1
|
Fujisawa K, Kataoka T, Terashima K, Kurihara H, de Santis Gonçalves F, Lehnert N. Coordinatively Unsaturated Nickel Nitroxyl Complex: Structure, Physicochemical Properties, and Reactivity toward Dioxygen. Molecules 2023; 28:6206. [PMID: 37687034 PMCID: PMC10489029 DOI: 10.3390/molecules28176206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/17/2023] [Accepted: 08/21/2023] [Indexed: 09/10/2023] Open
Abstract
For its important roles in biology, nitrogen monoxide (·NO) has become one of the most studied and fascinating molecules in chemistry. ·NO itself acts as a "noninnocent" or "redox active" ligand to transition metal ions to give metal-NO (M-NO) complexes. Because of this uncertainty due to redox chemistry, the real description of the electronic structure of the M-NO unit requires extensive spectroscopic and theoretical studies. We previously reported the Ni-NO complex with a hindered N3 type ligand [Ni(NO)(L3)] (L3- denotes hydrotris(3-tertiary butyl-5-isopropyl-1-pyrazolyl)borate anion), which contains a high-spin (hs) nickel(II) center and a coordinated 3NO-. This complex is very stable toward dioxygen due to steric protection of the nickel(II) center. Here, we report the dioxygen reactivity of a new Ni-NO complex, [Ni(NO)(I)(L1″)], with a less hindered N2 type bis(pyrazolyl)methane ligand, which creates a coordinatively unsaturated ligand environment about the nickel center. Here, L1″ denotes bis(3,5-diisopropyl-1-pyrazolyl)methane. This complex is also described as a hs-nickel(II) center with a bound 3NO-, based on spectroscopic and theoretical studies. Unexpectedly, the reaction of [Ni(NO)(I)(L1″)] with O2 yielded [Ni(κ2-O2N)(L1″)2](I3), with the oxidation of both 3NO- and the I- ion to yield NO2- and I3-. Both complexes were characterized by X-ray crystallography, IR, and UV-Vis spectroscopy and theoretical calculations.
Collapse
Affiliation(s)
- Kiyoshi Fujisawa
- Department of Chemistry, Ibaraki University, Mito 310-8512, Ibaraki, Japan
| | - Taisei Kataoka
- Department of Chemistry, Ibaraki University, Mito 310-8512, Ibaraki, Japan
| | - Kohei Terashima
- Department of Chemistry, Ibaraki University, Mito 310-8512, Ibaraki, Japan
| | - Haruka Kurihara
- Department of Chemistry, Ibaraki University, Mito 310-8512, Ibaraki, Japan
| | - Felipe de Santis Gonçalves
- Department of Chemistry and Department of Biophysics, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109, USA;
| | - Nicolai Lehnert
- Department of Chemistry and Department of Biophysics, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109, USA;
| |
Collapse
|
2
|
Naskar T, Jana M, Majumdar A. Binuclear manganese(II)-thiolate complexes: Synthesis, characterization and nitrite induced structural changes. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
3
|
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]
|
4
|
Structures and Properties of Dinitrosyl Iron and Cobalt Complexes Ligated by Bis(3,5-diisopropyl-1-pyrazolyl)methane. INORGANICS 2019. [DOI: 10.3390/inorganics7100116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Two dinitrosyl iron and cobalt complexes [Fe(NO)2(L1”)](BF4) and [Co(NO)2(L1”)](BF4) are synthesized and characterized, supported by a less hindered bidentate nitrogen ligand bis(3,5-diisopropyl-1-pyrazolyl)methane (denoted as L1”), are surprisingly stable under argon atmosphere. X-ray structural analysis shows a distorted tetrahedral geometry. Spectroscopic and structural parameters of the dinitrosyl iron and cobalt complexes are consistent with the previous reported {Fe(NO)2}9 and {Co(NO)2}10. Two N–O and M–N(O) stretching frequencies and their magnetic properties are also consistent with the above electronic structural assignments. We explored the dioxygen reactivities of the obtained dinitrosyl complexes. Moreover, the related [FeCl2(L1”)], [Co(NO3)2(L1”)], and [Co(NO2)2(L1”)] complexes are also characterized in detail.
