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Tsymbal AV, Bizzini LD, MacMillan DWC. Nickel Catalysis via S H2 Homolytic Substitution: The Double Decarboxylative Cross-Coupling of Aliphatic Acids. J Am Chem Soc 2022; 144:21278-21286. [PMID: 36375080 PMCID: PMC10680145 DOI: 10.1021/jacs.2c08989] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cross-coupling platforms are traditionally built around a sequence of closed-shell steps, such as oxidative addition, transmetalation, and reductive elimination. Herein, we describe a dual photo/nickel catalytic manifold that performs cross-coupling via a complementary sequence involving free radical generation, radical sorting via selective binding to a Ni(II) center, and bimolecular homolytic substitution (SH2) at a high-valent nickel-alkyl complex. This catalytic manifold enables the hitherto elusive cross-coupling of diverse aliphatic carboxylic acids to generate valuable C(sp3)-C(sp3)-products. Notably, the powerful SH2 mechanism provides general access to sterically encumbered quaternary carbon centers, addressing a long-standing challenge in fragment coupling chemistry.
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Affiliation(s)
- Artem V Tsymbal
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - Lorenzo Delarue Bizzini
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - David W C MacMillan
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
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2
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Kumar P, Devkota L, Casey MC, Fischer AA, Lindeman SV, Fiedler AT. Reversible Dioxygen Binding to Co(II) Complexes with Noninnocent Ligands. Inorg Chem 2022; 61:16664-16677. [PMID: 36206536 PMCID: PMC11218047 DOI: 10.1021/acs.inorgchem.2c02246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of mononuclear Co(II) complexes with noninnocent (redox-active) ligands are prepared that exhibit metal-ligand cooperativity during the reversible binding of O2. The complexes have the general formula, [CoII(LS,N)(TpR2)] (R = Me, Ph), where LS,N is a bidentate o-aminothiophenolate and TpR2 is a hydrotris(pyrazol-1-yl)borate scorpionate with R-substituents at the 3- and 5-positions. Exposure to O2 at room temperature results in one-electron oxidation and deprotonation of LS,N. The oxidized derivatives possess substantial "singlet diradical" character arising from antiferromagnetic coupling between an iminothiosemiquinonate (ITSQ•-) ligand radical and a low-spin Co(II) ion. The [CoII(TpMe2)(X2ITSQ)] complexes, where X = H or tBu, coordinate O2 reversibly at reduced temperatures to provide Co/O2 adducts. The O2 binding reactions closely resemble those previously reported by our group (Kumar et al., J. Am. Chem. Soc. 2019,141, 10984-10987) for the related complexes [CoII(TpMe2)(tBu2SQ)] and [CoII(TpMe2)(tBu2ISQ)], where tBu2(I)SQ represents 4,6-di-tert-butyl-(2-imino)semiquinonate radicals. In each case, the oxygenation reaction proceeds via the addition of O2 to both the cobalt ion and the ligand radical, generating metallocyclic cobalt(III)-alkylperoxo structures. Thermodynamic measurements elucidate the relationship between O2 affinity and redox potentials of the (imino)(thio)semiquinonate radicals, as well as energetic differences between these reactions and conventional metal-based oxygenations. The results highlight the utility and versatility of noninnocent ligands in the design of O2-absorbing compounds.
