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Lapshin IV, Cherkasov AV, Trifonov AA. Heteroleptic Bis(amido) Ca(II) and Yb(II) NHC Pincer Complexes: Synthesis, Characterization, and Catalytic Activity in Intermolecular Hydrofunctionalization of C═C Bonds. Organometallics 2023. [DOI: 10.1021/acs.organomet.2c00596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- Ivan V. Lapshin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina Str. 49, 603950 Nizhny Novgorod, GSP-445, Russia
| | - Anton V. Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina Str. 49, 603950 Nizhny Novgorod, GSP-445, Russia
| | - Alexander A. Trifonov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina Str. 49, 603950 Nizhny Novgorod, GSP-445, Russia
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova Str. 28, 119991 Moscow, GSP-1, Russia
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2
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Obi AD, Freeman LA, Coates SJ, Alexis AJH, Frey NC, Dickie DA, Webster CE, Gilliard RJ. Carbene–Calcium Silylamides and Amidoboranes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Akachukwu D. Obi
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Lucas A. Freeman
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Samuel J. Coates
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Andrew J. H. Alexis
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Nathan C. Frey
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Diane A. Dickie
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Charles Edwin Webster
- Department of Chemistry, Mississippi State University, Box 9573, Mississippi State, Mississippi 39762, United States
| | - Robert J. Gilliard
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
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Pahar S, Sharma V, Mahata B, George CP, Sharma H, Vanka K, Sen SS. Tridentate NacNac Stabilized Tin and Nickel Complexes: Access to a Monomeric Nickel Hydride and Its Catalytic Application. Inorg Chem 2022; 61:17370-17377. [PMID: 36264667 DOI: 10.1021/acs.inorgchem.2c03227] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The transmetalation reaction of picolyl-supported tridentate nacnac germylene monochloride [2,6-iPr2-C6H3NC(Me)CHC(Me)NH(CH2py)]GeCl (1) (py = pyridine) with SnCl2 results in an analogous stannylene chloride (2). The three-coordinated stannylenium cation [{2,6-iPr2-C6H3NC(Me)CHC(Me)NH(CH2py)}Sn]+ with SnCl3- as a counteranion (3) has been generated through the abstraction of chloride ligand from 2 using an additional equivalent of SnCl2. Instead of forming a donor-acceptor complex, 2 undergoes a facile redox transmetalation reaction with Ni(COD)2 (COD = cyclooctadiene) and CuCl to afford analogous nickel and copper complexes [2,6-iPr2-C6H3NC(Me)CHC(Me)NH(CH2py)]MCl [M = Ni (4) and Cu (5)]. The reactions of 4 with potassium tri-sec-butylborohydride (commonly known as K-selectride) and AgSbF6 provide access to monomeric Ni(II) hydride, [2,6-iPr2-C6H3NC(Me)CHC(Me)NH(CH2py)]NiH (6) and a Ni(II) cation, [{2,6-iPr2-C6H3NC(Me)CHC(Me)NH(CH2py)}Ni][SbF6] (7), respectively. 6 was found to be an effective catalyst for the hydroboration of amides.
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Affiliation(s)
- Sanjukta Pahar
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Vishal Sharma
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Biplab Mahata
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Christy P George
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India.,Physical and Material Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | - Himanshu Sharma
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India.,Physical and Material Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | - Kumar Vanka
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India.,Physical and Material Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | - Sakya S Sen
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
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Guo Z, Deacon GB, Junk PC. Unexpected C−F activation during redox transmetallation with silver
N,N
′‐bis(2,6‐difluorophenyl)formamidinate. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhifang Guo
- School of Chemistry Monash University Clayton 3800 Australia
- College of Science & Engineering James Cook University Townsville 4811 Qld Australia
| | - Glen B. Deacon
- School of Chemistry Monash University Clayton 3800 Australia
| | - Peter C. Junk
- College of Science & Engineering James Cook University Townsville 4811 Qld Australia
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Bokouende SS, Jenks TC, Ward CL, Allen MJ. Solid-state and solution-phase characterization of Sm II-aza[2.2.2]cryptate and its methylated analogue. Dalton Trans 2022; 51:10852-10855. [PMID: 35781473 PMCID: PMC9650674 DOI: 10.1039/d2dt01823c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new SmII-azacryptates are reported that differ in steric hindrance and Lewis basicity of donor atoms. The sterically hindered complex has a smaller coordination number and a more negative electrochemical potential than the complex with less steric hindrance.
