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Saha D, Sepay N. Fluxional chloro-pyrrole–Pd( ii) complex to cationic η 2-pyrrole–Pd( ii) complex: subtlety in structure-directed bonding mode. NEW J CHEM 2021. [DOI: 10.1039/d1nj00866h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The fluxional pyrrole ring of a Pd(ii) complex produces a η2-pyrrole–Pd(ii) complex. It is the first report of a η2-pyrrole complex of Pd(ii).
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Affiliation(s)
- Debajyoti Saha
- Department of Chemistry
- Krishnagar Government College
- Nadia-741 101
- India
| | - Nayim Sepay
- Department of Chemistry
- Lady Brabourne College
- Kolkata-700017
- India
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2
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Petrov PA, Laricheva YA, Sukhikh TS, Sokolov MN. Tantalum( iv) pyrazolate: new wine in the old wineskin. NEW J CHEM 2021. [DOI: 10.1039/d1nj00195g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Homoleptic binuclear Ta(iv) pyrazolate [Ta2(pz)8] with Ta–Ta distance of 3.1895(7) Å was obtained in a reaction of Ta(NMe2)5 with unsubstituted pyrazole Hpz.
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Affiliation(s)
- Pavel A. Petrov
- Nikolaev Institute of Inorganic Chemistry SB RAS
- Novosibirsk
- Russia
| | | | | | - Maxim N. Sokolov
- Nikolaev Institute of Inorganic Chemistry SB RAS
- Novosibirsk
- Russia
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3
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Huang YS, Huang GT, Liu YL, Yu JSK, Tsai YC. Reversible Cleavage/Formation of the Chromium-Chromium Quintuple Bond in the Highly Regioselective Alkyne Cyclotrimerization. Angew Chem Int Ed Engl 2017; 56:15427-15431. [PMID: 29045761 DOI: 10.1002/anie.201709583] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Indexed: 11/11/2022]
Abstract
Herein we report the employment of the quintuply bonded dichromium amidinates [Cr{κ2 -HC(N-2,6-i Pr2 C6 H3 )(N-2,6-R2 C6 H3 )}]2 (R=iPr (1), Me (7)) as catalysts to mediate the [2+2+2] cyclotrimerization of terminal alkynes giving 1,3,5-trisubstituted benzenes. During the catalysis, the ultrashort Cr-Cr quintuple bond underwent reversible cleavage/formation, corroborated by the characterization of two inverted arene sandwich dichromium complexes (μ-η6 :η6 -1,3,5-(Me3 Si)3 C6 H3 )[Cr{κ2 -HC(N-2,6-i Pr2 C6 H3 )(N-2,6-R2 C6 H3 )}]2 (R=i Pr (5), Me (8)). In the presence of σ donors, such as THF and 2,4,6-Me3 C6 H2 CN, the bridging arene 1,3,5-(Me3 Si)3 C6 H3 in 5 and 8 was extruded and 1 and 7 were regenerated. Theoretical calculations were employed to disclose the reaction pathways of these highly regioselective [2+2+2] cylcotrimerization reactions of terminal alkynes.
