1
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Mena A, Luna JR, MacGregor F, Landa EN, Metta-Magaña A, Lee WY, Fortier S. Photoinduced Cleavage of a Strained N-C Bond in an Iron Complex Supported by Super-Bulky Amidinate and Guanidinate Ligands. Inorg Chem 2024; 63:5351-5364. [PMID: 38481142 DOI: 10.1021/acs.inorgchem.3c03953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
The reaction of Fe2(mes)4 with the super-bulky amidines and guanidines HLAr*-R (LAr*-R = [(Ar*N)2C(R)]-, Ar* = 2,6-bis(diphenylmethyl)-4-tert-butylphenyl), R = Me (LAr*-Me), tBu (LAr*-tBu), Ph (LAr*-Ph), NiPr2 (LAr*-iPr2N), and Pip (LAr*-Pip)) gives access to the three-coordinate iron-mesityl complexes (LAr*-R)Fe(mes) only where LAr*-R = LAr*-Me, LAr*-Ph, or LAr*-Pip. Subsequent protonolysis with the N-atom transfer reagent Hdbabh (Hdbabh = 2,3:5,6-dibenzo-7-azabicyclo[2.2.1]hepta-2,5-diene) is limited in success, providing in one instance a few crystals of four-coordinate (LAr*-Me)Fe(dbabh)(Hdbabh), while three-coordinate (LAr*-Pip)Fe(dbabh) is synthesized reproducibly. Complexes (LAr*-Me)Fe(dbabh)(Hdbabh) and (LAr*-Pip)Fe(dbabh) are thermally insensitive in solution to temperatures of up to 100 °C. On the other hand, both (LAr*-Me)Fe(dbabh)(Hdbabh) and (LAr*-Pip)Fe(dbabh) show sensitivity to blue LED light (395 nm), undergoing photochemical transformations. For instance, the photolysis of (LAr*-Me)Fe(dbabh)(Hdbabh) leads to N-C bond scission and C-C bond coupling across the -dbabh moieties to give four-coordinate (LAr*-Me)Fe(N=dbabh-dbabhNH2). Photolyzing pyridine-d5 (py-d5) solutions of (LAr*-Pip)Fe(dbabh) at -5 °C produces a new paramagnetic photoproduct, [P]. Due to the thermal sensitivity of compound [P], it has eluded structural characterization; yet, Evans' method measurements suggest that the iron(II) oxidation state is maintained, thereby pointing to the -dbabh moiety as the locus of chemical change. In line with this assessment, addition of excess Me3SiCl to solutions of [P] produces the iron(II) complex (LAr*-Pip)FeCl(py-d5) as shown by 1H NMR spectroscopy. Gas chromatography/mass spectrometry analysis of the solutions of [P] shows a peak in the chromatogram with a molecular mass corresponding to a formulation of C14H11N that cannot be attributed to Hdbabh. This provides evidence for the photochemical-induced isomerization of the -dbabh ligand, revealing a heretofore unknown photochemical sensitivity of this N atom transfer reagent.
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Affiliation(s)
- Asiel Mena
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Juan R Luna
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Frank MacGregor
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Elizabeth Noriega Landa
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Alejandro Metta-Magaña
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Wen-Yee Lee
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Skye Fortier
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
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2
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Palomero OE, Jones RA. Hyperbulky 1,1’-dicarbodiimidoferrocene proligand promotes an asymmetric guanidinate coordination in a Zr(IV) complex. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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3
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Carrillo-Hermosilla F, Fernández-Galán R, Ramos A, Elorriaga D. Guanidinates as Alternative Ligands for Organometallic Complexes. Molecules 2022; 27:molecules27185962. [PMID: 36144698 PMCID: PMC9501388 DOI: 10.3390/molecules27185962] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/06/2022] [Accepted: 09/07/2022] [Indexed: 11/30/2022] Open
Abstract
For decades, ligands such as phosphanes or cyclopentadienyl ring derivatives have dominated Coordination and Organometallic Chemistry. At the same time, alternative compounds have emerged that could compete either for a more practical and accessible synthesis or for greater control of steric and electronic properties. Guanidines, nitrogen-rich compounds, appear as one such potential alternatives as ligands or proligands. In addition to occurring in a plethora of natural compounds, and thus in compounds of pharmacological use, guanidines allow a wide variety of coordination modes to different metal centers along the periodic table, with their monoanionic chelate derivatives being the most common. In this review, we focused on the organometallic chemistry of guanidinato compounds, discussing selected examples of coordination modes, reactivity and uses in catalysis or materials science. We believe that these amazing ligands offer a new promise in Organometallic Chemistry.