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Affiliation(s)
| | - Tyler C Jenks
- Deparptment of Chemistry, Wayne State University, 5101 Cass Ave., Detroit, MI 48202, USA.
| | - Cassandra L Ward
- Lumigen Instrument Center, Wayne State University, 5101 Cass Ave., Detroit, MI 48202, USA
| | - Matthew J Allen
- Deparptment of Chemistry, Wayne State University, 5101 Cass Ave., Detroit, MI 48202, USA.
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Abstract
The number of rare earth (RE) starting materials used in synthesis is staggering, ranging from simple binary metal-halide salts to borohydrides and "designer reagents" such as alkyl and organoaluminate complexes. This review collates the most important starting materials used in RE synthetic chemistry, including essential information on their preparations and uses in modern synthetic methodologies. The review is divided by starting material category and supporting ligands (i.e., metals as synthetic precursors, halides, borohydrides, nitrogen donors, oxygen donors, triflates, and organometallic reagents), and in each section relevant synthetic methodologies and applications are discussed.
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Affiliation(s)
- Fabrizio Ortu
- School of Chemistry, University of Leicester, LE1 7RH Leicester, U.K.
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Guo Z, Blair VL, Deacon GB, Junk PC. Europium is Different: Solvent and Ligand Effects on Oxidation State Outcomes and C-F Activation in Reactions Between Europium Metal and Pentafluorophenylsilver. Chemistry 2021; 28:e202103865. [PMID: 34859510 DOI: 10.1002/chem.202103865] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Indexed: 01/10/2023]
Abstract
Unique outcomes have emerged from the redox transmetallation/ protolysis (RTP) reactions of europium metal with [Ag(C6 F5 )(py)] (py=pyridine) and pyrazoles (RR'pzH). In pyridine, a solvent not normally used for RTP reactions, the products were mainly EuII complexes, [Eu(RR'pz)2 (py)4 ] (RR'pz=3,5-diphenylpyrazolate (Ph2 pz) 1; 3-(2-thienyl)-5-trifluoromethylpyrazolate (ttfpz) 2; 3-methyl-5-phenylpyrazolate (PhMepz) 3). However, use of 3,5-di-tert-butylpyrazole (tBu2 pzH) gave trivalent [Eu(tBu2 pz)3 (py)2 ] 4, whereas the bulkier N,N'-bis(2,6-difluorophenyl)formamidine (DFFormH) gave divalent [Eu(DFForm)2 (py)3 ] 5. In tetrahydrofuran (thf), the usual solvent for RTP reactions, C-F activation was observed for the first time with [Ag(C6 F5 )(py)] in such reactions. Thus trivalent [{Eu2 (Ph2 pz)4 (py)4 (thf)2 (μ-F)2 }{Eu2 (Ph2 pz)4 (py)2 (thf)4 (μ-F)2 }] (6), [Eu2 (ttfpz)4 (py)2 (dme)2 (μ-F)2 ] (7), [Eu2 (tBu2 pz)4 (dme)2 (μ-F)2 ] (8) were obtained from the appropriate pyrazoles, the last two after crystallization from 1,2-dimethoxyethane (dme). Surprisingly 3,5-dimethylpyrazole (Me2 pzH) gave the divalent cage [Eu6 (Me2 pz)10 (thf)6 (μ-F)2 ] (9). This has a compact ovoid core held together by bridging fluoride, thf, and pyrazolate ligands, the last including the rare μ4 -1η5 (N2 C3 ): 2η2 (N,N'): 3κ(N): 4κ(N') pyrazolate binding mode. With the bulky N,N'-bis(2,6-diisopropylphenyl)formamidine (DippFormH), which often favours C-F activation in RTP reactions, neither oxidation to EuIII nor C-F activation was observed and [Eu(DippForm)2 (thf)2 ] (10) was isolated. By contrast, Eu reacted with Bi(C6 F5 )3 and Ph2 pzH or tBu2 pzH in thf without C-F activation, to give [Eu(Ph2 pz)2 (thf)4 ] (11) and [Eu(tBu2 pz)3 (thf)2 ] (12) respectively, the oxidation state outcomes corresponding to that for use of [Ag(C6 F5 )(py)] in pyridine.
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Affiliation(s)
- Zhifang Guo
- School of Chemistry, Monash University, Clayton, 3800, Australia.,College of Science & Engineering, James Cook University, Townsville, 4811, Qld, Australia
| | - Victoria L Blair
- School of Chemistry, Monash University, Clayton, 3800, Australia
| | - Glen B Deacon
- School of Chemistry, Monash University, Clayton, 3800, Australia
| | - Peter C Junk
- College of Science & Engineering, James Cook University, Townsville, 4811, Qld, Australia
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