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Uemura K, Ikeda Y, Takamori A, Takeyama T, Iwatsuki S. Asymmetrical Platinum and Rhodium Dinuclear Complex Strongly Bound to Filled d z 2 ${{_{{\rm z}{^{2}}}}}$ Complexes by Unbridged Pt-Metal Bonds: Toward Heterometallic-Extended Metal Atom Chains. Chemistry 2023; 29:e202204057. [PMID: 36585834 DOI: 10.1002/chem.202204057] [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: 12/28/2022] [Revised: 12/30/2022] [Accepted: 12/30/2022] [Indexed: 01/01/2023]
Abstract
Heterometallic extended metal atom chains (EMACs) aligned with three types of metal were rationally synthesized by forming unbridged metal-metal bonds based on the interactions between highest occupied and lowest unoccupied molecular orbitals at the d z 2 ${{_{{\rm z}{^{2}}}}}$ orbital. These chains form pentanuclear structures aligned as Rh-Pt-M-Pt-Rh with relatively large formation constants of 5.0×1013 M-2 for M=Pt and 6.3×1011 M-2 for M=Pd, while retaining their backbones in solution. In the case of M=Cu, the original Cu(+2) atoms were reduced to Cu(+1) during the synthetic process. Cu(+1) has an unprecedented trigonal bipyramidal coordination geometry. The reported synthesis based on asymmetrical dinuclear complexes provides a guideline for the synthesis of hetero-EMACs to allow several analogs through judicious combinations realized by tuning the number of metal nuclei and metal species.
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Affiliation(s)
- Kazuhiro Uemura
- Department of Chemistry and Biomolecular Science Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Yuya Ikeda
- Department of Chemistry and Biomolecular Science Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Atsushi Takamori
- Department of Chemistry and Biomolecular Science Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Tomoyuki Takeyama
- Laboratory for Zero-Carbon Energy Institute of Innovative Research, Tokyo Institute of Technology 2-12-1N1-32, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Satoshi Iwatsuki
- Department of Chemistry, Konan University, Higashinada-ku, Kobe, 658-8501, Japan
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2
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Mishra V, Thomas JM, Chinnappan S, Thirupathi N. Homoleptic cis- and trans-palladium(II) bis(guanidinato) complexes derived from N-aryl-N′,N″-di(pyridin-2-yl)- and N-aryl-N′,N″-bis(6-methylpyridin-2-yl)guanidines: Catalysts for Heck-Mizoroki coupling reactions. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Milocco F, de Vries F, Dall'Anese A, Rosar V, Zangrando E, Otten E, Milani B. Palladium alkyl complexes with a formazanate ligand: synthesis, structure and reactivity. Dalton Trans 2018; 47:14445-14451. [DOI: 10.1039/c8dt03130d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The synthesis of formazanate palladium complexes is reported. Ligand-based redox-reactions and insertions of unsaturated substrates into the Pd–CH3 bond are studied.
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Affiliation(s)
- Francesca Milocco
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
- Stratingh Institute for Chemistry
| | - Folkert de Vries
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
- Stratingh Institute for Chemistry
| | - Anna Dall'Anese
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
| | - Vera Rosar
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
| | - Ennio Zangrando
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
| | - Edwin Otten
- Stratingh Institute for Chemistry
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Barbara Milani
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
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Beesam R, Nareddula DR. Pd and Ni complexes of a novel vinylidene β-diketimine ligand: Their application as catalysts in Heck coupling and alkyne trimerization. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3696] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Raghavendra Beesam