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4
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Kretsch J, Kreyenschmidt A, Schillmöller T, Lõkov M, Herbst‐Irmer R, Leito I, Stalke D. Bis(4-benzhydryl-benzoxazol-2-yl)methane - from a Bulky NacNac Alternative to a Trianion in Alkali Metal Complexes. Chemistry 2021; 27:9858-9865. [PMID: 34036637 PMCID: PMC8361911 DOI: 10.1002/chem.202100616] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Indexed: 11/25/2022]
Abstract
A novel sterically demanding bis(4-benzhydryl-benzoxazol-2-yl)methane ligand 6 (4-BzhH2 BoxCH2 ) was gained in a straightforward six-step synthesis. Starting from this ligand monomeric [M(4-BzhH2 BoxCH)] (M=Na (7), K (81 )) and dimeric [{M(4-BzhH2 BoxCH)}2 ] (M=K (82 ), Rb (9), Cs (10)) alkali metal complexes were synthesised by deprotonation. Abstraction of the potassium ion of 8 by reaction with 18-crown-6 resulted in the solvent separated ion pair [{(THF)2 K@(18-crown-6)}{bis(4-benzhydryl-benzoxazol-2-yl)methanide}] (11), including the energetically favoured monoanionic (E,E)-(4-BzhH2 BoxCH) ligand. Further reaction of 4-BzhH2 BoxCH2 with three equivalents KH and two equivalents 18-crown-6 yielded polymeric [{(THF)2 K@(18-crown-6)}{K@(18-crown-6)K(4-Bzh BoxCH)}]n (n→∞) (12) containing a trianionic ligand. The neutral ligand and herein reported alkali complexes were characterised by single X-ray analyses identifying the latter as a promising precursor for low-valent main group complexes.
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Affiliation(s)
- Johannes Kretsch
- Institut für Anorganische ChemieGeorg-August-Universität GöttingenTammannstraße 437077GöttingenGermany
| | | | - Timo Schillmöller
- Institut für Anorganische ChemieGeorg-August-Universität GöttingenTammannstraße 437077GöttingenGermany
| | - Märt Lõkov
- Institute of ChemistryUniversity of TartuRavila 14a50411TartuEstonia
| | - Regine Herbst‐Irmer
- Institut für Anorganische ChemieGeorg-August-Universität GöttingenTammannstraße 437077GöttingenGermany
| | - Ivo Leito
- Institute of ChemistryUniversity of TartuRavila 14a50411TartuEstonia
| | - Dietmar Stalke
- Institut für Anorganische ChemieGeorg-August-Universität GöttingenTammannstraße 437077GöttingenGermany
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5
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Peddarao T, Baishya A, Sarkar N, Acharya R, Nembenna S. Conjugated Bis‐Guanidines (CBGs) as
β
‐Diketimine Analogues: Synthesis, Characterization of CBGs/Their Lithium Salts and CBG Li Catalyzed Addition of B−H and TMSCN to Carbonyls. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100141] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Thota Peddarao
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Homi Bhabha National Institute (HBNI) Bhubaneswar 752050 India
| | - Ashim Baishya
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Homi Bhabha National Institute (HBNI) Bhubaneswar 752050 India
| | - Nabin Sarkar
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Homi Bhabha National Institute (HBNI) Bhubaneswar 752050 India
| | - Rudresh Acharya
- School of Biological Sciences National Institute of Science Education and Research (NISER) Homi Bhabha National Institute (HBNI) Bhubaneswar 752050 India
| | - Sharanappa Nembenna
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Homi Bhabha National Institute (HBNI) Bhubaneswar 752050 India
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6
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Moskalev MV, Razborov DA, Skatova AA, Bazanov AA, Fedushkin IL. Alkali Metal Reduction of 1,2‐Bis[(2,6‐dibenzhydryl‐4‐methylphenyl)imino]acenaphthene (Ar
BIG
‐bian) to Radical‐Anion. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202000909] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Mikhail V. Moskalev
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences Tropinina Str. 49 603137 Nizhny Novgorod Russian Federation
| | - Danila A. Razborov
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences Tropinina Str. 49 603137 Nizhny Novgorod Russian Federation
| | - Alexandra A. Skatova
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences Tropinina Str. 49 603137 Nizhny Novgorod Russian Federation
| | - Andrey A. Bazanov
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences Tropinina Str. 49 603137 Nizhny Novgorod Russian Federation
| | - Igor L. Fedushkin
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences Tropinina Str. 49 603137 Nizhny Novgorod Russian Federation
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7
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Aguirre Quintana LM, Jiang N, Bacsa J, La Pierre HS. Homoleptic cerium tris(dialkylamido)imidophosphorane guanidinate complexes. Dalton Trans 2020; 49:14908-14913. [PMID: 33078808 DOI: 10.1039/d0dt03472j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We report the synthesis of a new potassium tris(piperdino)imidophosphorane N,N'-dicyclohexylguanidinate, K[CyGNP(pip)3], and describe the synthesis and characterization of the tris-homoleptic compounds, [Ce(CyGNP(pip)3)3], 1-Ce, and [Ce(CyGNP(pip)3)3][BPh4], 2-Ce. The latter is an unusual cationic tetravalent cerium complex. Cyclic voltammetry studies of 1-Ce and 2-Ce revealed Epc potentials of -1.56 V and -1.81 V, and Epa potentials of -0.78 V and -0.66 V (200 mV s-1; THF, vs. Fc0/+), respectively. Compounds 1-Ce and 2-Ce were studied by L3-edge X-ray absorption near-edge spectroscopy (XANES), and the fit of the spectrum of 2-Ce revealed a white-line multiplet with an nf value of 0.50(2).