Collapse
|
5
|
Fujisawa K, Soma S, Kurihara H, Ohta A, Dong HT, Minakawa Y, Zhao J, Alp EE, Hu MY, Lehnert N. Stable Ferrous Mononitroxyl {FeNO}8 Complex with a Hindered Hydrotris(pyrazolyl)borate Coligand: Structure, Spectroscopic Characterization, and Reactivity Toward NO and O2. Inorg Chem 2019; 58:4059-4062. [DOI: 10.1021/acs.inorgchem.9b00107] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Kiyoshi Fujisawa
- Department of Chemistry, Ibaraki University, Mito 310-8512, Japan
| | - Shoko Soma
- Department of Chemistry, Ibaraki University, Mito 310-8512, Japan
| | - Haruka Kurihara
- Department of Chemistry, Ibaraki University, Mito 310-8512, Japan
| | - Ayuri Ohta
- Department of Chemistry, Ibaraki University, Mito 310-8512, Japan
| | - Hai T. Dong
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Yurika Minakawa
- Department of Chemistry, Ibaraki University, Mito 310-8512, Japan
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - E. Ercan Alp
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Michael Y. Hu
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Nicolai Lehnert
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109, United States
| |
Collapse
|
6
|
A monomeric manganese(II) catecholato complex: Synthesis, crystal structure, and reactivity toward molecular oxygen. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.09.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
7
|
Schlapp‐Hackl I, Hassenrück C, Wurst K, Kopacka H, Müller T, Winter RF, Bildstein B. Metallo‐Scorpionates: First Generation of Trimetallic, Homoleptic [Ru]–M–[Ru] Complexes (M = Fe, Co, Ni, Cu). Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800774] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Inge Schlapp‐Hackl
- Institute of General Inorganic and Theoretical Chemistry University of Innsbruck Innrain 80‐82 6020 Innsbruck Austria
| | - Christopher Hassenrück
- Department of Chemistry University of Konstanz Universitätsstrasse 10 784557 Konstanz Germany
| | - Klaus Wurst
- Institute of General Inorganic and Theoretical Chemistry University of Innsbruck Innrain 80‐82 6020 Innsbruck Austria
| | - Holger Kopacka
- Institute of General Inorganic and Theoretical Chemistry University of Innsbruck Innrain 80‐82 6020 Innsbruck Austria
| | - Thomas Müller
- Institute of Organic Chemistry University of Innsbruck Center for Chemistry and Biomedicine Innrain 80‐82 6020 Innsbruck Austria
| | - Rainer F. Winter
- Department of Chemistry University of Konstanz Universitätsstrasse 10 784557 Konstanz Germany
| | - Benno Bildstein
- Institute of General Inorganic and Theoretical Chemistry University of Innsbruck Innrain 80‐82 6020 Innsbruck Austria
| |
Collapse
|
8
|
A personal perspective on the discovery of dioxygen adducts of copper and iron by Nobumasa Kitajima. J Biol Inorg Chem 2017; 22:237-251. [DOI: 10.1007/s00775-016-1432-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Accepted: 12/15/2016] [Indexed: 11/26/2022]
|
9
|
Fujisawa K, Soma S, Kurihara H, Dong HT, Bilodeau M, Lehnert N. A cobalt–nitrosyl complex with a hindered hydrotris(pyrazolyl)borate coligand: detailed electronic structure, and reactivity towards dioxygen. Dalton Trans 2017; 46:13273-13289. [DOI: 10.1039/c7dt01565h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The cobalt–nitrosyl complex [Co(NO)(L3)] is supported by a highly hindered tridentate nitrogen ligand, hydrotris(3-tertiary butyl-5-isopropyl-1-pyrazolyl)borate (denoted as L3−), and shows a linear Co–N–O unit.
Collapse
Affiliation(s)
| | - Shoko Soma
- Department of Chemistry
- Ibaraki University
- Mito 310-8512
- Japan
| | | | - Hai T. Dong
- Department of Chemistry and Department of Biophysics
- University of Michigan
- Ann Arbor
- USA
| | - Max Bilodeau
- Department of Chemistry and Department of Biophysics
- University of Michigan
- Ann Arbor
- USA
| | - Nicolai Lehnert
- Department of Chemistry and Department of Biophysics
- University of Michigan
- Ann Arbor
- USA
| |
Collapse
|
10
|
Soma S, Van Stappen C, Kiss M, Szilagyi RK, Lehnert N, Fujisawa K. Distorted tetrahedral nickel-nitrosyl complexes: spectroscopic characterization and electronic structure. J Biol Inorg Chem 2016; 21:757-75. [DOI: 10.1007/s00775-016-1366-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 06/01/2016] [Indexed: 10/21/2022]
|
11
|
Walker TL, Mula S, Malasi W, Engle JT, Ziegler CJ, van der Est A, Modarelli J, Taschner MJ. Blue copper protein analogue: synthesis and characterization of copper complexes of the N2S2 macrocycle 1,8-dithia-4,11-diazacyclotetradecane. Dalton Trans 2015; 44:20200-6. [PMID: 26536355 DOI: 10.1039/c5dt03389f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To improve understanding of copper at the active site of Type 1 copper proteins, Cu(I) and Cu(II) complexes of 1,8-dithia-4,11-diazacyclotetradecane, shown in , have been successfully isolated and structurally characterized by X-ray crystallography. In these compounds, both Cu(I) and Cu(II) are centered in the plane of the macrocycle containing two sulphur and two nitrogen heteroatoms comprising the distorted tetrahedral/square planar coordination geometry. The UV/VIS spectra, electrochemistry and EPR properties have been obtained for the Cu(II) complex 2. Three absorption bands at 295 nm, 354 nm, and 545 nm are observed in aqueous solution at a pH of 5. These bands have been assigned to the N → Cu(II) and S → Cu(II) charge transfer bands and the d-d transitions respectively. The Cu(I/II) redox midpoint potential of complex 2 in CH3CN is +403 mV versus NHE.