- Department of Chemistry; Pondicherry University; Pondicherry 605 014 India
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Estevan F, Hirva P, Ofori A, Sanaú M, Špec T, Úbeda MA. Pyrazole and Pyrazolate as Ligands in the Synthesis and Stabilization of New Palladium(II) and (III) Compounds. Inorg Chem 2016; 55:2101-13. [DOI: 10.1021/acs.inorgchem.5b02506] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Francisco Estevan
- Departament de Química Inorgànica, Universitat de València, Dr. Moliner 50, 46100-Burjassot, València, Spain
| | - Pipsa Hirva
- Department of Chemistry, University of Eastern Finland, Joensuu
Campus, P.O. Box 111, FI-80101 Joensuu, Finland
| | - Albert Ofori
- Department of Chemistry, University of Eastern Finland, Joensuu
Campus, P.O. Box 111, FI-80101 Joensuu, Finland
| | - Mercedes Sanaú
- Departament de Química Inorgànica, Universitat de València, Dr. Moliner 50, 46100-Burjassot, València, Spain
| | - Tanja Špec
- Departament de Química Inorgànica, Universitat de València, Dr. Moliner 50, 46100-Burjassot, València, Spain
| | - MAngeles Úbeda
- Departament de Química Inorgànica, Universitat de València, Dr. Moliner 50, 46100-Burjassot, València, Spain
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Chen C, Bellows SM, Holland PL. Tuning steric and electronic effects in transition-metal β-diketiminate complexes. Dalton Trans 2015; 44:16654-70. [PMID: 26244489 DOI: 10.1039/c5dt02215k] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
β-Diketiminates are widely used supporting ligands for building a range of metal complexes with different oxidation states, structures, and reactivities. This Perspective summarizes the steric and electronic influences of ligand substituents on these complexes, with an eye toward informing the design of new complexes with optimized properties. The backbone and N-aryl substituents can give significant steric effects on structure, reactivity and selectivity of reactions. The electron density on the metal can be tuned by installation of electron withdrawing or donating groups on the β-diketiminate ligand as well. Examples are shown from throughout the transition metal series to demonstrate different types of effects attributable to systematic variation of β-diketiminate ligands.
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Affiliation(s)
- Chi Chen
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, USA.
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Cummins SJW, Fraser HP, Fulton JR, Coles MP, Fitchett CM. Coordination of β-Ketoimine-Derived Ligands at Main Group and Transition Metals. Aust J Chem 2015. [DOI: 10.1071/ch14546] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The β-ketoimine HC[MeC(O)][MeC(NHt-Bu)] (1H) (Me = methyl) was used as a ligand in the synthesis of organo-aluminium and gallium compounds. With Al, the NH functionality was deprotonated to form the N,O-chelating β-ketoiminate ligand in Al{HC[MeC(O)][MeC(Nt-Bu)]}Me2 (3) (t-Bu = tertiary butyl), whereas the neutral form coordinated to trimethylgallium via the oxygen atom to form the adduct GaMe3·{HC[MeC(O)][MeC(NHt-Bu)]} (4). Reaction of 1H with Ar†NH2 (Ar† = 2-t-BuC6H4) afforded the new N-aryl β-ketoimine HC[MeC(O)][MeC(NHAr†)] (2H), which reacted with Pd(OAc)2 (OAc = acetate = CH3CO2–) to afford the heteroleptic dimer {Pd[HC(MeC(O))(MeC(NAr†))](μ-OAc)}2 ([5]2). The homoleptic bis(β-ketoiminate) Pd{HC[MeC(O)][MeC(NAr†)]}2 (6) was isolated as a minor product of this reaction. The crystal structures of compounds 3, 4, [5]2, and 6 are reported.