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Affiliation(s)
- Luis M Aguirre Quintana
- Department of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA.
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8
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Zhao Y, Guo X, Si Z, Hu Y, Sun Y, Liu Y, Ji Z, You J. Hydrosilane-Assisted Synthesis of Urea Derivatives from CO 2 and Amines. J Org Chem 2020; 85:13347-13353. [PMID: 32997938 DOI: 10.1021/acs.joc.0c02032] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A methodology employing CO2, amines, and phenylsilane was discussed to access aryl- or alkyl-substituted urea derivatives. This procedure was characterized by adopting hydrosilane to promote the formation of ureas directly, without the need to prepare silylamines in advance. Control reactions suggested that FeCl3 was a favorable additive for the generation of ureas, and this 1,5,7-triazabicyclo[4.4.0]dec-5-ene-catalyzed reaction might proceed through nucleophilic addition, silicon migration, and the subsequent formal substitution of silylcarbamate.
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Affiliation(s)
- Yulei Zhao
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Xuqiang Guo
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Zhiyao Si
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Yanan Hu
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Ying Sun
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Yunlin Liu
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
| | - Zhongyin Ji
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Jinmao You
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China.,Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining 810001, China
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9
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Bakewell C. Magnesium hydrides bearing sterically demanding amidinate ligands: synthesis, reactivity and catalytic application. Dalton Trans 2020; 49:11354-11360. [PMID: 32766619 DOI: 10.1039/d0dt02523b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The synthesis and characterisation of a series of magnesium complexes bearing sterically demanding amidinate ligands is reported; this includes magneisum amides (1a and 1b), hydrides (3a and 3b) and alkyl complexes (2b). The solid and solution state behaviour of the complexes has been investigated using single crystal X-ray diffraction and NMR spectroscopy, revealing the magnesium hydrides to exist as dimers in the solid state, dispite the sterically demanding ligand systems and showing a degree of monomeric character in solution. The stoichiometric and catalytic activity of the amidinate complexes were investigated, with the complexes found to efficiently mediate both the hydroamination of N,N'-diisopropylcarbodiimide and the Tishchenko reaction. The metal hydrides are highly reactive towards coordinating substrates, showing a significant increase in catalytic rate compared with more ubiquitous β-diketiminate magnesium hydrides.
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Affiliation(s)
- Clare Bakewell
- University College London, Department of Chemistry, 20 Gordon Street, London WC1H 0AJ, UK.