Collapse
Affiliation(s)
- Tia L Walker
- Department of Chemistry, Indiana University Northwest, Gary, IN 46408, USA.
| | - Sam Mula
- Department of Chemistry, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Wilhelm Malasi
- Department of Chemistry, The University of Akron, Akron, OH 44335, USA
| | - James T Engle
- Department of Chemistry, The University of Akron, Akron, OH 44335, USA
| | | | - Art van der Est
- Department of Chemistry, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Jody Modarelli
- Department of Chemistry, Hiram College, Hiram, OH 44234, USA
| | | |
Collapse
|
12
|
Shaban SY, Ramadan AEMM, Ibrahim MM, Mohamed MA, van Eldik R. Spectroscopic, thermodynamic, kinetic studies and oxidase/antioxidant biomimetic catalytic activities of tris(3,5-dimethylpyrazolyl)borate Cu(II) complexes. Dalton Trans 2015; 44:14110-21. [PMID: 26172408 DOI: 10.1039/c5dt01817j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of copper(ii) complexes, viz. [Tp(MeMe)Cu(Cl)(H2O)] (), [Tp(MeMe)Cu(OAc)(H2O)] (), [Tp(MeMe)Cu(NO3)] () and [Tp(MeMe)Cu(ClO4)] () containing tris(3,5-dimethylpyrazolyl)borate (KTp(MeMe)), have been synthesized and fully characterized. The substitution reaction of with thiourea was studied under pseudo-first-order conditions as a function of concentration, temperature and pressure in methanol and acetonitrile as solvents. Two reaction steps that both depended on the nucleophile concentration were observed for both solvents. Substitution of coordinated methanol is about 40 times faster than the substitution of chloride. In acetonitrile, the rate constant for the displacement of coordinated acetonitrile was more than 20 times faster than the substitution of chloride. The reported activation parameters indicate that both reaction steps follow a dissociative mechanism in both solvents. On going from methanol to acetonitrile, the rate constant for the displacement of the solvent becomes more than 200 times faster due to the more labile acetonitrile, but the substitution mechanism remained to have a dissociative character. The antioxidant activities of were evaluated for superoxide dismutase (SOD), glutathione-s-transferase (GST0 and glutathione reduced (GSH-Rd) activity. and were found to show (p < 0.05) the highest antioxidant activity in comparison to and , which can be ascribed to the geometric configuration as well as the nature of the co-ligand. showed catechol oxidase activity with turnover numbers of 20 min(-1) and a coordination affinity for 3,5-DTBC of K1, = 31 mM(-1). K1 is rather large and seems to be typical for faster biomimetic models, and also for the enzyme itself (25 mM(-1)). The reaction rate depended linearly on the complex concentration, indicating a first-order dependence on the catalyst concentration.
Collapse
Affiliation(s)
- Shaban Y Shaban
- Department of Chemistry, Faculty of Science, Kafrelsheikh University, Egypt.
| | | | | | | | | |
Collapse
|
13
|
López-Banet L, Santana MD, García G, Pérez J, García L, Lezama L, da Silva I. Blocking and bridging ligands direct the structure and magnetic properties of dimers of pentacoordinate nickel(II). Dalton Trans 2015; 44:6839-47. [PMID: 25765477 DOI: 10.1039/c5dt00181a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dinuclear pentacoordinate nickel(ii) complexes of the formula [(NiTp*)2(μ-L)] (Tp* = hydrotris(3,5-dimethylpyrazolyl)borate; L = oxalate (); oxamate (); oxamidate (); OC(4-Cl-C6H4N)C(4-Cl-C6H4N)O ()) and {[Ni(N3-mc)]2(μ-L)}(PF6)2 (N3-mc = 2,4,4-trimethyl-1,5,9-triazacyclododec-1-ene; L = oxalate (); oxamate ()) have been synthesized and spectroscopically characterized (IR, (1)H NMR). X-ray structures of show nickel(ii) in a square pyramidal geometry and different supramolecular interactions. Magnetic measurements for show strong antiferromagnetic interactions across the bridging ligand [: J = -36.8 cm(-1), g = 2.16; : J = -43.6 cm(-1), g = 2.12; : J = -51.1 cm(-1), g = 2.12; : J = -39.7 cm(-1), g = 2.18; : J = -35.4 cm(-1), g = 2.20; : J = -44.3 cm(-1), g = 2.18]. Magneto-structural correlations between the magnitude of the magnetic coupling and the different blocking ligands, the different bridging ligands, the distortion of the coordination environment of Ni(ii) and the planarity between the bridging ligand and the basal plane of the Ni(ii) environment have been established for all complexes.
Collapse
Affiliation(s)
- Luisa López-Banet
- Departamento de Química Inorgánica and Regional Campus of International Excellence (Campus Mare Nostrum), Universidad de Murcia, E-30071 Murcia, Spain.