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Morris WD, Wolczanski PT, Sutter J, Meyer K, Cundari TR, Lobkovsky EB. Iron and chromium complexes containing tridentate chelates based on nacnac and imino- and methyl-pyridine components: triggering C-X bond formation. Inorg Chem 2014; 53:7467-84. [PMID: 25010819 DOI: 10.1021/ic500807y] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Nacnac-based tridentate ligands containing a pyridyl-methyl and a 2,6-dialkyl-phenylamine (i.e., (2,6-R2-C6H3N═C(Me)CH═C(Me)NH(CH2py); R = Et, {Et(nn)PM}H; R = (i)Pr, {(i)Pr(nn)PM}H) were synthesized by condensation routes. Treatment of M{N(TMS)2}THFn (M = Cr, n = 2; M = Fe, Co, n = 1; TMS = trimethylsilane; THF = tetrahydrofuran) with {(i)Pr(nn)PM}H) afforded {(i)Pr(nn)PM}MN(TMS)2 (1-M(iPr); M = Cr, Fe); {Et(nn)PM}MN(TMS)2 (1-M(Et); M = Fe, Co) was similarly obtained. {R(nn)PM}FeBr (R = (i)Pr, Et; 2-Fe(R)) were prepared from FeBr2 and {R(nn)PM}Li, and alkylated to generate {R(nn)PM}Fe(neo)Pe (R = (i)Pr, Et; 3-Fe(R)). Carbonylation of 3-Fe(R) provided {(i)Pr(nn)PM}Fe(CO(neo)Pe)CO (4-Fe(iPr)), and carbonylations of 1-Fe(R) (R = Et, (i)Pr) and 1-Cr(iPr) induced deamination to afford {R(nn)PI}Fe(CO)2 (R = (i)Pr, 5-Fe(iPr); Et, 5-Fe(Et)), where PI is pyridine-imine, and {κ(2)-N,N-pyrim-pyr}Cr(CO)4 (6-Cr(iPr)), in which the aryl-amide side of the nacnac attacked the incipient PI group. Carbon-carbon bonds were formed at the imine carbon of the {R(nn)PI} ligand. Addition of [{(i)Pr(nn)PI}(2-)](K(+)(THF)x)2 to FeCl3 generated {(i)Pr(nn)CHpy}2Fe2Cl2 (7-Fe(iPr)), and TMSN3 induced the deamination of 1-Fe(Et), but with disproportionation to provide {[Et(nn)CHpy]2}Fe (8-Fe(Et)). Ph2CN2 induced C-C bond formation with 1-Fe(iPr) via its thermal degradation to ultimately afford {(i)Pr(nn)CHpy}2(FeN═CPh2)2 (9-Fe(iPr)). The compounds were examined by X-ray crystallography (1-M(iPr), M = Cr, Fe; 1-Co(Et); 2-Fe(iPr); 4-Fe(iPr); 5-Fe(iPr); 6-Cr(iPr); 7-Fe(iPr); 8-Fe(Et); 9-Fe(iPr)), Mössbauer spectroscopy, and NMR spectroscopy. Structural parameters assessing redox noninnocence are discussed, as are structural and mechanistic consequences of the various electronic environments.
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Affiliation(s)
- Wesley D Morris
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University , Ithaca, New York 14853, United States
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Williams VA, Wolczanski PT, Sutter J, Meyer K, Lobkovsky EB, Cundari TR. Iron complexes derived from {nacnac-(CH2py)2}- and {nacnac-(CH2py)(CHpy)}n ligands: stabilization of iron(II) via redox noninnocence. Inorg Chem 2014; 53:4459-74. [PMID: 24762120 DOI: 10.1021/ic5001123] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nacnac-based tetradentate chelates, {nacnac-(CH2py)2}(-) ({nn(PM)2}(-)) and {nacnac-(CH2py)(CHpy)}(n) ({nn(PM)(PI)}(n)) have been investigated in iron complexes. Treatment of Fe{N(TMS)2}2(THF) with {nn(PM)2}H afforded {nn(PM)2}FeN(TMS)2 [1-N(TMS)2], which led to {nn(PM)2}FeCl (1-Cl) from HCl and to {nn(PM)2}FeN3 (1-N3) upon salt metathesis. Dehydroamination of 1-N(TMS)2 was induced by L (L = PMe3, CO) to afford {nn(PM)(PI)}Fe(PMe3)2 [2-(PMe3)2] and {nn(PM)(PI)}FeCO (3-CO). Substitution of 2-(PMe3)2 led to {nn(PM)(PI)}Fe(PMe3)CO [2-(PMe3)CO], and exposure to a vacuum provided {nn(PM)(PI)}Fe(PMe3) (3-PMe3). Metathesis routes to {nn(PM)(PI)}FeL2 (2-L2; L = PMe3, PMe2Ph) and {nn(PM)(PI)}FeL (3-L; L = PMePh2, PPh3) from [{nn(PM)(PI)}(2-)]Li2 and FeBr2(THF)2 in the presence of L proved feasible, and 1e(-) and 2e(-) oxidation of 2-(PMe3)2 afforded 2(+)-(PMe3)2 and 2(2+)-(PMe3)2 salts. Mössbauer spectroscopy, structural studies, and calculational assessments revealed the dominance of iron(II) in both high-spin (1-X) and low-spin (2-L2 and 3-L) environments, and the redox noninnocence (RNI) of {nn(PM)(PI)}(n) [2-L2, 3-L, n = 2-; 2(+)-(PMe3)2, n = 1-; 2(2+)-(PMe3)2, n = 0]. A discussion regarding the utility of RNI in chemical reactivity is proffered.