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10
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Chlupatý T, Nevoralová J, Růžičková Z, Růžička A. Lithium and Dilithium Guanidinates, a Starter Kit for Metal Complexes Containing Various Mono- and Dianionic Ligands. Inorg Chem 2020; 59:10854-10865. [PMID: 32650639 DOI: 10.1021/acs.inorgchem.0c01362] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Comparative studies of the synthesis of lithium guanidinates via nucleophilic addition of lithium amides to carbodiimides were performed. Four combinations of small or sterically crowded carbodiimide and sterically crowded lithium amide or lithium amide containing an adjacent amino donor group give ten different types of complexes. In particular, 2,6-[(CH3)2CH]2C6H3NHLi (DipNHLi, 1) reacts with (CH3)2CHN═C═NCH(CH3)2 upon the formation of the dissymmetric dimeric complex 2 with four-coordinate Li atoms. In contrast, 1 with DipN═C═NDip gives the mononuclear lithium guanidinate 3 with two-coordinate lithium by κ1-guanidinate, solvent molecule, and additional interaction with a π-electron cloud of one of the Dip groups. Analogous reactions of 2-[(CH3)2NCH2]C6H4NHLi (7) yield complexes 8 and 9, where the adjacent amino donors are always coordinated. Further deprotonation of 2, 3, 8, and 9 leads to dilithium guanidinates(2-)-4, 5, 10, and 11, among which only 5, containing three Dip groups, is monomeric with contacts to two π-electron systems of Dip groups. The rest of the complexes are tetranuclear with different structural patterns. In the central parts of molecules, toward which the nitrogen atoms of the guanidinates are oriented, lithium atoms are usually pseudotetrahedral, but trigonal in peripheral parts. Adjacent solvent molecules, chelating amino groups, and π-electron systems of Dip groups are coordinated in order to complete coordination polyhedra. Complexes 4 and 5 deoligomerize in solution upon the formation of fluxional monomeric dilithium species. Conversely, 11 is a dimer in solution due to the strong donation of an amino group. The silylated lithium amide {2-[(CH3)2NCH2]C6H4}[(Si(CH3)3]NLi (12) reacts with both carbodiimides to give dinuclear 13 obtained from diisopropylcarbodiimide and monomeric 14 from the second carbodiimide. Complexes 13 and 14 structurally resemble 8 and 9, with the highest degree of the localization of π-electron density within the N3C guanidinate system, η3-contact to the Dip ring, and a lack of the solvent molecule in 14.
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Affiliation(s)
- Tomáš Chlupatý
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Jana Nevoralová
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
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11
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12
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Gyton MR, Leverett AR, Cole ML, McKay AI. Bulky bis(aryl)triazenides: just aspiring amidinates? A structural and spectroscopic study. Dalton Trans 2020; 49:5653-5661. [DOI: 10.1039/d0dt00285b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The triazenide ligand is compared to the isoelectronic formamidinate with regards donor capacity, coordination chemistry and capacity to stabilise reactive main group species.
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Affiliation(s)
- Matthew R. Gyton
- School of Chemistry
- University of New South Wales
- Kensington
- Australia
| | | | - Marcus L. Cole
- School of Chemistry
- University of New South Wales
- Kensington
- Australia
| | - Alasdair I. McKay
- School of Chemistry
- University of New South Wales
- Kensington
- Australia
- School of Chemistry
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13
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Jacintomoreno A, Sharma HK, Metta-Magaña A, Pannell KH. Aminomethyl Transfer (Mannich) Reactions Between an O-Triethylsilylated Hemiaminal and Anilines, R n C 6 H 5-n NH 2 Leading to New Diamines, Triamines, Imines, or 1,3,5-Triazines Dependent upon Substituent R. Chemistry 2019; 25:11302-11307. [PMID: 31194896 DOI: 10.1002/chem.201901877] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Indexed: 11/11/2022]
Abstract
The reactions of the Mannich reagent Et3 SiOCH2 NMe2 (1) with a variety of anilines (mono-substituted RC6 H4 NH2 , R=H, 4-CN, 4-NO2 , 4-Ph, 4-Me, 4-MeO, 4-Me2 N; di-substituted R2 C6 H3 NH2 , R2 =3,5-(CH3 )2 , 3,5-(CF3 )2 ; tri-substituted R3 C6 H2 NH2 , R3 =3,5-Me2 -4-Br and a "super bulky" aniline (Ar*NH2 ) [Ar*=2,6-bis(diphenylmethyl)-4-tert-butylphenyl]) led to the formation of a range of products dependent upon the substituent. With electron-withdrawing substituents, previously unknown diamines, RC6 H4 NH(CH2 NMe2 ) [R=CN (2 a), NO2 (2 b)] and R2 C6 H3 NH(CH2 NMe2 ) [R2 =3,5-(CF3 )2 (2 c)] were formed. Further reaction of 2 a, b, c with 1 yielded the corresponding triamines RC6 H4 N(CH2 NMe2 )2 (R=CN (3 a), NO2 (3 b) and R2 C6 H3 N(CH2 NMe2 )2 , R2 =3,5-(CF3 )2 (3 c). The new polyamines were characterized by NMR spectroscopy, and for 2 a, 2 c, and 3 c, by single crystal XRD. In the case of electron-donating groups, R=4-OMe, 4-NMe2 , 4-Me, 3,5-Me2 , 3,5-Me2 -4-Br, and for R=4-Ph, the reactions with 1 immediately led to the formation of the related 1,3,5-triazines, R=4-MeO (5 a), 4-Me2 N (5 b), 4-Me (5 c), 3,5-Me2 (5 d), 3,5-Me2 -4-Br (5 e), 4-Ph (5 f), 4-Cl (5 g). The "super bulky" aniline rapidly produced a single product, namely the corresponding imine Ar*N=CH2 (4) which was also characterized by single crystal XRD. Imine 4 is both thermally and oxidatively stable. All reactions are very fast, thus based upon the presence of Si we are tempted to denote the reactions of 1 as examples of "Silick" chemistry.