| | | | | | | | | | | | | |
Collapse
|
14
|
Caruso F, Rossi M, Caruso A. Correlation between DFT calculated and X-ray structures from CSD, for Cu(II) and Cu(I) coordination spheres when coordinated to four acyclic amine ligands. A reconsideration of copper(II) planarity. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.964222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
| | - Miriam Rossi
- Department of Chemistry, Vassar College, Poughkeepsie, NY, USA
| | - Alessio Caruso
- Department of Chemistry, Vassar College, Poughkeepsie, NY, USA
| |
Collapse
|
15
|
Deb T, Anderson CM, Chattopadhyay S, Ma H, Young VG, Jensen MP. Steric and electronic effects on arylthiolate coordination in the pseudotetrahedral complexes [(Tp(Ph,Me))Ni-SAr] (Tp(Ph,Me) = hydrotris{3-phenyl-5-methyl-1-pyrazolyl}borate). Dalton Trans 2014; 43:17489-99. [PMID: 25341014 DOI: 10.1039/c4dt02726d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis and characterization of several new pseudotetrahedral arylthiolate complexes [(Tp(Ph,Me))Ni-SAr] (Tp(Ph,Me) = hydrotris{3-phenyl-5-methyl-1-pyrazolyl}borate; Ar = Ph, 2,4,6-(i)Pr3C6H2, C6H4-4-Cl, C6H4-4-Me, C6H4-4-OMe) are reported, including X-ray crystal structures of the first two complexes. With prior results, two series of complexes are spanned, [(Tp(Ph,Me))Ni-S-2,4,6-RC6H2] (R'' = H, Me, (i)Pr) plus the xylyl analogue [(Tp(Ph,Me))Ni-S-2,6-Me2C6H3], as well as [(Tp(Ph,Me))Ni-S-C6H4-4-Y] (Y = Cl, H, Me, OMe), intended to elucidate steric and/or electronic effects on arylthiolate coordination. In contrast to [(Tp(Me,Me))Ni-SAr] analogues that adopt a sawhorse conformation, the ortho-disubstituted complexes show enhanced trigonal and Ni-S-Ar bending, reflecting the size of the 3-pyrazole substituents. Moreover, weakened scorpionate ligation is implied by spectroscopic data. Little spectroscopic effect is observed in the series of para-substituted complexes, suggesting the observed effects are primarily steric in origin. The relatively electron-rich and encumbered complex [(Tp(Ph,Me))Ni-S-2,4,6-(i)Pr3C6H2] behaves uniquely when dissolved in CH3CN, forming a square planar solvent adduct with a bidentate scorpionate ligand, [(κ(2)-Tp(Ph,Me))Ni(NCMe)(S-2,4,6-(i)Pr3C6H2)]. This adduct was isolated and characterized by X-ray crystallography. Single-point DFT and TD-DFT calculations on a simplified [(κ(2)-Tp)Ni(NCMe)(SPh)] model were used to clarify the electronic spectrum of the adduct, and to elucidate differences between Ni-SAr bonding and spectroscopy between pseudotetrahedral and square planar geometries.
Collapse
Affiliation(s)
- Tapash Deb
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, USA.
| | | | | | | | | | | |
Collapse
|
16
|
Su H, Chen X, Fang W. ON–OFF Mechanism of a Fluorescent Sensor for the Detection of Zn(II), Cd(II), and Cu(II)Transition Metal Ions. Anal Chem 2013; 86:891-9. [DOI: 10.1021/ac4034592] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Huizhen Su
- Key Laboratory of Theoretical and Computational
Photochemistry of Ministry of Education, Department of
Chemistry, Beijing Normal University, Xin-wai-da-jie No. 19, Beijing 100875, People’s Republic of China
| | - Xuebo Chen
- Key Laboratory of Theoretical and Computational
Photochemistry of Ministry of Education, Department of
Chemistry, Beijing Normal University, Xin-wai-da-jie No. 19, Beijing 100875, People’s Republic of China
| | - Weihai Fang
- Key Laboratory of Theoretical and Computational
Photochemistry of Ministry of Education, Department of
Chemistry, Beijing Normal University, Xin-wai-da-jie No. 19, Beijing 100875, People’s Republic of China
| |
Collapse
|
17
|
Zhu RM, Hu L, Li YZ, Song Y, Zuo JL. Syntheses, crystal structures and properties of dinuclear hydrido-tris(3,5-diphenylpyrazol-1-yl)borate complexes with the S―S coupled and dimerized quinoxaline-2,3-dithiolate ligand. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.05.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
18
|
|
19
|
McLaughlin MP, Retegan M, Bill E, Payne TM, Shafaat HS, Peña S, Sudhamsu J, Ensign AA, Crane BR, Neese F, Holland PL. Azurin as a protein scaffold for a low-coordinate nonheme iron site with a small-molecule binding pocket. J Am Chem Soc 2012; 134:19746-57. [PMID: 23167247 PMCID: PMC3515693 DOI: 10.1021/ja308346b] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The apoprotein of Pseudomonas aeruginosa azurin binds iron(II) to give a 1:1 complex, which has been characterized by electronic absorption, Mössbauer, and NMR spectroscopies, as well as X-ray crystallography and quantum-chemical computations. Despite potential competition by water and other coordinating residues, iron(II) binds tightly to the low-coordinate site. The iron(II) complex does not react with chemical redox agents to undergo oxidation or reduction. Spectroscopically calibrated quantum-chemical computations show that the complex has high-spin iron(II) in a pseudotetrahedral coordination environment, which features interactions with side chains of two histidines and a cysteine as well as the C═O of Gly45. In the (5)A(1) ground state, the d(z(2)) orbital is doubly occupied. Mutation of Met121 to Ala leaves the metal site in a similar environment but creates a pocket for reversible binding of small anions to the iron(II) center. Specifically, azide forms a high-spin iron(II) complex and cyanide forms a low-spin iron(II) complex.