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Affiliation(s)
- Praveen Kumar
- Department of Chemistry, Marquette University, 1414 W. Clybourn Street, Milwaukee, Wisconsin53233, United States
| | - Laxmi Devkota
- Department of Chemistry, Marquette University, 1414 W. Clybourn Street, Milwaukee, Wisconsin53233, United States
| | - Maximilian C Casey
- Department of Chemistry, Marquette University, 1414 W. Clybourn Street, Milwaukee, Wisconsin53233, United States
| | - Anne A Fischer
- Department of Chemistry, Marquette University, 1414 W. Clybourn Street, Milwaukee, Wisconsin53233, United States
| | - Sergey V Lindeman
- Department of Chemistry, Marquette University, 1414 W. Clybourn Street, Milwaukee, Wisconsin53233, United States
| | - Adam T Fiedler
- Department of Chemistry, Marquette University, 1414 W. Clybourn Street, Milwaukee, Wisconsin53233, United States
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3
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Synthesis, structural characterization, and reactivity of a dinuclear cobalt(II) (μ-hydroxo)(μ-pyrazolato) complex based on a hydrotris(pyrazolyl)borate ligand. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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4
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Nishiura T, Chiba Y, Nakazawa J, Hikichi S. Tuning the O2 Binding Affinity of Cobalt(II) Centers by Changing the Structural and Electronic Properties of the Distal Substituents on Azole-Based Chelating Ligands. Inorg Chem 2018; 57:14218-14229. [DOI: 10.1021/acs.inorgchem.8b02241] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Toshiki Nishiura
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Yosuke Chiba
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Jun Nakazawa
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Shiro Hikichi
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
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5
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Nishiura T, Uramoto T, Takiyama Y, Nakazawa J, Hikichi S. Cobalt(II) Complexes with N, N, N-Scorpionates and Bidentate Ligands: Comparison of Hydrotris(3,5-dimethylpyrazol-1-yl)borate Tp* vs. Phenyltris(4,4-dimethyloxazolin-2-yl)borate To M to Control the Structural Properties and Reactivities of Cobalt Centers. Molecules 2018; 23:E1466. [PMID: 29914171 PMCID: PMC6099786 DOI: 10.3390/molecules23061466] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 06/13/2018] [Accepted: 06/15/2018] [Indexed: 11/16/2022] Open
Abstract
Scorpionate ligands Tp* (hydrotris(3,5-dimethylpyrazol-1-yl)borate) and ToM (tris(4,4-dimethyloxazolin-2-yl)phenylborate) complexes of cobalt(II) with bidentate ligands were synthesized. Both Tp* and ToM coordinate to cobalt(II) in a tridentate fashion when the bidentate ligand is the less hindered acetylacetonate. In crystal structures, the geometry of cobalt(II) supported by the N₃O₂ donor set in the Tp* complex is a square-pyramid, whereas that in the ToM complex is close to a trigonal-bipyramid. Both Tp*- and ToM-acac complexes exhibit solvatochromic behavior, although the changing structural equilibria of these complexes in MeCN are quite different. In the bis(1-methylimidazol-2-yl)methylphenylborate (LPh) complexes, Tp* retains the tridentate (к³) mode, whereas ToM functions as the bidentate (к²) ligand, giving the tetrahedral cobalt(II) complex. The bowl-shaped cavity derived from the six methyl groups on ToM lead to susceptibility to the bulkiness of the opposite bidentate ligand. The entitled scorpionate compounds mediate hydrocarbon oxidation with organic peroxides. Allylic oxidation of cyclohexene occurs mainly on the reaction with tert-butyl hydroperoxide (TBHP), although the catalytic efficiency of the scorpionate ligand complexes is lower than that of Co(OAc)₂ and Co(acac)₂. On cyclohexane oxidation with meta-chloroperbenzoic acid (mCPBA), both ToM and Tp* complexes function as catalysts for hydroxylation. The higher electron-donating ToM complexes show faster initial reaction rates compared to the corresponding Tp* complexes.
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Affiliation(s)
- Toshiki Nishiura
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Takahiro Uramoto
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Yuichiro Takiyama
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Jun Nakazawa
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Shiro Hikichi
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
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6
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Hoof S, Sallmann M, Herwig C, Braun-Cula B, Limberg C. O 2 activation at a trispyrazolylborato nickel(ii) malonato complex. Dalton Trans 2017; 46:16792-16795. [PMID: 29177352 DOI: 10.1039/c7dt04056c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
To support mechanistic inferences made for an iron-based dioxygenase model, a nickel analogue, i.e. a TpNi-malonate (1) was prepared. 1 proved to represent a rare case of a nickel complex reacting with O2 in a controlled manner - mechanistically different from the iron case - and leads to hydroxylation of the malonate.