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Affiliation(s)
- Anwar Jacintomoreno
- Department of Chemistry, University of Texas at El Paso, El Paso, TX., 79968-0513, USA
| | - Hemant K Sharma
- Department of Chemistry, University of Texas at El Paso, El Paso, TX., 79968-0513, USA
| | | | - Keith H Pannell
- Department of Chemistry, University of Texas at El Paso, El Paso, TX., 79968-0513, USA
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14
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Palomero OE, Jones RA. 1,1′-Dicarbodiimidoferrocenes: Synthesis, Characterization, and Group IV 1,1′-Bisguanidinateferrocene Complexes. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00336] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Orhi Esarte Palomero
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Richard A. Jones
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States
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15
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Gyton MR, Bhadbhade M, Cole ML. A Flexible, Extremely Sterically Demanding Triazenide Ligand: Synthesis and Coordination Chemistry. Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201900050] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Matthew R. Gyton
- School of Chemistry The University of New South Wales Sydney NSW Australia
- Current address: Department of Chemistry University of Warwick Gibbet Hill Road CV4 7AL Coventry United Kingdom
| | - Mohan Bhadbhade
- Mark Wainwright Analytical Centre The University of New South Wales Sydney NSW Australia
| | - Marcus L. Cole
- School of Chemistry The University of New South Wales Sydney NSW Australia
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16
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Preusser S, Kalden D, Bevern D, Oberheide A, Görls H, Imhof W, Westerhausen M, Krieck S. Potassium Salts of Asymmetrically Substituted Amidinates and a Triazenide. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900159] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Silvio Preusser
- Institute of Inorganic and Analytical Chemistry Friedrich Schiller University Jena Humboldtstraße 8 07743 Jena Germany
| | - Diana Kalden
- Institute of Inorganic and Analytical Chemistry Friedrich Schiller University Jena Humboldtstraße 8 07743 Jena Germany
| | - Damian Bevern
- Institute of Inorganic and Analytical Chemistry Friedrich Schiller University Jena Humboldtstraße 8 07743 Jena Germany
| | - Ansgar Oberheide
- Institute of Inorganic and Analytical Chemistry Friedrich Schiller University Jena Humboldtstraße 8 07743 Jena Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry Friedrich Schiller University Jena Humboldtstraße 8 07743 Jena Germany
| | - Wolfgang Imhof
- Institute for Integrated Natural Sciences University Koblenz‐Landau Universitätsstraße 1 56070 Koblenz Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry Friedrich Schiller University Jena Humboldtstraße 8 07743 Jena Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry Friedrich Schiller University Jena Humboldtstraße 8 07743 Jena Germany
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17
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Xu M, Jupp AR, Ong MSE, Burton KI, Chitnis SS, Stephan DW. Synthesis of Urea Derivatives from CO
2
and Silylamines. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900058] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Maotong Xu
- Department of ChemistryUniversity of Toronto 80 St. George St. Toronto Ontario M5S3H6 Canada
| | - Andrew R. Jupp
- Department of ChemistryUniversity of Toronto 80 St. George St. Toronto Ontario M5S3H6 Canada
| | - Maegan S. E. Ong
- Department of ChemistryUniversity of Toronto 80 St. George St. Toronto Ontario M5S3H6 Canada
| | - Katherine I. Burton
- Department of ChemistryUniversity of Toronto 80 St. George St. Toronto Ontario M5S3H6 Canada
| | - Saurabh S. Chitnis
- Department of ChemistryUniversity of Toronto 80 St. George St. Toronto Ontario M5S3H6 Canada
| | - Douglas W. Stephan
- Department of ChemistryUniversity of Toronto 80 St. George St. Toronto Ontario M5S3H6 Canada
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18
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Synthesis of Urea Derivatives from CO
2
and Silylamines. Angew Chem Int Ed Engl 2019; 58:5707-5711. [DOI: 10.1002/anie.201900058] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Indexed: 12/14/2022]
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19
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Kalden D, Görls H, Westerhausen M, Krieck S. Hexanuclear Wheel-Shaped Lithium N-(2,6-Diisopropylphenyl)- N′-(2-pyridylethyl)benzamidinate. Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201800518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Diana Kalden
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstraße 8 07743 Jena Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstraße 8 07743 Jena Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstraße 8 07743 Jena Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstraße 8 07743 Jena Germany
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20
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Bresien J, Goicoechea JM, Hinz A, Scharnhölz MT, Schulz A, Suhrbier T, Villinger A. Increasing steric demand through flexible bulk - primary phosphanes with 2,6-bis(benzhydryl)phenyl backbones. Dalton Trans 2019; 48:3786-3794. [PMID: 30815640 DOI: 10.1039/c9dt00399a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Sterically demanding primary phosphanes of the type RBhp-PH2 (Bhp = 2,6-bis(benzhydryl)-4-R-phenyl; R = Me, tBu) could be prepared in high yields by modification of synthetic protocols of established bulky phosphanes. The Bhp substituents simultaneously exhibit extensive steric expansiveness and high degrees of flexibility compared to other 2,6-substituted phenyl backbones, enabling a range of different-sized atoms and functionalities to be located between the flanking benzhydryl moieties. Therefore, it was also possible to isolate and fully characterize several halogenated precursors, a diazonium intermediate, as well as a dihalostibane.
