1
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Petrov PA, Filippova EA, Kompankov NB, Sukhikh TS, Sokolov MN. A NEW POLYMORPH OF THE [ReCl3(MeCN)(PPh3)2] COMPLEX AND ITS OXIDATION PRODUCTS. J STRUCT CHEM+ 2022. [DOI: 10.1134/s0022476622030131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Ouellette ET, Amaro Estrada JI, Lussier DJ, Chakarawet K, Lohrey TD, Maron L, Bergman RG, Arnold J. Spectroscopic, Magnetic, and Computational Investigations on a Series of Rhenium(III) Cyclopentadienide β-diketiminate Halide and Pseudohalide Complexes. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00516] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Erik T. Ouellette
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | | | - Daniel J. Lussier
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Khetpakorn Chakarawet
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Trevor D. Lohrey
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Laurent Maron
- LPCNO, Université de Toulouse, INSA Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Robert G. Bergman
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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3
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Weber JE, Hasanayn F, Fataftah M, Mercado BQ, Crabtree RH, Holland PL. Electronic and Spin-State Effects on Dinitrogen Splitting to Nitrides in a Rhenium Pincer System. Inorg Chem 2021; 60:6115-6124. [PMID: 33847125 DOI: 10.1021/acs.inorgchem.0c03778] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bimetallic nitrogen (N2) splitting to form metal nitrides is an attractive method for N2 fixation. Although a growing number of pincer-supported systems can bind and split N2, the precise relationship between the ligand properties and N2 binding/splitting remains elusive. Here we report the first example of an N2-bridged rhenium(III) complex, [(trans-P2tBuPyrr)ReCl2]2(μ-η1:η1-N2) (P2tBuPyrr = [2,5-(CH2PtBu2)2C4H2N]-). In this case, N2 binding occurs at a higher oxidation level than that in other reported pincer analogues. Analysis of the electronic structure through computational studies shows that the weakly π-donor pincer ligand stabilizes an open-shell electronic configuration that leads to enhanced binding of N2 in the bridged complex. Utilizing SQUID magnetometry, we demonstrate a singlet ground state for this Re-N-N-Re complex, and we offer tentative explanations for antiferromagnetic coupling of the two local S = 1 sites. Reduction and subsequent heating of the rhenium(III)-dinitrogen complex leads to chloride loss and cleavage of the N-N bond with isolation of the terminal rhenium(V) nitride complex (P2tBuPyrr)ReNCl.
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Affiliation(s)
- Jeremy E Weber
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - Faraj Hasanayn
- Department of Chemistry, American University of Beirut, Beirut 1107 2020, Lebanon
| | - Majed Fataftah
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - Brandon Q Mercado
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - Robert H Crabtree
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - Patrick L Holland
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
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4
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Lee KF, Yang T, Tsang LY, Sung HHY, Williams ID, Lin Z, Jia G. Azavinylidene Complexes from Coupling Reactions of Organonitriles with Phosphines. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00704] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kui-Fun Lee
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Tilong Yang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Long-Yiu Tsang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Herman H. Y. Sung
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Ian D. Williams
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Guochen Jia
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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5
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6
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Bruch QJ, Connor GP, Chen CH, Holland PL, Mayer JM, Hasanayn F, Miller AJM. Dinitrogen Reduction to Ammonium at Rhenium Utilizing Light and Proton-Coupled Electron Transfer. J Am Chem Soc 2019; 141:20198-20208. [DOI: 10.1021/jacs.9b10031] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Quinton J. Bruch
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Gannon P. Connor
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Chun-Hsing Chen
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Patrick L. Holland
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - James M. Mayer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Faraj Hasanayn
- Department of Chemistry, American University of Beirut, Beirut 1107 2020, Lebanon
| | - Alexander J. M. Miller
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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7
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Baumeister JE, Mitchell AW, Kelley SP, Barnes CL, Jurisson SS. Steric influence of salicylaldehyde-based Schiff base ligands on the formation of trans-[Re(PR 3) 2(Schiff base)] + complexes. Dalton Trans 2019; 48:12943-12955. [PMID: 31393493 DOI: 10.1039/c9dt02630d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Complexes of the type trans-[Re(PR3)2(Schiff base)]+ (R = ethyl and/or phenyl) 2-7 were prepared by the reaction of (nBu4N)[ReOCl4] with H2sal2en or H2sal2ibn followed by addition of a tertiary phosphine. The trans-[Re(PR3)2(sal2en)]+ complexes 2-4 were stable in solution, whereas the trans-[Re(PR3)2(sal2ibn)]+ complexes 6-7 were observed to convert to their corresponding cis-[ReO(PR3)(sal2ibn)]+ products through a process involving ligand dissociation, metal oxidation, and Schiff base ligand rearrangement. The conversion of the trans-[Re(PR3)2(sal2ibn)]+ complexes is likely driven by steric interactions between the bulky backbone gem-dimethyl groups of the sal2ibn ligand and the phosphine ligands. These complexes were isolated and characterized by 1H and 13C NMR, FT-IR spectroscopy, cyclic voltammetry, and single crystal X-ray diffraction. The results reported herein provide insight into the factors that drive trans-[Re(PR3)2(Schiff base)]+ complex formation. This will aid in the development of novel 186/188Re therapeutic agents and the design of novel bifunctional N2O2 Schiff base ligands.