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Affiliation(s)
- S Hoof
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - M Sallmann
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - C Herwig
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - B Braun-Cula
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - C Limberg
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
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7
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Nakamizu A, Kasai T, Nakazawa J, Hikichi S. Immobilization of a Boron Center-Functionalized Scorpionate Ligand on Mesoporous Silica Supports for Heterogeneous Tp-Based Catalysts. ACS OMEGA 2017; 2:1025-1030. [PMID: 31457483 PMCID: PMC6641073 DOI: 10.1021/acsomega.7b00022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 03/06/2017] [Indexed: 06/10/2023]
Abstract
To develop novel immobilized metallocomplex catalysts, allyltris(3-trifluoromethylpyrazol-1-yl)borate (allyl-TpCF3) was synthesized. A boron-attached allyl group reacts with thiol to afford the desired mesoporous silica-immobilized TpCF3. Cobalt(II) is an efficient probe for estimating the structures of the immobilized metallocomplexes. The structures of the formed cobalt(II) complexes and their catalytic activity depended on the density of the organic thiol groups and on the state of the remaining sulfur donors on the supports.
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8
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Fischer AA, Lindeman SV, Fiedler AT. Spectroscopic and computational studies of reversible O2 binding by a cobalt complex of relevance to cysteine dioxygenase. Dalton Trans 2017; 46:13229-13241. [DOI: 10.1039/c7dt01600j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Spectroscopic and computational studies of reversible O2 binding by a cobalt active-site mimic shed light on the catalytic mechanism of cysteine dioxygenases.
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9
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“Scorpionate-like” complexes that are held together by hydrogen bonds: Crystallographic and spectroscopic studies of (3-NH(t-butyl)-5-methyl-pyrazole) MX2 (M = Zn, Ni, Co, Mn; n= 3, 4; X = Cl, Br). Polyhedron 2016. [DOI: 10.1016/j.poly.2015.10.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Zhang Y, Malik UP, Quiggins B, Nguyen H, Beedle CC, Kovalev AE, Clérac R, Hill S, Bythell BJ, Holmes SM. Structure‐Property Relationships in Tricyanoferrate(III) Building Blocks and Trinuclear Cyanide‐Bridged Complexes. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600199] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yuanzhu Zhang
- Department of Chemistry & BiochemistryUniversity of Missouri St. Louis63121St. LouisMissouriUSA
| | - Uma P. Malik
- Department of Chemistry & BiochemistryUniversity of Missouri St. Louis63121St. LouisMissouriUSA
| | - Benjamin Quiggins
- Department of Chemistry & BiochemistryUniversity of Missouri St. Louis63121St. LouisMissouriUSA
| | - Hung Nguyen
- Department of Chemistry & BiochemistryUniversity of Missouri St. Louis63121St. LouisMissouriUSA
| | | | | | - Rodolphe Clérac
- CRPPCNRS33600PessacFrance
- CRPPUniv. Bordeaux33600PessacFrance
| | - Stephen Hill
- National High Magnetic Field Laboratory32306TallahasseeFloridaUSA
- Department of PhysicsFlorida State University32310TallahasseeFloridaUSA
| | - Benjamin J. Bythell
- Department of Chemistry & BiochemistryUniversity of Missouri St. Louis63121St. LouisMissouriUSA
| | - Stephen M. Holmes
- Department of Chemistry & BiochemistryUniversity of Missouri St. Louis63121St. LouisMissouriUSA
- Center for NanoscienceUniversity of Missouri‐St. Louis63121St. LouisMissouriUSA
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11
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Chakraborty S, Piszel PE, Brennessel WW, Jones WD. A Single Nickel Catalyst for the Acceptorless Dehydrogenation of Alcohols and Hydrogenation of Carbonyl Compounds. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00824] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sumit Chakraborty
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Paige E. Piszel
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William W. Brennessel
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William D. Jones
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
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12
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Denysenko D, Jelic J, Reuter K, Volkmer D. Postsynthetic Metal and Ligand Exchange in MFU-4l: A Screening Approach toward Functional Metal-Organic Frameworks Comprising Single-Site Active Centers. Chemistry 2015; 21:8188-99. [DOI: 10.1002/chem.201406564] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/11/2015] [Indexed: 02/06/2023]
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13
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Hikichi S, Hanaue K, Fujimura T, Okuda H, Nakazawa J, Ohzu Y, Kobayashi C, Akita M. Characterization of nickel(ii)-acylperoxo species relevant to catalytic alkanehydroxylation by nickel complex with mCPBA. Dalton Trans 2013; 42:3346-56. [DOI: 10.1039/c2dt32419a] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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14
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Nakazawa J, Ogiwara H, Kashiwazaki Y, Ishii A, Imamura N, Samejima Y, Hikichi S. Dioxygen activation and substrate oxygenation by a p-nitrothiophenolatonickel complex: unique effects of an acetonitrile solvent and the p-nitro group of the ligand. Inorg Chem 2011; 50:9933-5. [PMID: 21916455 DOI: 10.1021/ic201555f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The nickel(II) complex [Ni(Tp(Me2)) (SC(6)H(4)NO(2))] [1a; Tp(Me2) = hydrotris(3,5-dimethylpyrazol-1-yl)borate] reacts with O(2) to form the ligand oxygenation product ArSO(2)(-) in MeCN, and also 1a catalyzes the oxygenation of external substrates such as triphenylphosphine. The reactivity may correlate to the unique quinoid-like resonance structure of the thiophenolate ligand. The structure is stabilized by a p-nitro group and induced by coordination of MeCN.