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Affiliation(s)
- Jonas Bresien
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059 Rostock, Germany.
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21
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Leverett AR, Diachenko V, Cole ML, McKay AI. Kinetic stabilization of low-oxidation state and terminal hydrido main group metal complexes by a sterically demanding N,N′-bis(2,6-terphenyl)triazenide. Dalton Trans 2019; 48:13197-13204. [DOI: 10.1039/c9dt02562f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thermally robust main group metal complexes featuring terminal hydride ligands are achieved by deploying a sterically demanding N,N′-bis(2,6-terphenyl)triazenide ligand.
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Affiliation(s)
| | - Vera Diachenko
- School of Chemistry
- University of New South Wales
- Australia
| | - Marcus L. Cole
- School of Chemistry
- University of New South Wales
- Australia
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22
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McKay AI, Cole ML. Structural diversity in a homologous series of donor free alkali metal complexes bearing a sterically demanding triazenide. Dalton Trans 2019; 48:2948-2952. [DOI: 10.1039/c8dt04983a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The isolation and structural characterization of donor free alkali metal complexes of a bis(terphenyl) substituted triazenide are presented.
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Affiliation(s)
| | - Marcus L. Cole
- School of Chemistry
- University of New South Wales
- Australia
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23
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Wong GF, Yeung LF, Tsoi HY, Chan H, Chiang M, Lee HK. A Mononuclear Iron(II) Bis(guanidinate) Complex: Synthesis, Structure, and Reactivity. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- George Fai Wong
- Department of Chemistry The Chinese University of Hong Kong Shatin New Territories Hong Kong
| | - Lai Fong Yeung
- Department of Chemistry The Chinese University of Hong Kong Shatin New Territories Hong Kong
| | - Ho Yin Tsoi
- Department of Chemistry The Chinese University of Hong Kong Shatin New Territories Hong Kong
| | - Hoi‐Shan Chan
- Department of Chemistry The Chinese University of Hong Kong Shatin New Territories Hong Kong
| | - Ming‐Hsi Chiang
- Institute of Chemistry Academia Sinica 128 Academia Road Sec. 2, Nankang 115 Taipei Taiwan
| | - Hung Kay Lee
- Department of Chemistry The Chinese University of Hong Kong Shatin New Territories Hong Kong
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24
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O’Brien AG, Ricci EM, Journet M. Dehydration of an Insoluble Urea Byproduct Enables the Condensation of DCC and Malonic Acid in Flow. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.7b00375] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Alexander G. O’Brien
- GlaxoSmithKline, 709 Swedeland Road, King of Prussia, Pennsylvania 19406, United States
| | - Eric M. Ricci
- GlaxoSmithKline, 709 Swedeland Road, King of Prussia, Pennsylvania 19406, United States
| | - Michel Journet
- GlaxoSmithKline, 709 Swedeland Road, King of Prussia, Pennsylvania 19406, United States
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25
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Qiao Y, Sergentu DC, Yin H, Zabula AV, Cheisson T, McSkimming A, Manor BC, Carroll PJ, Anna JM, Autschbach J, Schelter EJ. Understanding and Controlling the Emission Brightness and Color of Molecular Cerium Luminophores. J Am Chem Soc 2018; 140:4588-4595. [DOI: 10.1021/jacs.7b13339] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yusen Qiao
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Dumitru-Claudiu Sergentu
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - Haolin Yin
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Alexander V. Zabula
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Alex McSkimming
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Brian C. Manor
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Jessica M. Anna
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
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26
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de Bruin-Dickason CN, Sutcliffe T, Alvarez Lamsfus C, Deacon GB, Maron L, Jones C. Kinetic stabilisation of a molecular strontium hydride complex using an extremely bulky amidinate ligand. Chem Commun (Camb) 2018; 54:786-789. [DOI: 10.1039/c7cc09362d] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first dimeric strontium hydride complex (see picture, Dip = 2,6-diisopropylphenyl, Ad = 1-adamantyl), and analogous magnesium hydride systems, have been kinetically stabilised by extremely bulky amidinate ligands, developed for this study.