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Affiliation(s)
- Yu-Siang Huang
- Department of Chemistry and Frontier Research, Center on Fundamental and Applied Sciences and Matters, National Tsing Hua University, 101, Sec. 2, Guang-Fu Road, Hsinchu, 300, Taiwan
| | - Gou-Tao Huang
- Institute of Bioinformatics and Systems Biology and Department of Biological Science and Technology, National Chiao Tung University, 75 Bo-Ai Street, Hsinchu, 300, Taiwan
| | - Yao-Lun Liu
- Department of Chemistry and Frontier Research, Center on Fundamental and Applied Sciences and Matters, National Tsing Hua University, 101, Sec. 2, Guang-Fu Road, Hsinchu, 300, Taiwan
| | - Jen-Shiang K Yu
- Institute of Bioinformatics and Systems Biology and Department of Biological Science and Technology, National Chiao Tung University, 75 Bo-Ai Street, Hsinchu, 300, Taiwan
| | - Yi-Chou Tsai
- Department of Chemistry and Frontier Research, Center on Fundamental and Applied Sciences and Matters, National Tsing Hua University, 101, Sec. 2, Guang-Fu Road, Hsinchu, 300, Taiwan
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4
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Huang YS, Huang GT, Liu YL, Yu JSK, Tsai YC. Reversible Cleavage/Formation of the Chromium-Chromium Quintuple Bond in the Highly Regioselective Alkyne Cyclotrimerization. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709583] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yu-Siang Huang
- Department of Chemistry and Frontier Research; Center on Fundamental and Applied Sciences and Matters; National Tsing Hua University; 101, Sec. 2, Guang-Fu Road Hsinchu 300 Taiwan
| | - Gou-Tao Huang
- Institute of Bioinformatics and Systems Biology and Department of Biological Science and Technology; National Chiao Tung University; 75 Bo-Ai Street Hsinchu 300 Taiwan
| | - Yao-Lun Liu
- Department of Chemistry and Frontier Research; Center on Fundamental and Applied Sciences and Matters; National Tsing Hua University; 101, Sec. 2, Guang-Fu Road Hsinchu 300 Taiwan
| | - Jen-Shiang K. Yu
- Institute of Bioinformatics and Systems Biology and Department of Biological Science and Technology; National Chiao Tung University; 75 Bo-Ai Street Hsinchu 300 Taiwan
| | - Yi-Chou Tsai
- Department of Chemistry and Frontier Research; Center on Fundamental and Applied Sciences and Matters; National Tsing Hua University; 101, Sec. 2, Guang-Fu Road Hsinchu 300 Taiwan
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5
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Campbell R, Kennedy AR, McLellan R, Robertson SD, Sproules S, Mulvey RE. Contrasting the group 6 metal-metal bonding in sodium dichromate(ii) and sodium dimolybdate(ii) polymethyl complexes: synthetic, X-ray crystallographic and theoretical studies. Dalton Trans 2017; 46:5650-5659. [PMID: 28145549 DOI: 10.1039/c6dt04644d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Extending the class of group 6 metal-metal bonded methylate compounds supported by alkali metal counter-ions, the first sodium octamethylmolybdate(ii) complex [(TMEDA)Na]4Mo2Me8 and heptamethylchromate(ii) relations [(donor)Na]3Cr2Me7 (donor is TMEDA or TMCDA) are reported. The former was made by treating [(Et2O)Li]4Mo2Me8 with four equivalents of NaOtBu/TMEDA in ether; whereas the latter resulted from introducing TMEDA or TMCDA to ether solutions of octamethyldichromate [(Et2O)Na]4Cr2Me8. X-ray crystallography revealed [(TMEDA)Na]4Mo2Me8 is dimeric with square pyramidal Mo centres [including a short Mo-Mo interaction of 2.1403(3) Å] each with four methyl groups in a mutually eclipsed conformation. In dinuclear [(TMCDA)Na]3Cr2Me7 trigonal bi-pyramidal Cr centres each bond to three terminal methyl groups and one common Me bridge, that produces a strikingly short Cr-Cr contact of 1.9136(4) Å. Broken symmetry density functional theoretical calculations expose the multiconfigurational metal-metal bonding in these compounds with a Mo-Mo bond order of 3 computed for octamethylmolybdate(ii). This is contrasted by the single Cr-Cr bond in heptamethylchromate(ii) where the singlet ground state is derived by strong antiferromagnetic coupling between adjacent metal ions.
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Affiliation(s)
- Ross Campbell
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK.
