1
|
Rumyantsev AV, Bushkov NS, Ryzhikova MA, Zhizhin AA, Takazova RU, Talanova VN, Gutsul EI, Novikov RA, Zhizhko PA, Zarubin DN. Readily available Ti-based in situ catalytic system for oxo/imido heterometathesis. Dalton Trans 2024; 53:4976-4983. [PMID: 38393646 DOI: 10.1039/d3dt04388f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
We investigate Ti(NEt2)4 supported on silica dehydroxylated at 700 °C as an easily accessible pre-catalyst for oxo/imido heterometathesis reactions. Being activated with TolNH2, the supported Ti amide (SiO)Ti(NEt2)3 (1) demonstrates catalytic activity in the imidation of ketones with N-sulfinylamines comparable with the most active previously described well-defined imido catalyst (SiO)Ti(NtBu)(Me2Pyr)(py)2 (2) (Me2Pyr = 2,5-dimethylpyrrolyl), which implies the in situ formation of surface imido species in this system. The materials obtained via treatment of 1 with anilines (TolNH2 (1a) and p-MeOC6H415NH2 (1b)) were studied with IR, EA and 1H, 13C, 15N and 2D solid-state NMR, although the proposed imido intermediate has not been detected, pointing towards tris-amides (SiO)Ti(NHC6H4X)3 (X = Me, OMe) being the major surface species in the isolated materials 1a and 1b. The system 1/TolNH2 was tested in a range of imidation reactions and demonstrated excellent performance for express high-yielding preparation of ketimines, formamidines, lactone imidates and sulfurdiimines, making it a convenient alternative to the well-defined supported Ti imido catalysts.
Collapse
Affiliation(s)
- Andrey V Rumyantsev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334 Moscow, Russia.
- Department of Chemistry, Moscow State University, Vorob'evy Gory, 1, 119992 Moscow, Russia
| | - Nikolai S Bushkov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334 Moscow, Russia.
| | - Margarita A Ryzhikova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334 Moscow, Russia.
- Higher Chemical College, D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, 125047 Moscow, Russia
| | - Anton A Zhizhin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334 Moscow, Russia.
| | - Rina U Takazova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334 Moscow, Russia.
| | - Valeria N Talanova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334 Moscow, Russia.
| | - Evgenii I Gutsul
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334 Moscow, Russia.
| | - Roman A Novikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp., 47, 119991 Moscow, Russia
| | - Pavel A Zhizhko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334 Moscow, Russia.
| | - Dmitry N Zarubin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334 Moscow, Russia.
| |
Collapse
|
2
|
Abstract
Complexes with aromaticity in both the lowest singlet state (S0) and the lowest triplet state (T1) (denoted as adaptive aromaticity) are rare because according to Hückel's and Baird's rules, a species could be aromatic in either the S0 or T1 state in most cases. Thus, it is particularly challenging to design species with adaptive aromaticity. Previous reports on adaptive aromaticity were mainly focused on 16e metallapentalenes. Here, we demonstrate that 18e metallapentalenes could possess adaptive aromaticity supported by a set of aromaticity indices when the nitrido and imido ligands are introduced via density functional theory calculations. Further investigation suggests that the metal-carbon bond strength plays an important role in the S0 state aromaticity and the T1 state aromaticity could be attributed to spin electron localization. All these findings could be useful for the development of metallaaromatic chemistry.