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Affiliation(s)
| | | | | | | | - Laurent Maron
- Université de Toulouse et CNRS, INSA, UPS, UMR 5215, LPCNO
- F-31077 Toulouse
- France
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27
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Schwamm RJ, Lein M, Coles MP, Fitchett CM. Bismuth(III) Complex of the [S4]•– Radical Anion: Dimer Formation via Pancake Bonds. J Am Chem Soc 2017; 139:16490-16493. [DOI: 10.1021/jacs.7b10454] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Ryan J. Schwamm
- School
of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand
| | - Matthias Lein
- School
of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand
| | - Martyn P. Coles
- School
of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand
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28
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Maity AK, Murillo J, Metta-Magaña AJ, Pinter B, Fortier S. A Terminal Iron(IV) Nitride Supported by a Super Bulky Guanidinate Ligand and Examination of Its Electronic Structure and Reactivity. J Am Chem Soc 2017; 139:15691-15700. [PMID: 28953380 DOI: 10.1021/jacs.7b06919] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Utilizing the bulky guanidinate ligand [LAr*]- (LAr* = (Ar*N)2C(R), Ar* = 2,6-bis(diphenylmethyl)-4-tert-butylphenyl, R = NCtBu2) for kinetic stabilization, the synthesis of a rare terminal Fe(IV) nitride complex is reported. UV irradiation of a pyridine solution of the Fe(II) azide [LAr*]FeN3(py) (3-py) at 0 °C cleanly generates the Fe(IV) nitride [LAr*]FeN(py) (1). The 15N NMR spectrum of the 115N (50% Fe≡15N) isotopomer shows a resonance at 1016 ppm (vs externally referenced CH3NO2 at 380 ppm), comparable to that known for other terminal iron nitrides. Notably, the computed structure of 1 reveals an iron center with distorted tetrahedral geometry, τ4 = 0.72, featuring a short Fe≡N bond (1.52 Å). Inspection of the frontier orbital ordering of 1 shows a relatively small HOMO/LUMO gap with the LUMO comprised by Fe(dxz,yz)N(px,y) π*-orbitals, a splitting that is manifested in the electronic absorption spectrum of 1 (λ = 610 nm, ε = 1375 L·mol-1·cm-1; λ = 613 nm (calcd)). Complex 1 persists in low-temperature solutions of pyridine but becomes unstable at room temperature, gradually converting to the Fe(II) hydrazide product [κ2-(tBu2CN)C(η6-NAr*)(N-NAr*)]Fe (4) upon standing via intramolecular N-atom insertion. This reactivity of the Fe≡N moiety was assessed through molecular orbital analysis, which suggests electrophilic character at the nitride functionality. Accordingly, treatment of 1 with the nucleophiles PMe2Ph and Ar-N≡C (Ar = 2,6-dimethylphenyl) leads to partial N-atom transfer and formation of the Fe(II) addition products [LAr*]Fe(N═PMe2Ph)(py) (5) and [LAr*]Fe(N═C═NAr)(py) (6). Similarly, 1 reacts with PhSiH3 to give [LAr*]Fe[N(H)(SiH2Ph)](py) (7) which Fukui analysis shows to proceed via electrophilic insertion of the nitride into the Si-H bond.