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Affiliation(s)
- Jakob E Baumeister
- Department of Chemistry, University of Missouri, Columbia, MO 65211, USA.
| | - Andrew W Mitchell
- Department of Chemistry, University of Missouri, Columbia, MO 65211, USA.
| | - Steven P Kelley
- Department of Chemistry, University of Missouri, Columbia, MO 65211, USA.
| | - Charles L Barnes
- Department of Chemistry, University of Missouri, Columbia, MO 65211, USA.
| | - Silvia S Jurisson
- Department of Chemistry, University of Missouri, Columbia, MO 65211, USA.
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8
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Baumeister JE, Reinig KM, Barnes CL, Kelley SP, Jurisson SS. Technetium and Rhenium Schiff Base Compounds for Nuclear Medicine: Syntheses of Rhenium Analogues to 99mTc-Furifosmin. Inorg Chem 2018; 57:12920-12933. [PMID: 30239194 DOI: 10.1021/acs.inorgchem.8b02156] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Rhenium, the third-row congener of technetium, is often used to develop the macroscopic chemistry of potential 99mTc diagnostic radiopharmaceuticals. The rhenium analogues to 99mTc-furifosmin are being developed for potential radiotherapy of multidrug-resistant tumors. Complexes of the form trans-[MIII(PR3)2(N2O2-Schiff base)]+ are of interest for the potential imaging and treatment of multidrug-resistant tumors. Reaction of the tetradentate Schiff ligand 4,4'-[(1 E,1' E)-[ethane-1,2-diylbis(azanylylidene)]bis(methanylylidene)]bis(2,2,5,5-tetramethyl-2,5-dihydrofuran-3-ol) (tmf2enH2) with the M(V) starting materials ( nBu4N)[TcOCl4] and ( nBu4N)[ReOCl4] gave the monomeric products trans-[TcOCl(tmf2en)] and trans-[ReOCl(tmf2en)], respectively. Reduction of in situ formed trans-[ReOCl(tmf2en)] by various tertiary phosphines yielded disubstitued Re(III) products of the general type trans-[ReIII(PR3)2(tmf2en)]+. The rhenium(III) compounds were found to be water-soluble and stable in aqueous solution. Reversible ReIII/ReIV and ReIII/ReII redox processes were observed at about 0.8-0.9 and -0.65 to -0.8 V, respectively, for each of the rhenium(III) species. Reaction of in situ formed trans-TcOCl(tmf2en) with triethylphosphine yielded the reduced, disubstituted trans-[Tc(PEt3)2(tmf2en)]PF6. A reversible TcIII/TcII redox couple was observed for the technetium(III) species, about 200 mV less negative than their rhenium(III) analogues, in addition to an irreversible TcIII/TcIV process. All compounds were characterized using conventional spectroscopic techniques, single-crystal X-ray crystallography, and cyclic voltammetry.