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Affiliation(s)
- Valerie A Williams
- Baker Laboratory, Department of Chemistry & Chemical Biology, Cornell University , Ithaca, New York 14853, United States
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Chisholm MH, Choojun K, Chow AS, Fraenkel G, Gallucci JC. THF Exchange and Molecular Dynamics in the Series (BDI)MgX(THF), Where X = Bun, NEt2, and OBut and BDI = 2-[(2,6-Diisopropylphenyl)amino]-4-[(2,6-diisopropylphenyl)imino]pent-2-ene. Inorg Chem 2013; 52:11302-10. [PMID: 24066833 DOI: 10.1021/ic401559b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Malcolm H. Chisholm
- Department
of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Kittisak Choojun
- Department
of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Albert S. Chow
- Department
of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Gideon Fraenkel
- Department
of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Judith C. Gallucci
- Department
of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
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Annibale VT, Tan R, Janetzko J, Lund LM, Song D. Palladium β-diiminate chemistry: Reactivity towards monodentate ligands and arylboronic acids. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.09.044] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Chisholm MH, Choojun K, Gallucci JC, Wambua PM. Chemistry of magnesium alkyls supported by 1,5,9-trimesityldipyrromethene and 2-[(2,6-diisopropylphenyl)amino]-4-[(2,6-diisopropylphenyl)imino]pent-2-ene. A comparative study. Chem Sci 2012. [DOI: 10.1039/c2sc21017g] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Peng KF, Chen CT. Synthesis, Structural Studies, and Catalytic Application of Palladium Complexes Containing Anilido-Oxazolinate Ligands. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100743] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Distaso M, Klupp Taylor RN, Taccardi N, Wasserscheid P, Peukert W. Influence of the counterion on the synthesis of ZnO mesocrystals under solvothermal conditions. Chemistry 2011; 17:2923-30. [PMID: 21294196 DOI: 10.1002/chem.201002235] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Indexed: 11/10/2022]
Abstract
Polymers and coordinating solvents have been shown to serve as templating agents to assist the precipitation of ZnO nanoparticles and address their morphology. In this work we show for the first time that a difference in the coordination strength between the polymer (poly-N-vinylpyrrolidone (PVP)) and the two Zn(II) precursor salts (nitrate and acetate) is able to promote or suppress the formation of mesocrystalline structures and even more importantly to tune their three-dimensional organization. On the basis of FTIR and (13)C NMR spectroscopic studies, we propose that not only the polymer (PVP) but also the solvent (DMF) play a key role as directing agents.
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Affiliation(s)
- Monica Distaso
- Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik, Cauerstrasse 4, 91058 Erlangen, Germany
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Zhou M, Gong T, Qiao X, Tong H, Guo J, Liu D. Magnesium(II) Complexes of 2,4-N,N′-Disubstituted 1,3,5-Triazapentadienyl Ligands: Synthesis and Characterization of [N(Dipp)C(NMe2)NC(NMe2)N(SiMe3)MgBr]2 and [N(R)C(R′)NC(R′)N(SiMe3)]2Mg (Dipp = 2,6-iPr2−C6H3, R = Ph, SiMe3; R′ = NMe2, 1-piperidino). Inorg Chem 2011; 50:1926-30. [DOI: 10.1021/ic102401w] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Meisu Zhou
- Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, People’s Republic of China,
| | - Tao Gong
- Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, People’s Republic of China,
| | - Xiaoli Qiao
- Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, People’s Republic of China,
| | - Hongbo Tong
- Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, People’s Republic of China,
| | - Jianping Guo
- Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, People’s Republic of China,
| | - Diansheng Liu
- Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, People’s Republic of China,
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Cross WB, Daly CG, Ackerman RL, George IR, Singh K. N-heterocyclic carbene tethered amido complexes of palladium and platinum. Dalton Trans 2011; 40:495-505. [DOI: 10.1039/c0dt01149e] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Synthesis and structures of the transition metal(II) β-diketiminates [ML2] (M=Mn, Fe, Ni, Cu, Pd), [] (M=Ni, Cu) and [M(η3-C3H5)L] (M=Ni, Pd); L or L′=[{N(SiMe3 or H)C(Ph)}2CH]. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2008.11.045] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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