with 2 equiv. of CN-t-Bu gave an unusual compound, which exists as an ion pair of the trigonal bipyramidal cation [Ni(P(n-Pr)3)2(CN-t-Bu)3]2+ (3) and the dinuclear NCS-bridged anion [Ni(1,3-micro-NCS)(NCS)3]2(2-) (4). In contrast, Pd(NCS)2(P(n-Pr)3)2 underwent substitution with 2 equiv. of CN-t-Bu to give the four-coordinate mono(isocyanide) Pd(II) complex Pd(NCS)(SCN)(CN-t-Bu)(P(n-Pr)3) (5) via phosphine dissociation. Reactions of M(NCS)2L2 (M = Pd, Pt; L = PMe3, PEt3, PMePh2, P(n-Pr)3) with two equiv. of CN-R (R = t-Bu, i-Pr, C6H3-2,6-Me2) gave the corresponding bis(isocyanide) complexes [M(CN-R)2(PR3)2](SCN)2 (7-13), except for Pd(NCS)2(PEt3)2 that reacted with CN-R' (R' = i-Pr, C6H3-2,6-Me2) and produced the mono(isocyanide) Pd(II) complexes [Pd(CN-R')(SCN)(PEt3)2](SCN) (14 and 15). Finally, treatment of M(NCS)2(PMe3)2 (M = Ni, Pd, Pt) with sterically bulky isocyanide CN-C6H3-2,6-i-Pr2 gave various products, (16-18) depending on the identity of the metal.
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Affiliation(s)
- Xiaohong Chang
- Department of Chemistry, Kangnung National University, Korea
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Evrard D, Groison K, Mugnier Y, Harvey PD. The Pd4(dppm)4(H)22+ Cluster: A Precatalyst for the Homogeneous Hydrogenation of Alkynes. Inorg Chem 2003; 43:790-6. [PMID: 14731043 DOI: 10.1021/ic0347992] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The catalytic properties of the title cluster toward the homogeneous hydrogenation of phenylacetylene, diphenylethyne and phenyl-1-propyne have been investigated as a function of temperature, pressure, solvents, substrate and cluster concentrations, and counterions. The title cluster is a precatalyst that exhibits a good catalytic activity under mild conditions (1 atm of H(2) at 20 degrees C) for the hydrogenation of alkynes and alkenes. For the alkyne substrates, the turnover frequencies (tof's) range between 200 and 500 h(-)(1), and the product distribution varies as: cis-products, 75-90%; trans-products; 0-8% after 3 h of reaction. Based on the graphs -d[substrate]/dt vs [Pd(4)](1/2), the mechanism indicates a cluster dissociation into two dimers (presumably of the type Pd(2)(dppm)(2)(H)(solvent)(+)). The variations of tof (or -d[substrate]/dt) as a function of [substrate] and pressure of H(2) are linear. At 1600 psi of H(2), the tof can reach 2500-3000 h(-)(1) (in THF). The tof also increases with temperature reaching a maximum at approximately 35 degrees C (tof: 1000-1300 h(-)(1)), but at higher temperatures cluster decomposition begins to occur, leading to a rapid decrease in rates of catalysis. At 50 degrees C, no catalysis is observed. The hydrogenation reaction can be stopped at the corresponding cis-alkenes with approximately 95% yields, depending on the substrate and experimental conditions used. The tof's also vary with the solvent, where stronger coordinating solvent molecules give higher tof's. In addition, the tof's do not change with the nature of the counterion, which acts as "spectator" in the catalysis.