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Affiliation(s)
- Jakob E Baumeister
- Department of Chemistry , University of Missouri , Columbia , Missouri 65211 , United States
| | - Kimberly M Reinig
- Department of Chemistry , University of Missouri , Columbia , Missouri 65211 , United States
| | - Charles L Barnes
- Department of Chemistry , University of Missouri , Columbia , Missouri 65211 , United States
| | - Steven P Kelley
- Department of Chemistry , University of Missouri , Columbia , Missouri 65211 , United States
| | - Silvia S Jurisson
- Department of Chemistry , University of Missouri , Columbia , Missouri 65211 , United States
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9
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Salvarese N, Refosco F, Seraglia R, Roverso M, Dolmella A, Bolzati C. Synthesis and characterization of rhenium(iii) complexes with (Ph 2PCH 2CH 2) 2NR diphosphinoamine ligands. Dalton Trans 2017; 46:9180-9191. [PMID: 28675225 DOI: 10.1039/c7dt01032j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of a new series of neutral, six-coordinated compounds [ReIIIX3(PNPR)], where X is Cl or Br and PNPR is a diphosphinoamine having the general formula (Ph2PCH2CH2)2NR (R = H, CH3, CH2CH3, CH2CH2CH3, CH2CH2CH2CH3 and CH2CH2OCH3) are reported. Stable [ReIIIX3(PNPR)] complexes were synthesized, in variable yields, starting from precursors where the metal was in different oxidation states (iii and v), by ligand-exchange and/or redox-substitution reactions. The compounds were characterized by elemental analysis, proton NMR spectroscopy, cyclic voltammetry, UV/vis spectroscopy, positive-ion electrospray ionization mass spectrometry (ESI(+)-MS) and X-ray diffraction analysis. Although the formulation of the complexes allows either meridional or facial isomers, the latter arrangement was prevalent both in the solid and solution states. Only [ReCl3(PNPH)] showed a meridional configuration both in solution and in the crystalline state. [ReBr3(PNPme)] prefers the meridional configuration in the crystalline state and the facial one in solution. While ESI(+)-MS and voltammetric data seem to indicate some dependency from the nature of the alkyl substituent at the nitrogen, the available structural data of the complexes show only slight differences both for angles and bond lengths upon change of the alkyl chain tethered to the nitrogen.
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10
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Sathdeo S, Schoultz X, Gerber TI, Betz R, Hosten EC. Reactivity of a benzothiazole-thiourea derivative with the oxorhenium(V) core: Isolation of rhenium(III) and (V) complexes. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.03.059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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The reaction of [ReIIICl3(t-BuNC)(PPh3)2] with aniline derivatives: Isolation of imido-Re(V) complexes and a Re(III) complex containing iminobenzoquinonate as ligand. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.04.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Palion-Gazda J, Gryca I, Machura B, Lloret F, Julve M. Synthesis, crystal structure and magnetic properties of the complex [ReCl 3(tppz)]·MeCN. RSC Adv 2015. [DOI: 10.1039/c5ra21466a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The paper reports the synthesis, X-ray structure and a deep analysis of the variable-temperature magnetic data of the new complex [ReCl3(tppz)]·MeCN being a very scarce example of mononuclear Re(iii) complexes incorporating nitrogen donor ligands.
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Affiliation(s)
- J. Palion-Gazda
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40006 Katowice
- Poland
| | - I. Gryca
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40006 Katowice
- Poland
| | - B. Machura
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40006 Katowice
- Poland
| | - Francesc Lloret
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Facultat de Química de la Universitat de València
- 46980 Paterna
- Spain
| | - Miguel Julve
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Facultat de Química de la Universitat de València
- 46980 Paterna
- Spain
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13
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Ranis LG, Werellapatha K, Pietrini NJ, Bunker BA, Brown SN. Metal and Ligand Effects on Bonding in Group 6 Complexes of Redox-Active Amidodiphenoxides. Inorg Chem 2014; 53:10203-16. [DOI: 10.1021/ic501222n] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Leila G. Ranis
- Department
of Chemistry and Biochemistry and ‡Department of Physics, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556-5670, United States
| | - Kalpani Werellapatha
- Department
of Chemistry and Biochemistry and ‡Department of Physics, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556-5670, United States
| | - Nicholas J. Pietrini
- Department
of Chemistry and Biochemistry and ‡Department of Physics, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556-5670, United States
| | - Bruce A. Bunker
- Department
of Chemistry and Biochemistry and ‡Department of Physics, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556-5670, United States
| | - Seth N. Brown
- Department
of Chemistry and Biochemistry and ‡Department of Physics, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556-5670, United States
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14
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Rotsch DA, Reinig KM, Weis EM, Taylor AB, Barnes CL, Jurisson SS. Novel rhenium(III, IV, and V) tetradentate N2O2 Schiff base mononuclear and dinuclear complexes. Dalton Trans 2013; 42:11614-25. [PMID: 23824208 PMCID: PMC3777258 DOI: 10.1039/c3dt51198g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reaction of (Bu4N)[ReOCl4] with the tetradentate Schiff base ligand α,α'-[(1,1-dimethylethylene)dinitrilo]di-o-cresol (sal2ibnH2) yields cis-[Re(V)OCl(sal2ibn)], which quickly forms trans-[μ-O(Re(V)O(sal2ibn))2] in solution. The dinuclear complex can also be isolated by the addition of base (Et3N) to the reaction mixture. Conversely, the mononuclear complex can be trapped as cis-[Re(V)O(NCS)(sal2ibn)] by addition of (Bu4N)SCN to the reaction mixture. Reduction of cis-[Re(V)O(NCS)sal2ibn] with triphenylphosphine gives the rare trans-[Re(III)(NCS)(PPh3)(sal2ibn)] and unique μ-oxo Re(IV) dimer trans-[μ-O(Re(IV)(NCS)(sal2ibn))2]. All of the complexes were characterized by (1)H and (13)C NMR, FT-IR spectroscopy, electrospray ionization mass spectrometry (ESI-MS), cyclic voltammetry and single crystal X-ray diffraction.