Collapse
Affiliation(s)
| | - Marius Retegan
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr, Germany
| | - Eckhard Bill
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr, Germany
| | - Thomas M. Payne
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853
| | - Hannah S. Shafaat
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr, Germany
| | - Salvador Peña
- Department of Chemistry, University of Rochester, Rochester, New York 14618
| | - Jawahar Sudhamsu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853
| | - Amy A. Ensign
- Department of Chemistry, University of Rochester, Rochester, New York 14618
| | - Brian R. Crane
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853
| | - Frank Neese
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr, Germany
| | - Patrick L. Holland
- Department of Chemistry, University of Rochester, Rochester, New York 14618
| |
Collapse
|
20
|
Coggins MK, Toledo S, Shaffer E, Kaminsky W, Shearer J, Kovacs JA. Characterization and dioxygen reactivity of a new series of coordinatively unsaturated thiolate-ligated manganese(II) complexes. Inorg Chem 2012; 51:6633-44. [PMID: 22642272 DOI: 10.1021/ic300192q] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis, structural, and spectroscopic characterization of four new coordinatively unsaturated mononuclear thiolate-ligated manganese(II) complexes ([Mn(II)(S(Me2)N(4)(6-Me-DPEN))](BF(4)) (1), [Mn(II)(S(Me2)N(4)(6-Me-DPPN))](BPh(4))·MeCN (3), [Mn(II)(S(Me2)N(4)(2-QuinoPN))](PF(6))·MeCN·Et(2)O (4), and [Mn(II)(S(Me2)N(4)(6-H-DPEN)(MeOH)](BPh(4)) (5)) is described, along with their magnetic, redox, and reactivity properties. These complexes are structurally related to recently reported [Mn(II)(S(Me2)N(4)(2-QuinoEN))](PF(6)) (2) (Coggins, M. K.; Kovacs, J. A. J. Am. Chem. Soc.2011, 133, 12470). Dioxygen addition to complexes 1-5 is shown to result in the formation of five new rare examples of Mn(III) dimers containing a single, unsupported oxo bridge: [Mn(III)(S(Me2)N(4)(6-Me-DPEN)](2)-(μ-O)(BF(4))(2)·2MeOH (6), [Mn(III)(S(Me2)N(4)(QuinoEN)](2)-(μ-O)(PF(6))(2)·Et(2)O (7), [Mn(III)(S(Me2)N(4)(6-Me-DPPN)](2)-(μ-O)(BPh(4))(2) (8), [Mn(III)(S(Me2)N(4)(QuinoPN)](2)-(μ-O)(BPh(4))(2) (9), and [Mn(III)(S(Me2)N(4)(6-H-DPEN)](2)-(μ-O)(PF(6))(2)·2MeCN (10). Labeling studies show that the oxo atom is derived from (18)O(2). Ligand modifications, involving either the insertion of a methylene into the backbone or the placement of an ortho substituent on the N-heterocyclic amine, are shown to noticeably modulate the magnetic and reactivity properties. Fits to solid-state magnetic susceptibility data show that the Mn(III) ions of μ-oxo dimers 6-10 are moderately antiferromagnetically coupled, with coupling constants (2J) that fall within the expected range. Metastable intermediates, which ultimately convert to μ-oxo bridged 6 and 7, are observed in low-temperature reactions between 1 and 2 and dioxygen. Complexes 3-5, on the other hand, do not form observable intermediates, thus illustrating the effect that relatively minor ligand modifications have upon the stability of metastable dioxygen-derived species.
Collapse
Affiliation(s)
- Michael K Coggins
- The Department of Chemistry, University of Washington, Campus Box 351700, Seattle, Washington 98195-1700, USA
| | | | | | | | | | | |
Collapse
|
21
|
Gennari M, Gerey B, Hall N, Pécaut J, Vezin H, Collomb MN, Orio M, Duboc C. Structural, spectroscopic and redox properties of a mononuclear CoII thiolate complex – the reactivity toward S-alkylation: an experimental and theoretical study. Dalton Trans 2012; 41:12586-94. [DOI: 10.1039/c2dt31222k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
22
|
López-Banet L, Santana MD, García G, Pérez J, García L, Lezama L, Liu M. Networks based on hydrogen-bonds containing phosphorus anions and tris(3,5-dimethylpyrazolyl)borate nickel(II) moieties. Polyhedron 2012. [DOI: 10.1016/j.poly.2011.10.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
23
|
Abstract
The reactivity of the anionic dinitrogen complex [(TPB)Fe(N(2))](-) (TPB = tris[2-(diisopropylphosphino)phenyl]borane) toward silicon electrophiles has been examined. [(TPB)Fe(N(2))](-) reacts with trimethylsilyl chloride to yield the silyldiazenido complex (TPB)Fe(NNSiMe(3)), which is reduced by Na/Hg in THF to yield the corresponding sodium-bound anion [(TPB)Fe(NNSiMe(3))]Na(THF). The use of 1,2-bis(chlorodimethylsilyl)ethane in the presence of excess Na/Hg results in the disilylation of the bound N(2) molecule to yield the disilylhydrazido(2-) complex (TPB)Fe≡NR (R = 2,2,5,5-tetramethyl-1-aza-2,5-disilacyclopentyl). One of the phosphine arms of TPB in (TPB)Fe≡NR can be substituted by CO or (t)BuNC to yield crystalline adducts (TPB)(L)Fe≡NR (L = CO, (t)BuNC). The N-N bond in (TPB)((t)BuNC)Fe≡NR is cleaved upon standing at room temperature to yield a phosphoraniminato/disilylamido iron(II) complex. The flexibility of the Fe-B linkage is thought to play a key role in these transformations of Fe-bound dinitrogen.