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Affiliation(s)
- David Evrard
- Contribution from the Laboratoire de Synthèse et d'Electrosynthèse Organométalliques, (LSEO-CNRS UMR 2595), Faculté des Sciences Gabriel, Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
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Besenyei G, Párkányi L, Gács-Baitz E, James BR. Crystallographic characterization of the palladium(I) dimers, syn-Pd2Cl2(dppmMe)2 and Pd2Cl2(dppm)2; solution conformational behavior of syn- and anti-Pd2Cl2(dppmMe)2 and their (μ-Se) adducts [dppmMe=μ-1,1-bis(diphenylphosphino)ethane, and dppm=μ-bis(diphenylphosphino)methane]. Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(01)00682-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Stockland, RA, Janka M, Hoel GR, Rath NP, Anderson GK. General Route to Halide-Bridged Organopalladium A-Frame Complexes and Studies of Reductive Elimination from These Bimetallic Systems. Organometallics 2001. [DOI: 10.1021/om010626d] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert A. Stockland,
- Department of Chemistry and Biochemistry, University of Missouri−St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121
| | - Mesfin Janka
- Department of Chemistry and Biochemistry, University of Missouri−St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121
| | - Gretchen R. Hoel
- Department of Chemistry and Biochemistry, University of Missouri−St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121
| | - Nigam P. Rath
- Department of Chemistry and Biochemistry, University of Missouri−St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121
| | - Gordon K. Anderson
- Department of Chemistry and Biochemistry, University of Missouri−St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121
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Stockland RA, Anderson GK, Rath NP. Synthesis and structures of hydride-bridged palladium A-frame complexes. Inorganica Chim Acta 2000. [DOI: 10.1016/s0020-1693(99)00606-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Maekawa M, Munakata M, Kuroda-Sowa T, Suenaga Y. Synthesis and crystal structure of dinuclear palladium(I) dppm complex with 4-mercaptopyridine in the thione mode. [Pd2(μ-dppm)2(HpyS)2](ClO4)2·CH3OH. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(98)00155-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Maekawa M, Munakata M, Kuroda-Sowa T, Suenaga Y. Synthesis and crystal structure of dinuclear and tetranuclear palladium dppm complexes. [Pd2(μ-dppm)2(vpy)Cl] and [Pd4(μ-dppm)4 (μ-X)2](ClO4)2 (X = Cl, Br and I). Polyhedron 1998. [DOI: 10.1016/s0277-5387(98)00163-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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MAEKAWA M, MUNAKATA M, KURODA-SOWA T, SUENAGA Y. Crystal Structure of Bis(diphenylphosphino)methane Dipalladium(I) Nitrate Complex, (Pd2(.MU.-dppm)2(NO3)2). ANAL SCI 1998. [DOI: 10.2116/analsci.14.447] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Scott Browning C, Farrar DH, Frankel DC, Vittal JJ. Synthesis, characterization and reactivity of binuclear palladium(I)bis(diphenylphosphino)amine complexes. Inorganica Chim Acta 1997. [DOI: 10.1016/s0020-1693(96)05185-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mashima K, Tanaka M, Tani K, Nakano H, Nakamura A. Dinuclear Pd(I)−Pd(I) and Pt(II)···Pt(II) Complexes Supported by Tridentate Pyphos Ligands (Pyphos = 6-(Diphenylphosphino)-2-pyridonate). Inorg Chem 1996. [DOI: 10.1021/ic951658u] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Uson R, Fornies J, Navarro R, Tomas M, Fortuño C, Cebollada J, Welch A. Synthesis and reactivity of palladium(I) derivatives with bis(diphenylphosphino)amine. X-ray crystal structure of Pd2(μ-dppa)2Cl2·(CH3)2CO. Polyhedron 1989. [DOI: 10.1016/s0277-5387(00)81118-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Usóan R, Forniéas J. Organopalladium and Platinum Compounds with Pentahalophenyl Ligands. ADVANCES IN ORGANOMETALLIC CHEMISTRY 1988. [DOI: 10.1016/s0065-3055(08)60115-x] [Citation(s) in RCA: 117] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Uson R, Fornies J, Martinez F, Navarro R, Frias M. Synthesis and reactivity of mixed pentafluorophenyl platinum(I)-palladium(I) derivatives. Inorganica Chim Acta 1987. [DOI: 10.1016/s0020-1693(00)81745-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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