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Affiliation(s)
- Arnab K Maity
- Department of Chemistry, University of Texas at El Paso , El Paso, Texas 79968, United States
| | - Jesse Murillo
- Department of Chemistry, University of Texas at El Paso , El Paso, Texas 79968, United States
| | | | - Balazs Pinter
- Computational OrganoMetallic and Inorganic Chemistry Group, Eenheid Algemene Chemie, Vrije Universiteit Brussel , Pleinlaan 2, Brussels 1050, Belgium
| | - Skye Fortier
- Department of Chemistry, University of Texas at El Paso , El Paso, Texas 79968, United States
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29
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Lee CL, Lin YF, Jiang MT, Lu WY, Vandavasi JK, Wang LF, Lai YC, Chiang MY, Chen HY. Improvement in Aluminum Complexes Bearing Schiff Bases in Ring-Opening Polymerization of ε-Caprolactone: A Five-Membered-Ring System. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00068] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Chieh-Ling Lee
- Department
of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
| | - Ya-Fan Lin
- Department
of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
- Department
of Fragrance and Cosmetic Science, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
| | - Man-Ting Jiang
- Department
of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
| | - Wei-Yi Lu
- Department
of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
| | | | - Li-Fang Wang
- Department
of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
| | - Yi-Chun Lai
- Department
of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
| | - Michael Y. Chiang
- Department
of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
- Department
of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, Republic of China
| | - Hsuan-Ying Chen
- Department
of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
- Department
of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan, Republic of China
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30
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Castillo M, Barreda O, Maity AK, Barraza B, Lu J, Metta-Magaña AJ, Fortier S. Advances in Guanidine Ligand Design: Synthesis of a Strongly Electron-Donating, Imidazolin-2-iminato Functionalized Guanidinate and its Properties on Iron. J COORD CHEM 2016; 69:2003-2014. [PMID: 28216799 PMCID: PMC5312970 DOI: 10.1080/00958972.2016.1167198] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 02/18/2016] [Indexed: 10/22/2022]
Abstract
Imidazolin-2-imines (ImRN-), derived from N-heterocylic carbenes, have been shown to be strong electron donors when directly coordinated to metals or when used as a substituent in larger ligand frameworks. In an attempt to enhance the electron-donating properties of the popular guanidine ligand class, the effect of appending an ImRN- backbone onto a guanidinate scaffold was investigated. Addition of 1 equiv of [Li(Et2O)][Im tBuN] to the aryl carbodiimide (dippN)2C (dipp = 2,6-diisopropylphenyl) cleanly affords the lithium Im tBuN-functionalized guanidinate [Li(THF)2][(Im tBuN)C(Ndipp)2] (1). Subsequent metalation of the ligand with FeBr2 gives the yellow Fe(II) complex {[(Im tBuN)C(Ndipp)2]FeBr}2 (4) in good yield. Solid-state structural analyses of both 1 and 4 shows the Im tBuN- group acts as a non-coordinating backbone substituent. Direct structural comparison of 4 to the closely related guanidinate and ketimine-guanidinate complexes {[(X)C(Ndipp)2]FeBr}2 (X = t Bu2C=N (5); N( i Pr)2 (6)), differing only in their backbone, reveals a detectable resonance contribution of the Im tBuN- group to the guanidinate ligand electronic structure. Moreover, the Fe(II)/Fe(III) redox couple of 4 (E1/2 = -0.67 V) is cathodically shifted by greater than 200 mV from the oxidation potentials of 5 (E1/2 = -0.42 V) and 6 (E1/2 = -0.45 V), demonstrating the [(Im tBuN)C(Ndipp)2]- system to be a quantifiably superior electron donor.
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Affiliation(s)
| | - Omar Barreda
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
| | - Arnab K. Maity
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
| | - Brian Barraza
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
| | - Jeffrey Lu
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106
| | | | - Skye Fortier
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
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31
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Peddarao T, Baishya A, Barman MK, Kumar A, Nembenna S. Metal-free access of bulky N,N′-diarylcarbodiimides and their reduction: bulky N,N′-diarylformamidines. NEW J CHEM 2016. [DOI: 10.1039/c6nj00907g] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile synthetic protocol for the preparation of N,N′-diarylcarbodiimides and their reduction with sodium borohydride in ethanol to obtain N,N′-diarylformamidines has been demonstrated.
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Affiliation(s)
- Thota Peddarao
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- Bhubaneswar
- India
| | - Ashim Baishya
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- Bhubaneswar
- India
| | - Milan Kr. Barman
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- Bhubaneswar
- India
| | - Ajay Kumar
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- Bhubaneswar
- India
| | - Sharanappa Nembenna
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- Bhubaneswar
- India
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32
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Maity AK, Metta-Magaña AJ, Fortier S. Donor Properties of a New Class of Guanidinate Ligands Possessing Ketimine Backbones: A Comparative Study Using Iron. Inorg Chem 2015; 54:10030-41. [DOI: 10.1021/acs.inorgchem.5b01815] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arnab K. Maity
- Department of Chemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | | | - Skye Fortier
- Department of Chemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
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33
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Boreen MA, Bogart JA, Carroll PJ, Schelter EJ. Rearrangement in a Tripodal Nitroxide Ligand To Modulate the Reactivity of a Ti–F Bond. Inorg Chem 2015; 54:9588-93. [DOI: 10.1021/acs.inorgchem.5b01687] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael A. Boreen
- P. Roy
and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Justin A. Bogart
- P. Roy
and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- P. Roy
and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Eric J. Schelter
- P. Roy
and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
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34
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Bulky guanidinate stabilized homoleptic magnesium, calcium and zinc complexes and their catalytic activity in the Tishchenko reaction. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.02.044] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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