Collapse
Affiliation(s)
- Marc-Etienne Moret
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | | |
Collapse
|
24
|
Type 1 copper site synthetic model complexes with increased redox potentials. J Biol Inorg Chem 2011; 17:285-91. [PMID: 21960257 DOI: 10.1007/s00775-011-0849-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Accepted: 09/19/2011] [Indexed: 10/17/2022]
Abstract
Reactions of NaSCPh(3) with (R(3)tacn)Cu(OTf)(2) (R is Me, iPr; tacn is 1,4,7-triazacyclononane; OTf is CF(3)SO(3)(-)) yield blue complexes identified as ((R(3)tacn)CuSCPh(3))(OTf) on the basis of UV-vis, resonance Raman, and electron paramagnetic resonance (EPR) spectroscopy and electrospray ionization mass spectrometry. These complexes exhibit spectroscopic properties typical of type 1 copper sites in proteins, including diagnostic Sπ → Cu(d(x(2)-y(2))) ligand-to-metal charge transfer transitions at approximately 610-630 nm and small A(||) values in EPR spectra of less than 100 × 10(-4) cm(-1). Cyclic voltammetry experiments revealed redox potentials for the complexes similar to those of several low-potential type 1 copper proteins (e.g., azurin, stellacyanin) and approximately 0.5 V higher than those of previously reported model compounds. Thus, the new complexes mimic key aspects of both the structure and the function of type 1 copper sites.
Collapse
|
25
|
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.
Collapse
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
| | | | | | | | | | | | | |
Collapse
|
26
|
Half-sandwich scorpionate nickel complexes with aliphatic dicarboxylic acid co-ligands. TRANSIT METAL CHEM 2011. [DOI: 10.1007/s11243-011-9511-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
27
|
Harding DJ, Harding P, Dokmaisrijan S, Adams H. Redox-active nickel and cobalt tris(pyrazolyl)borate dithiocarbamate complexes: air-stable Co(ii) dithiocarbamates. Dalton Trans 2011; 40:1313-21. [DOI: 10.1039/c0dt01010c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
28
|
López-Banet L, Santana MD, García G, García L, Pérez J, Rojo T, Lezama L, Costes JP. Crystal Structures and Magnetic Properties of Nickel Complexes with Hydrotris(pyrazolyl)borate Ligand and Double Bridged by Phosphate Esters. Inorg Chem 2010; 50:437-43. [DOI: 10.1021/ic100980x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Luisa López-Banet
- Departamento de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - M. Dolores Santana
- Departamento de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - Gabriel García
- Departamento de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - Luis García
- Departamento de Ingeniería Minera, Geológica y Cartográfica, Área de Química Inorgánica, Universidad Politécnica de Cartagena, E-30203 Cartagena, Spain
| | - José Pérez
- Departamento de Ingeniería Minera, Geológica y Cartográfica, Área de Química Inorgánica, Universidad Politécnica de Cartagena, E-30203 Cartagena, Spain
| | - Teófilo Rojo
- Departamento de Química Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco, E-48080 Bilbao, Spain
| | - Luis Lezama
- Departamento de Química Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco, E-48080 Bilbao, Spain
| | - Jean-Pierre Costes
- Laboratoire de Chimie de Coordination du CNRS, UPR 8241, liée par conventions à l’Université Paul Sabatier et à l’Institut National Polytechnique de Toulouse, 205 route de Narbonne, 31077 Toulouse Cedex, France
| |
Collapse
|
29
|
Varonka MS, Warren TH. S-nitrosothiol and nitric oxide reactivity at zinc thiolates. Inorg Chem 2010; 48:5605-7. [PMID: 19469478 DOI: 10.1021/ic900664r] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
S-Nitrosothiols undergo reversible transnitrosation reactions at tris(pyrazolyl)boratozinc thiolates (iPr2)TpZn-SR. These zinc thiolates are unreactive toward anaerobic NO but rapidly react with NO in the presence of O(2) or anaerobically with NO(2) to release the S-nitrosothiol RSNO with formation of the corresponding zinc nitrate.
Collapse
Affiliation(s)
- Matthew S Varonka
- Department of Chemistry, Georgetown University, Box 571227, Washington, DC 20057, USA
| | | |
Collapse
|
30
|
Abstract
This review traces the development and application of the tris(thioether)borate ligands, tripodal ligands with highly polarizable thioether donors. Areas of emphasis include the basic coordination chemistry of the mid-to-late first row transition metals (Fe, Ni, Co, Cu), and the role of the thioether substituent in directing complex formation, the modeling of zinc thiolate protein active sites, high-spin organo-iron and organo-cobalt chemistry, the preparation of monovalent complexes of Fe, Co and Ni, and dioxygen and sulfur activation by monovalent nickel complexes.