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6
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Brogden DW, Turov Y, Nippe M, Li Manni G, Hillard EA, Clérac R, Gagliardi L, Berry JF. Oxidative Stretching of Metal–Metal Bonds to Their Limits. Inorg Chem 2014; 53:4777-90. [DOI: 10.1021/ic5007204] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David W. Brogden
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Yevgeniya Turov
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Michael Nippe
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Giovanni Li Manni
- Department of Chemistry, Supercomputing
Institute, and Chemical Theory Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Elizabeth A. Hillard
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Rodolphe Clérac
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Laura Gagliardi
- Department of Chemistry, Supercomputing
Institute, and Chemical Theory Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - John F. Berry
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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8
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Arumuganathan T, Volpe M, Harum B, Wurm D, Belaj F, Mösch-Zanetti NC. Unusual Nonoctahedral Geometry with Molybdenum Oxoimido Complexes Containing η2-Pyrazolate Ligands. Inorg Chem 2011; 51:150-6. [DOI: 10.1021/ic201308g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- T. Arumuganathan
- Institut für Chemie, Anorganische
Chemie, Karl-Franzens-Universität Graz, Stremayrgasse
16, A-8010 Graz, Austria
| | - Manuel Volpe
- Institut für Chemie, Anorganische
Chemie, Karl-Franzens-Universität Graz, Stremayrgasse
16, A-8010 Graz, Austria
| | - Bastian Harum
- Institut für Chemie, Anorganische
Chemie, Karl-Franzens-Universität Graz, Stremayrgasse
16, A-8010 Graz, Austria
| | - Dietmar Wurm
- Institut für Chemie, Anorganische
Chemie, Karl-Franzens-Universität Graz, Stremayrgasse
16, A-8010 Graz, Austria
| | - Ferdinand Belaj
- Institut für Chemie, Anorganische
Chemie, Karl-Franzens-Universität Graz, Stremayrgasse
16, A-8010 Graz, Austria
| | - Nadia C. Mösch-Zanetti
- Institut für Chemie, Anorganische
Chemie, Karl-Franzens-Universität Graz, Stremayrgasse
16, A-8010 Graz, Austria
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9
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Campbell R, Carrella LM, Clegg W, Mulvey RE, Rentschler E, Robertson SD, Russo L. Sodium congener of the classical lithium methylchromate dimer: synthetic, X-ray crystallographic, and magnetic studies of Me8Cr2[Na(OEt2)]4. Inorg Chem 2011; 50:4656-9. [PMID: 21486011 DOI: 10.1021/ic200471b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
One of the milestone structures in the development of transition-metal complexes with metal-metal bonds of multiple bond order was the lithium methylchromate dimer Me(8)Cr(2)[Li(donor)](4) (donor = THF or Et(2)O). Using a simple salt metathesis reaction mixing this compound with sodium tert-butoxide, the sodium congener Me(8)Cr(2)[Na(OEt(2))](4) has been synthesized as a green crystalline compound and isolated in 51% yield. Its solid-state structure was determined by single-crystal X-ray diffraction. Exhibiting exact crystallographic C(4h) symmetry, this heavier alkali-metal chromate structure is also dimeric, formally comprising a (Me(8)Cr(4))(4-) tetranionic core with four peripheral Na(+) cations carrying supporting ether ligands. Its salient feature is the long Cr···Cr distance of 3.263(2) Å, which is remarkably elongated compared to that in the lithium THF-solvated congener [1.968(2) Å]. With respect to the methyl C atoms, the Cr coordination is distorted-square-planar. Each Na(+) interacts with four methyl C atoms, and there are also some short Na···H(C) contacts. Unlike for lithium chromate, no NMR spectroscopic data could be obtained for sodium chromate. The paramagnetic character of sodium chromate was confirmed by variable-temperature magnetization measurements, which indicated antiferromagnetic behavior.