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Affiliation(s)
- David A. Rotsch
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211; Fax 573-882-2754; Tel: 573-882-2107
- University of Missouri Research Reactor (MURR), University of Missouri-Columbia, Columbia. MO, 65211
| | - Kimberly M. Reinig
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211; Fax 573-882-2754; Tel: 573-882-2107
| | - Eric M. Weis
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211; Fax 573-882-2754; Tel: 573-882-2107
| | - Anna B. Taylor
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211; Fax 573-882-2754; Tel: 573-882-2107
| | - Charles L. Barnes
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211; Fax 573-882-2754; Tel: 573-882-2107
| | - Silvia S. Jurisson
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211; Fax 573-882-2754; Tel: 573-882-2107
- University of Missouri Research Reactor (MURR), University of Missouri-Columbia, Columbia. MO, 65211
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15
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Lane SR, Sisay N, Carney B, Dannoon S, Williams S, Engelbrecht HP, Barnes CL, Jurisson SS. Re(V) and Re(III) complexes with sal2phen and triphenylphosphine: rearrangement, oxidation and reduction. Dalton Trans 2011; 40:269-76. [PMID: 21079821 PMCID: PMC3059235 DOI: 10.1039/c0dt00993h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactions of Re(V), tetradentate Schiff base complexes with tertiary phosphines have previously yielded both rearranged Re(V) and reduced Re(III) complexes. To further understand this chemistry, the rigid diiminediphenol (N(2)O(2)) Schiff base ligand sal(2)phen (N,N'-o-phenylenebis(salicylaldimine)) was reacted with (n-Bu(4)N)[ReOCl(4)] to yield trans-[ReOCl(sal(2)phen)] (1). On reaction with triphenylphosphine (PPh(3)), a rearranged Re(V) product cis-[ReO(PPh(3))(sal(2)phen*)]PF(6) (2), in which one of the imines was reduced to an amine during the reaction, and the reduced Re(III) products trans-[ReCl(PPh(3))(sal(2)phen)] (4) and trans-[Re(PPh(3))(2)(sal(2)phen)](+) (5) were isolated. Reaction of sal(2)phen with [ReCl(3)(PPh(3))(2)(CH(3)CN)] resulted in the isolation of [ReCl(2)(PPh(3))(2)(salphen)] (3). The compounds were characterized using standard spectroscopic methods, elemental analyses and single crystal X-ray crystallography.