Collapse
Affiliation(s)
- Charles G. Riordan
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| |
Collapse
|
31
|
Van Heuvelen KM, Cho J, Dingee T, Riordan CG, Brunold TC. Spectroscopic and computational studies of a series of high-spin Ni(II) thiolate complexes. Inorg Chem 2010; 49:6535-44. [PMID: 20565082 DOI: 10.1021/ic100362q] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The electronic structures of a series of high-spin Ni(II)-thiolate complexes of the form [PhTt(tBu)]Ni(SR) (R = CPh(3), 2; C(6)F(5), 3; C(6)H(5), 4; PhTt(tBu) = phenyltris((tert-butylthio)methyl)borate) have been characterized using a combined spectroscopic and computational approach. Resonance Raman (rR) spectroscopic data reveal that the nu(Ni-SR) vibrational feature occurs between 404 and 436 cm(-1) in these species. The corresponding rR excitation profiles display a striking de-enhancement behavior because of interference effects involving energetically proximate electronic excited states. These data were analyzed in the framework of time-dependent Heller theory to obtain quantitative insight into excited state nuclear distortions. The electronic absorption and magnetic circular dichroism spectra of 2-4 are characterized by numerous charge transfer (CT) transitions. The dominant absorption feature, which occurs at approximately 18,000 cm(-1) in all three complexes, is assigned as a thiolate-to-Ni CT transition involving molecular orbitals that are of pi-symmetry with respect to the Ni-S bond, reminiscent of the characteristic absorption feature of blue copper proteins. Density functional theory computational data provide molecular orbital descriptions for 2-4 and allow for detailed assignments of the key spectral features. A comparison of the results obtained in this study to those reported for similar Ni-thiolate species reveals that the supporting ligand plays a secondary role in determining the spectroscopic properties, as the electronic structure is primarily determined by the metal-thiolate bonding interaction.
Collapse
|
32
|
Lugo (neé Gushwa) AF, Richards AF. Ketiminato and ketimine Co, Eu, Cu and Fe complexes. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.02.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
33
|
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]
|
34
|
Chattopadhyay S, Deb T, Petersen JL, Young VG, Jensen MP. Steric Titration of Arylthiolate Coordination Modes at Pseudotetrahedral Nickel(II) Centers. Inorg Chem 2009; 49:457-67. [DOI: 10.1021/ic901347p] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Tapash Deb
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701
| | - Jeffrey L. Petersen
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506
| | - Victor G. Young
- X-ray Crystallographic Laboratory, Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Michael P. Jensen
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701
| |
Collapse
|
35
|
Copper(II) nitrato and chloro complexes with sterically hindered tridentate ligands: Influence of ligand framework and charge on their structure and physicochemical properties. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.05.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
36
|
Pettinari C, Marchetti F, Pettinari R, Marinelli A, Crispini A, Bellusci A. A sterically hindered tetrakis(pyrazolyl)borate: Synthesis, characterization and coordinative behaviour. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.05.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
37
|
Rajapandian V, Hakkim V, Subramanian V. ONIOM Calculation on Azurin: Effect of Metal Ion Substitutions. J Phys Chem A 2009; 113:8615-25. [DOI: 10.1021/jp900451f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- V. Rajapandian
- Chemical Laboratory, Central Leather Research Institute, Council of Scientific and Industrial Research, Adyar, Chennai 600 020, India
| | - V. Hakkim
- Chemical Laboratory, Central Leather Research Institute, Council of Scientific and Industrial Research, Adyar, Chennai 600 020, India
| | - V. Subramanian
- Chemical Laboratory, Central Leather Research Institute, Council of Scientific and Industrial Research, Adyar, Chennai 600 020, India
| |
Collapse
|
38
|
Galardon E, Tomas A, Selkti M, Roussel P, Artaud I. Synthesis, Characterization, and Reactivity of Alkyldisulfanido Zinc Complexes. Inorg Chem 2009; 48:5921-7. [DOI: 10.1021/ic900238v] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Erwan Galardon
- Laboratoire de Chimie et Biochimie Pharmacologique et Toxicologique, UMR 8601 CNRS, Université Paris Descartes, 45 rue des Saints Pères, 75270 Paris cedex 06, France
| | - Alain Tomas
- Laboratoire de Cristallographie et RMN Biologiques, UMR 8015 CNRS, Université Paris Descartes, 4 avenue de l’Observatoire, 75270 Paris cedex 06, France
| | - Mohamed Selkti
- Laboratoire de Cristallographie et RMN Biologiques, UMR 8015 CNRS, Université Paris Descartes, 4 avenue de l’Observatoire, 75270 Paris cedex 06, France
| | - Pascal Roussel
- UCCS − Unité de Catalyse et Chimie du Solide, UMR 8012 CNRS, École Nationale Supérieure de Chimie de Lille BP 90108 − 59652 Villeneuve d’Ascq cedex, France
| | - Isabelle Artaud
- Laboratoire de Chimie et Biochimie Pharmacologique et Toxicologique, UMR 8601 CNRS, Université Paris Descartes, 45 rue des Saints Pères, 75270 Paris cedex 06, France
| |
Collapse
|
39
|
Hydrogen-bonded mononuclear nickel(II) benzoate complexes: synthesis and structural studies. TRANSIT METAL CHEM 2009. [DOI: 10.1007/s11243-009-9224-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
40
|
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
| |
Collapse
|
41
|
Harding DJ, Harding P, Daengngern R, Yimklan S, Adams H. Synthesis and characterization of redox-active tris(pyrazolyl)borate cobalt complexes. Dalton Trans 2009:1314-20. [DOI: 10.1039/b815001j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