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Affiliation(s)
- Ross Campbell
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, UK
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10
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Successful extrapolation of an f-element synthetic method to the pseudo light lanthanoid, aluminium. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2010.08.007] [Citation(s) in RCA: 3] [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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11
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Saeed I, Katao S, Nomura K. Synthesis and structural analysis of half-titanocenes containing eta(2)-pyrazolato ligands, and their use in catalysis for ethylene polymerization. Inorg Chem 2009; 48:5011-20. [PMID: 19374379 DOI: 10.1021/ic9004246] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cp*TiCl(2)(L) [L = C(3)H(3)N(2) (1), 3,5-Me(2)C(3)HN(2) (2) and 3,5-(i)Pr(2)C(3)HN(2) (3)], and Cp*Ti(C(3)H(3)N(2))(3) (4) were prepared in moderate yields by treating Cp*TiCl(3) with the pyrazoles in the presence of Et(3)N or with their corresponding lithium salts in Et(2)O. The structures of 1 and 2 determined by X-ray crystallography indicate that these complexes fold a distorted tetrahedral geometry around Ti, and the pyrazolato ligands coordinate to Ti with eta(2)-N,N'-coordination mode. In contrast, one of the pyrazolato ligand in 4 coordinates to Ti with eta(1)-N-bonding, whereas the other two ligands were bound to Ti with eta(2)-N,N'-fashion. The Cp analogues, CpTiCl(2)(L) [L = C(3)H(3)N(2) (5), 3,5-Me(2)C(3)HN(2) (6), 3,5-(i)Pr(2)C(3)HN(2) (7), and 3,5-Ph(2)C(3)HN(2) (8)], were also prepared by the reaction of CpTiCl(3) with the corresponding lithium salts in Et(2)O or n-hexane. The crystallographic analyses of 5 and 6 revealed that the pyrazolato ligands coordinate to Ti with eta(2)-N,N'-coordination mode. These complexes (1-3, 5-8) exhibited moderate catalytic activities for ethylene polymerization in the presence of methylaluminoxane (MAO), and the activities were highly affected by the substituent on the pyrazolato ligand employed. Complex 1 exhibited the highest activity affording polymer with uniform molecular weight distribution, suggesting that the polymerization proceeded with uniform catalytically active species. An increase in the steric bulk in the pyrazolato ligand led to a slight decrease in the activity by the Cp* analogues, whereas the activity by the Cp analogues increased upon increasing the steric bulk in the pyrazolato ligand employed.
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Affiliation(s)
- Irfan Saeed
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0101, Japan
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12
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Kurokawa YI, Nakao Y, Sakaki S. Bonding Nature of Open-Lantern-type Dinuclear Cr(II) Complexes. Theoretical Study with the MRMP2 Method. J Phys Chem A 2009; 113:3202-9. [DOI: 10.1021/jp809597m] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yusaku I. Kurokawa
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yoshihide Nakao
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shigeyoshi Sakaki
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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13
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Abstract
This Perspective summarises the chemistry of the pyrazole ring, and reviews the metal coordination modes adopted by 1H-pyrazoles and their anions. Pyrazolide anions are probably the most versatile ligands in coordination chemistry, with 20 different terminal or bridging coordination modes having been identified so far. Metal cluster compounds supported by pyrazolido ligation are surveyed, concentrating on those reported during the past ten years. Highlights include the wide structural diversity in apparently simple main group pyrazolides; luminescence and charge-transfer complexes in coinage metal pyrazolide clusters; the use of robust metal pyrazolide clusters to construct liquid crystals, supramolecular materials and metal-organic frameworks; and supramolecular complexes formed by pyrazolide-supported metallacrowns.
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Horvath S, Gorelsky S, Gambarotta S, Korobkov I. Breaking the 1.80 Å Barrier of the CrCr Multiple Bond Between CrIIAtoms. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200804048] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Horvath S, Gorelsky S, Gambarotta S, Korobkov I. Breaking the 1.80 Å Barrier of the CrCr Multiple Bond Between CrIIAtoms. Angew Chem Int Ed Engl 2008; 47:9937-40. [DOI: 10.1002/anie.200804048] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Dezelah CL, Wiedmann MK, Mizohata K, Baird RJ, Niinistö L, Winter CH. A Pyrazolate-Based Metalorganic Tantalum Precursor That Exhibits High Thermal Stability and Its Use in the Atomic Layer Deposition of Ta2O5. J Am Chem Soc 2007; 129:12370-1. [PMID: 17894495 DOI: 10.1021/ja074043s] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Charles L Dezelah
- Laboratory of Inorganic and Analytical Chemistry, Department of Chemical Technology, Helsinki University of Technology, P.O. Box 6100, FI-02015 Espoo, Finland
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