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Affiliation(s)
| | - Nebiat Sisay
- Department of Chemistry, University of Missouri, Columbia, MO 65211
| | - Brett Carney
- Department of Chemistry, University of Missouri, Columbia, MO 65211
| | - Shorouk Dannoon
- Department of Chemistry, University of Missouri, Columbia, MO 65211
| | - Stephen Williams
- Department of Chemistry, University of Missouri, Columbia, MO 65211
| | - Hendrik Petrus Engelbrecht
- Department of Chemistry, University of Missouri, Columbia, MO 65211
- University of Missouri Research Reactor (MURR), University of Missouri, Columbia, MO 65211
| | | | - Silvia Sabine Jurisson
- Department of Chemistry, University of Missouri, Columbia, MO 65211
- University of Missouri Research Reactor (MURR), University of Missouri, Columbia, MO 65211
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16
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Vieites M, Smircich P, Guggeri L, Marchán E, Gómez-Barrio A, Navarro M, Garat B, Gambino D. Synthesis and characterization of a pyridine-2-thiol N-oxide gold(I) complex with potent antiproliferative effect against Trypanosoma cruzi and Leishmania sp. insight into its mechanism of action. J Inorg Biochem 2009; 103:1300-6. [DOI: 10.1016/j.jinorgbio.2009.02.011] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2008] [Revised: 02/18/2009] [Accepted: 02/18/2009] [Indexed: 12/24/2022]
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17
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Machura B, Wolff M, Kruszynski R, Mroziński J, Kusz J. Novel rhenium(III) complexes with the picolinate ligand: Synthesis, spectroscopic investigations, X-ray structures and DFT calculations for [ReX2(pic)(PPh3)2] complexes. Polyhedron 2009. [DOI: 10.1016/j.poly.2009.05.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Synthesis and structural characterisation of new Re(III) complexes using aldimines of α-amino acids as coligands. Polyhedron 2007. [DOI: 10.1016/j.poly.2007.03.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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19
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Ünaleroğlu C, Mert Y, Zümreoğlu-Karan B. SYNTHESIS AND CHARACTERIZATION OF COPPER ASCORBATE. ACTA ACUST UNITED AC 2006. [DOI: 10.1081/sim-100107700] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Canan Ünaleroğlu
- a Department of Chemistry , Hacettepe University , Beytepe Campus, Ankara, 06532, Turkey
| | - Yüksel Mert
- a Department of Chemistry , Hacettepe University , Beytepe Campus, Ankara, 06532, Turkey
| | - Birgül Zümreoğlu-Karan
- a Department of Chemistry , Hacettepe University , Beytepe Campus, Ankara, 06532, Turkey
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The reactivity of [ReBr3(MeCN)(dppe)] towards gaseous nitric oxide. The X-ray structure of [ReBr3(MeCN)(dppe)] and [ReBr3(NO)(dppe)]0.57[ReOBr3(dppe)]0.43 and DFT calculations for [ReBr3(NO)(dppe)] and [ReOBr3(dppe)]. J Mol Struct 2005. [DOI: 10.1016/j.molstruc.2005.01.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Machura B, Kruszynski R, Jaworska M, Lodowski P. Crystal, molecular and electronic structure of the [ReCl3(bipy)(PPh3)] complex. Polyhedron 2005. [DOI: 10.1016/j.poly.2005.02.001] [Citation(s) in RCA: 10] [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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22
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Benny PD, Green JL, Engelbrecht HP, Barnes CL, Jurisson SS. Reactivity of Rhenium(V) Oxo Schiff Base Complexes with Phosphine Ligands: Rearrangement and Reduction Reactions. Inorg Chem 2005; 44:2381-90. [PMID: 15792474 DOI: 10.1021/ic048670j] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The symmetric rhenium(V) oxo Schiff base complexes trans-[ReO(OH2)(acac2en)]Cl and trans-[ReOCl(acac2pn)], where acac2en and acac2pn are the tetradentate Schiff base ligands N,N'-ethylenebis(acetylacetone) diimine and N,N'-propylenebis(acetylacetone) diimine, respectively, were reacted with monodentate phosphine ligands to yield one of two unique cationic phosphine complexes depending on the ligand backbone length (en vs pn) and the