42
|
Fujisawa K, Kanda R, Miyashita Y, Okamoto KI. Copper(II) complexes with neutral bis(pyrazolyl)methane ligands: The influence of steric hindrance on their structures and properties. Polyhedron 2008. [DOI: 10.1016/j.poly.2008.01.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
43
|
Chattopadhyay S, Deb T, Ma H, Petersen JL, Young VG, Jensen MP. Arylthiolate Coordination and Reactivity at Pseudotetrahedral Nickel(II) Centers: Modulation by Noncovalent Interactions. Inorg Chem 2008; 47:3384-92. [PMID: 18345601 DOI: 10.1021/ic702417w] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Swarup Chattopadhyay
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, and X-ray Crystallographic Laboratory, Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Tapash Deb
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, and X-ray Crystallographic Laboratory, Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Huaibo Ma
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, and X-ray Crystallographic Laboratory, Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Jeffrey L. Petersen
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, and X-ray Crystallographic Laboratory, Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Victor G. Young
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, and X-ray Crystallographic Laboratory, Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Michael P. Jensen
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, and X-ray Crystallographic Laboratory, Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| |
Collapse
|
44
|
Fujisawa K, Kakizaki T, Miyashita Y, Okamoto KI. Structural and spectroscopic comparison of five-coordinate cobalt(II) and nickel(II) thiolato complexes with the related four-coordinate complexes. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2007.08.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
45
|
Gennari M, Tegoni M, Lanfranchi M, Pellinghelli MA, Giannetto M, Marchiò L. CuI Complexes with N,N′,S,S′ Scorpionate Ligands: Evidence for Dimer−Monomer Equilibria. Inorg Chem 2008; 47:2223-32. [DOI: 10.1021/ic702108x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marcello Gennari
- Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Università degli Studi di Parma, viale G. P. Usberti 17/a, I 43100 Parma, Italy
| | - Matteo Tegoni
- Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Università degli Studi di Parma, viale G. P. Usberti 17/a, I 43100 Parma, Italy
| | - Maurizio Lanfranchi
- Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Università degli Studi di Parma, viale G. P. Usberti 17/a, I 43100 Parma, Italy
| | - Maria Angela Pellinghelli
- Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Università degli Studi di Parma, viale G. P. Usberti 17/a, I 43100 Parma, Italy
| | - Marco Giannetto
- Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Università degli Studi di Parma, viale G. P. Usberti 17/a, I 43100 Parma, Italy
| | - Luciano Marchiò
- Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Università degli Studi di Parma, viale G. P. Usberti 17/a, I 43100 Parma, Italy
| |
Collapse
|
46
|
Pandarus V, Castonguay A, Zargarian D. Ni(ii) complexes featuring non-metallated pincer-type ligands. Dalton Trans 2008:4756-61. [DOI: 10.1039/b802222d] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
47
|
Cho J, Yap GPA, Riordan CG. Structural, Spectroscopic, and Electrochemical Properties of a Series of High-Spin Thiolatonickel(II) Complexes. Inorg Chem 2007; 46:11308-15. [DOI: 10.1021/ic701743z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jaeheung Cho
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716
| | - Glenn P. A. Yap
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716
| | - Charles G. Riordan
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716
| |
Collapse
|
48
|
Dinuclear copper(I) complexes of tris(3,5-dimethylpyrazol-1-yl)methane: Synthesis, structure, and reactivity. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.05.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
49
|
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]
|
50
|
Lu CC, Peters JC. Pseudotetrahedral manganese complexes supported by the anionic tris(phosphino)borate ligand [PhBP(iPr)3]. Inorg Chem 2006; 45:8597-607. [PMID: 17029370 PMCID: PMC2920598 DOI: 10.1021/ic060735q] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper presents aspects of the coordination chemistry of mono- and divalent manganese complexes supported by the anionic tris(phosphino)borate ligand, [PhBP(i)(Pr)3] (where [PhBP(i)(Pr)3] = [PhB(CH(2)P(i)Pr2)3]-). The Mn(II) halide complexes, [PhBP(i)(Pr)3]MnCl (1) and [PhBP(i)(Pr)3]MnI (2), have been characterized by X-ray diffraction, SQUID magnetometry, and EPR spectroscopy. Compound 2 serves as a precursor to a series of Mn azide, alkyl, and amide species: [PhBP(i)(Pr)3]Mn(N3) (3), [PhBP(i)(Pr)3]Mn(CH2Ph) (4), [PhBP(i)(Pr)3]Mn(Me) (5), [PhBP(i)(Pr)3]Mn(NH(2,6-(i)Pr2-C6H3)) (6), [PhBP(i)(Pr)3]Mn(dbabh) (7), and [PhBP(i)(Pr)3]Mn(1-Ph(isoindolate)) (8). The complexes 2-8 feature a divalent-metal center and are pseudotetrahedral. They collectively represent an uncommon structural motif for low-coordinate, polyphosphine-supported Mn complexes. Two Mn(I) species have also been prepared. These include the Tl-Mn adduct [PhBP(i)(Pr)3]Tl-MnBr(CO)4 (9) and the octahedral complex [PhBP(i)(Pr)3]Mn(CN(t)Bu)3 (10). Some of our initial synthetic efforts to generate [PhBP(i)(Pr)3]MnN(x) species are briefly described, as are DFT studies that probe the electronic viability of these types of multiply bonded target structures.
Collapse
Affiliation(s)
- Connie C Lu
- Division of Chemistry and Chemical Engineering, Arnold and Mabel Beckman Laboratories of Chemical Synthesis, California Institute of Technology, Pasadena, California 91125, USA
| | | |
Collapse
|