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Affiliation(s)
- Jun Nakazawa
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama, 221-8686 Japan
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15
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Hikichi S, Kobayashi C, Yoshizawa M, Akita M. Tuning the Stability and Reactivity of Metal-bound Alkylperoxide by Remote Site Substitution of the Ligand. Chem Asian J 2010; 5:2086-92. [DOI: 10.1002/asia.201000183] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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17
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Harding DJ, Harding P, Kivnang J, Adams H. Cationic tris(pyrazolyl)borate bipyrimidine complexes. TRANSIT METAL CHEM 2010. [DOI: 10.1007/s11243-010-9358-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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19
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Fujita K, Akita M, Hikichi S. Acetoxybis(imidazolyl)methylborate [B(ImN-Me)2(OC(O)Me)Me]−: Carboxylation of borane moiety of imidazolyl-based scorpionate. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Desrochers PJ, Corken AL, Tarkka RM, Besel BM, Mangum EE, Linz TN. A Simple Route to Single-Scorpionate Nickel(II) Complexes with Minimum Steric Requirements. Inorg Chem 2009; 48:3535-41. [DOI: 10.1021/ic8015645] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | - Adam L. Corken
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035
| | - Richard M. Tarkka
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035
| | - Brian M. Besel
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035
| | - Erin E. Mangum
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035
| | - Tiffany N. Linz
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035
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21
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Synthesis and characterization of sterically hindered tris(pyrazolyl)borate Ni complexes. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2007.03.046] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Boyer JL, Yao H, Kuhlman ML, Rauchfuss TB, Wilson S. Cyanometalate Cages with Exchangeable Terminal Ligands. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200700001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Li D, Ruschman C, Parkin S, Clérac R, Holmes SM. Syntheses, structures, and magnetic characterization of dicyanometalate(ii) building blocks: [NEt4][(Tp*)MII(CN)2] [MII= Cr, Co, Ni; Tp* = hydridotris(3,5-dimethylpyrazol-1-yl)borate]. Chem Commun (Camb) 2006:4036-8. [PMID: 17003891 DOI: 10.1039/b608297a] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The syntheses and structures of three dicyanometalate(II) complexes, [NEt(4)][(Tp*)M(II)(CN)(2)].nMeCN.(1/2)Et(2)O (M(II) = Cr, 1, n = (1/2); Co, 2, n = 1; Ni, 3, n = 1) are described; magnetic studies indicate that 3 is diamagnetic while 1 and 2 are paramagnetic high- and low-spin S = 2 and (1/2) complexes, respectively.
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Affiliation(s)
- Dongfeng Li
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055, USA
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Singh UP, Babbar P, Sharma AK. Cobalt complexes bridge with a (μ-X)(μ-carboxylato) unit (X=OH, N3): synthesis and structural studies. Inorganica Chim Acta 2005. [DOI: 10.1016/j.ica.2004.07.052] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Coordinatively unsaturated organometallic system based on Tp ligand: tetrahedral TpRM-R′ and TpRM-M′Ln species. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2004.08.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Kujime M, Hikichi S, Akita M. Interaction of hydroperoxopalladium complexes, (TpR)(py)Pd–OOH, with hydroxo-nickel and -cobalt complexes, [(μ-OH)(MTpR′)]2(M = Ni, Co), leading to oxidative dehydrogenation of the saturated hydrocarbyl moiety in the ancillary ligand (TpiPr2). Dalton Trans 2003. [DOI: 10.1039/b307262m] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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