identity of the phosphine ligand. Reduction of the Re(V) oxo core to Re(III) resulted on reaction of trans-[ReO(OH2)(acac2en)]Cl with triphenylphosphine or diethylphenylphosphine to yield a single reduced, disubstituted product of the general type trans-[Re(III)(PR3)2(acac2en)]+. Rather unexpectedly, a similar reaction with the stronger reducing agent triethylphosphine yielded the intramolecularly rearranged, asymmetric cis-[Re(V)O(PEt3)(acac2en)]+ complex. Reactions of trans-[Re(V)O(acac2pn)Cl] with the same phosphine ligands yielded only the rearranged asymmetric cis-[Re(V)O(PR3)(acac2pn)]+ complexes in quantitative yield. The compounds were characterized using standard spectroscopic methods, elemental analyses, cyclic voltammetry, and single-crystal X-ray diffraction. The crystallographic data for the structures reported are as follows: trans-[Re(III)(PPh3)2(acac2en)]PF6 (H48C48N2O2P2Re.PF6), 1, triclinic (P), a = 18.8261(12) A, b = 16.2517(10) A, c = 15.4556(10) A, alpha = 95.522(1) degrees , beta = 97.130(1) degrees , gamma = 91.350(1) degrees , V = 4667.4(5) A(3), Z = 4; trans-[Re(III)(PEt2Ph)2(acac2en)]PF6 (H48C32N2O2P2Re.PF6), 2, orthorhombic (Pccn), a = 10.4753(6) A, b =18.4315(10) A, c = 18.9245(11) A, V = 3653.9(4) A3, Z = 4; cis-[Re(V)O(PEt3)(acac2en)]PF6 (H33C18N2O3PRe.1.25PF6, 3, monoclinic (C2/c), a = 39.8194(15) A, b = 13.6187(5) A, c = 20.1777(8) A, beta = 107.7730(10) degrees , V = 10419.9(7) A3, Z = 16; cis-[Re(V)O(PPh3)(acac2pn)]PF6 (H35C31N2O3PRe.PF6), 4, triclinic (P), a = 10.3094(10) A, b =12.1196(12) A, c = 14.8146(15) A, alpha = 105.939(2) degrees , beta = 105.383(2) degrees , gamma = 93.525(2) degrees , V = 1698.0(3) A3, Z = 2; cis-[Re(V)O(PEt2Ph)(acac2pn)]PF6 (H35C23N2O3PRe.PF6), 5, monoclinic (P2(1)/n), a = 18.1183(18) A, b = 11.580(1) A, c = 28.519(3) A, beta = 101.861(2) degrees , V = 5855.9(10) A(3), Z = 4.
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Affiliation(s)
- Paul D Benny
- Department of Chemistry, University of Missouri, 125 Chemistry Building, 601 S. College Avenue, Columbia, Missouri 65211, USA
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Baril-Robert F, Beauchamp AL. Preparation and electronic properties of rhenium(V) complexes with bis(diphenyl phosphino)ethane. CAN J CHEM 2003. [DOI: 10.1139/v03-143] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Complexes of bis(diphenylphosphino)ethane (dppe) of the types ReOX3(dppe) and ReO(OR)X2(dppe) (with X= Cl or Br, and R = Me, Et, Pr, Ph, cyclohexyl (Cy), or -CH2CH2OH) were prepared to evaluate the influence of ligand changes on the low-energy dd transitions in these Re(V) low-spin d2 systems. Arylimido compounds Re(NR)Cl3(dppe) (with R = Ph and p-ClC6H4) were also obtained. X-ray diffraction studies on ReO(OPr)Cl2(dppe), ReO(OPh)Br2(dppe), and ReO(OCy)Cl2(dppe) confirmed the presence of the trans O=Re-OR unit and showed that the structural characteristics of the Re-O-R segment are not affected by the presence of a bulky cyclohexyl substituent or an aromatic phenyl group. The structure of the arylimido complex Re(p-ClC6H4N)Cl3(dppe) was also determined. The electronic absorption spectra of the ReOX3(dppe) compounds include two low-energy components at ~11 500 and ~16 000 cm1, assigned to the two spin-allowed dd transitions expected for these low-symmetry systems. Substitution of the oxo ligand by an arylimido group has little effect on the lower-energy component, but moves the two components closer together. Replacing the halogen trans to the Re=O bond by an alkoxo group shifts the whole system to higher energies. These variations were found to correlate well with the energies of the frontier orbitals determined from DFT calculations. While attempting to prepare ReOCl3(dppe) from ReOCl3(PPh3)2, the Re(III) compound fac-ReCl3(PPh3){Ph2PC2H4PPh2(O)} was obtained, in which one end of dppe had become a phosphine oxide. Upon standing in DMSO, this compound gave the octahedral compound ReCl4{Ph2PC2H4PPh2(O)}, in which the formation of a chelate ring involving a phosphine and a phosphine oxide was ascertained by X-ray diffraction.Key words: rhenium, crystal structure, DFT calculations, dd electron transitions.
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The synthesis, spectroscopic investigation, crystal and molecular structure of [ReCl3(MeCN)(dppe)] complex. INORG CHEM COMMUN 2003. [DOI: 10.1016/s1387-7003(03)00107-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Mroziński J, Kochel A, Lis T. Synthesis, structure and magnetic properties of trans-tetrachloro-bis-(pyridine)-rhenium(IV). J Mol Struct 2002. [DOI: 10.1016/s0022-2860(02)00011-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Cotton FA, Dikarev EV, Petrukhina MA. Mixed chloride/phosphine complexes of the dirhenium core. 10. Redox reactions of an edge-sharing dirhenium(III) non-metal-metal-bonded complex, Re(2)(mu-Cl)(2)Cl(4)(PMe(3))(4). Inorg Chem 2001; 40:6825-31. [PMID: 11735497 DOI: 10.1021/ic010653w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reduction and oxidation reactions of the dirhenium(III) non-metal-metal-bonded edge-sharing complex, Re(2)(mu-Cl)(2)Cl(4)(PMe(3))(4) (1), have been studied. Several new mono- and dinuclear rhenium compounds have been isolated and structurally characterized in the course of this study. Reductions of 1 with 1 and 2 equiv of KC(8) result in an unusual face-sharing complex having an Re(2)(5+) core, Re(2)(mu-Cl)(3)Cl(2)(PMe(3))(4) (2), and a triply bonded Re(II) compound, 1,2,7,8-Re(2)Cl(4)(PMe(3))(4) (3), respectively. Two-electron reduction of 1 in the presence of tetrabutylammonium chloride affords a new triply bonded complex of the Re(2)(4+) core, [Bu(n)()(4)N][1,2,7-Re(2)Cl(5)(PMe(3))(3)] (4). Oxidation of 1 with NOBF(4) yields a Re(IV) mononuclear compound, trans-ReCl(4)(PMe(3))(2) (5). Two isomers of the monomeric Re(III) anion, [ReCl(4)(PMe(3))(2)](-) (6, 7), have been isolated as side products. The crystal structures of compounds 2 and 4-7 have been determined by X-ray crystallography. The Re-Re distance in the face-sharing complex 2 of 2.686(1) A is relatively short. The metal-metal bond length in anion 4 of 2.2354(7) A is consistent with the usual values for the triply bonded Re(2)(4+) core compounds. In addition, a cis arrangement of trimethylphosphine ligands in the starting material 1 is retained upon reduction in the dinuclear products 2-4.
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Affiliation(s)
- F A Cotton
- Laboratory for Molecular Structure and Bonding, P.O. Box 30012, Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, USA
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Cotton FA, Dikarev EV, Petrukhina MA. Mixed Chloride/Phosphine Complexes of the Dirhenium Core. 5. Reduction or Disproportionation at the Re(2)(6+) Unit in Reactions with Tertiary Phosphines in Different Solvents. Inorg Chem 1999; 38:3384-3389. [PMID: 11671075 DOI: 10.1021/ic990114f] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
For reactions of the octachlorodirhenium anion, [Re(2)Cl(8)](2)(-), with tertiary phosphines PEt(3) and PPr(n)(3), the influence of solvent on the reaction pathway has been studied. It has been shown that in 1-propanol at room temperature the reaction leads to a one-electron reduction of the Re(2)(6+) core. The novel dirhenium(II,III) paramagnetic products of stoichiometries [Bu(n)(4)N][Re(2)Cl(6)(PEt(3))(2)] (1a) and Re(2)Cl(5)(PPr(n)(3))(3) (2a) have been isolated and characterized. In benzene a disproportionation process occurs resulting in mononuclear rhenium(IV) complexes ReCl(4)(PR(3))(2) (PR(3) = PEt(3) (1b) and PPr(n)(3) (2b)) in addition to 1a and 2a, respectively. The solid state structures of compounds 1a, 1b, 2a.0.25C(6)H(14), and 2b have been investigated by X-ray crystallography. The crystallographic parameters are as follows: for 1a, tetragonal space group P4(2)/m with a = 11.821(2) Å, c = 14.770(3) Å, and Z = 2; for 1b, monoclinic space group P2(1)/n with a = 8.0555(4) Å, b = 12.536(2) Å, c = 10.2041(6) Å, beta = 99.167(9) degrees, and Z = 2; for 2a.0.25C(6)H(14), monoclinic space group P2(1)/n with a = 11.7679(9) Å, b = 18.574(5) Å, c = 19.688(4) Å, beta = 93.37(2) degrees, and Z = 4; for 2b, monoclinic space group P2(1)/c with a = 8.219(2) Å, b = 11.210(1) Å, c = 14.331(3) Å, beta = 93.171(9) degrees, and Z = 2. It has also been found that the disproportionation process in benzene goes by way of an intermediate complex which is an initial product of interaction between the [Re(2)Cl(8)](2)(-) and the phosphine. In the case of the triethylphosphine ligand we formulate this complex as [Bu(n)(4)N][Re(2)Cl(7)(PEt(3))(3)] (1c).
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Affiliation(s)
- F. Albert Cotton
- Laboratory for Molecular Structure and Bonding, P.O. Box 30012, Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012
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Rakowski DuBois M, Vasquez LD, Peslherbe L, Noll BC. Regioselective Electrophilic Substitution and Addition Reactions at an N-Coordinated Pyrrolyl Ligand in (PMe2Ph)3Cl2Re(NC4H4). Organometallics 1999. [DOI: 10.1021/om9900216] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Rakowski DuBois
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309
| | - Lisa D. Vasquez
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309
| | - L. Peslherbe
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309
| | - B. C. Noll
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309
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Synthesis, characterization and structures of the novel rhenium(IV) complexes trans-[ReCl4{PPh2(OMe)}2], trans-[ReCl4{PPh2(OEt)}2] and trans-[ReCl4(OPPh3)2]. Polyhedron 1999. [DOI: 10.1016/s0277-5387(99)00017-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Pearson C, Beauchamp AL. Binding of Amino-Dialkylated Adenines to Rhenium(III) and Rhenium(IV) Centers. Inorg Chem 1998; 37:1242-1248. [PMID: 11670329 DOI: 10.1021/ic970763w] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Amino-dialkylated adenines R(2)AdH (R = Me, Et) react with ReCl(3)(MeCN)(PPh(3))(2) to form mer,cis-ReCl(3)(R(2)AdH)(2)(PPh(3)) complexes. Attempts to protonate the coordinated adenine with HCl led to the oxidized trans-ReCl(4)(R(2)AdH)(PPh(3)) compounds. In both types of complexes, the purine binds via the N3 site of the six-membered ring and makes an intramolecular N9-H.Cl hydrogen bond with a chloride ligand. A material of composition ReCl(4)(R(2)AdH)(MeCN) was obtained by reacting R(2)AdH with cis-ReCl(4)(MeCN)(2). It turned out to be a ReCl(4)[R(2)AdC(Me)=NH] complex containing a cyclic amidine ligand resulting from the insertion of the acetonitrile C&tbd1;N group in the N9-H bond of the N3-coordinated adenine unit. Crystal structures were determined for one compound of each type: ReCl(3)(Me(2)AdH)(2)(PPh(3)).2C(6)H(5)CH(3), triclinic, P&onemacr;, a = 14.181(2) Å, b = 17.591(3) Å, c = 19.015(5) Å, alpha = 76.66(2) degrees, beta = 86.80(2) degrees, gamma = 87.02(1) degrees, Z = 4, R = 0.0606; ReCl(4)(Me(2)AdH)(PPh(3)), triclinic, P&onemacr;, a = 10.391(4) Å, b = 10.801(5) Å, c = 13.651(6) Å, alpha = 89.64(4) degrees, beta = 83.49(3) degrees, gamma = 65.14(4) degrees, Z = 2, R = 0.0432; ReCl(4)[Me(2)AdC(Me)=NH].C(6)H(6).CH(2)Cl(2), monoclinic, P2(1)/c, a = 13.941(3) Å, b = 13.656(3) Å, c = 12.874(2) Å, beta = 105.47(2) degrees, Z = 4, R = 0.0406. Most of the signals in the (1)H NMR spectra of these paramagnetic species could be assigned.
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Affiliation(s)
- Céline Pearson
- Département de Chimie, Université de Montréal, C.P. 6128, Succ. Centre-ville, Montréal, QC, Canada H3C 3J7
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Pearson C, Dartiguenave M, Beauchamp AL. Structure of ReOFCl(2)(PPh(3))(2), a Crystallographic Pitfall. Inorg Chem 1996; 35:7448-7449. [PMID: 11666943 DOI: 10.1021/ic9608206] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Céline Pearson
- Département de Chimie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC, Canada H3C 3J7, and Laboratoire de Chimie Inorganique, Université P. Sabatier, 118 route de Narbonne, 31062 Toulouse, France
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