Collapse
Affiliation(s)
- Qingfu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Yifei Fang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Jun Zhu
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| |
Collapse
|
3
|
Mohar JS, Reinholdt A, Keller TM, Carroll PJ, Telser J, Mindiola DJ. A mononuclear, terminal titanium(III) imido. Chem Commun (Camb) 2023; 59:10101-10104. [PMID: 37417771 PMCID: PMC10777895 DOI: 10.1039/d3cc01758c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
We report the first mononuclear TiIII complex possessing a terminal imido ligand. Complex [TptBu,MeTi{NSi(CH3)3}(THF)] (2) (TptBu,Me = hydridotris(3-tert-butyl-5-methylpyrazol-1-yl)borate) is prepared by reduction of [TptBu,MeTi{NSi(CH3)3}(Cl)] (1) with KC8 in high yield. The connectivity and metalloradical nature of 2 were confirmed by single crystal X-ray diffraction studies, Q- and X-band EPR, UV-Vis and 1H NMR spectroscopies. The d1 complex [(TptBu,Me)TiCl(OEt2)][B(C6F5)4] (3), was prepared to spectroscopically compare it to 2. Electrochemical studies of 1 and 2 reveal a reversible 1e- process, and chemical oxidants ClCPh3 or 1/2 eq. XeF2 react cleanly with 2 yielding 1 or the fluoride derivative [TptBu,MeTi{NSi(CH3)3}(F)] (4), respectively.
Collapse
Affiliation(s)
- Jacob S Mohar
- Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania, USA.
| | - Anders Reinholdt
- Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania, USA.
| | - Taylor M Keller
- Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania, USA.
| | - Patrick J Carroll
- Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania, USA.
| | - Joshua Telser
- Department of Biological, Physical and Health Sciences, Roosevelt University, Chicago, Illinois, USA.
| | - Daniel J Mindiola
- Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania, USA.
| |
Collapse
|
4
|
Heilmann A, Vasko P, Hicks J, Goicoechea JM, Aldridge S. An Aluminium Imide as a Transfer Agent for the [NR] 2- Function via Metathesis Chemistry. Chemistry 2023; 29:e202300018. [PMID: 36602941 DOI: 10.1002/chem.202300018] [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: 01/03/2023] [Revised: 01/05/2023] [Accepted: 01/05/2023] [Indexed: 01/06/2023]
Abstract
The reactions of a terminal aluminium imide with a range of oxygen-containing substrates have been probed with a view to developing its use as a novel main group transfer agent for the [NR]2- fragment. We demonstrate transfer of the imide moiety to [N2 ], [CO] and [Ph(H)C] units driven thermodynamically by Al-O bond formation. N2 O reacts rapidly to generate the organoazide DippN3 (Dipp=2,6-i Pr2 C6 H3 ), while CO2 (under dilute reaction conditions) yields the corresponding isocyanate, DippNCO. Mechanistic studies, using both experimental and quantum chemical techniques, identify a carbamate complex K2 [(NON)Al-{κ2 -(N,O)-N(Dipp)CO2 }]2 (formed via [2+2] cycloaddition) as an intermediate in the formation of DippNCO, and also in an alternative reaction leading to the generation of the amino-dicarboxylate complex K2 [(NON)Al{κ2 -(O,O')-(O2 C)2 N-(Dipp)}] (via the take-up of a second equivalent of CO2 ). In the case of benzaldehyde, a similar [2+2] cycloaddition process generates the metallacyclic hemi-aminal complex, Kn [(NON)Al{κ2 -(N,O)-(N(Dipp)C(Ph)(H)O}]n . Extrusion of the imine, PhC(H)NDipp, via cyclo-reversion is disfavoured thermally, due to the high energy of the putative aluminium oxide co-product, K2 [(NON)Al(O)]2 . However, addition of CO2 allows the imine to be released, driven by the formation of the thermodynamically more stable aluminium carbonate co-product, K2 [(NON)Al(κ2 -(O,O')-CO3 )]2 .
Collapse
Affiliation(s)
- Andreas Heilmann
- Inorganic Chemistry Laboratory Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Petra Vasko
- Department of Chemistry, University of Helsinki, A. I. Virtasen Aukio 1, PO Box 55, 00014, Helsinki, Finland
| | - Jamie Hicks
- Inorganic Chemistry Laboratory Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Jose M Goicoechea
- Inorganic Chemistry Laboratory Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Simon Aldridge
- Inorganic Chemistry Laboratory Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| |
Collapse
|
5
|
Pichugov AV, Bushkov NS, Rumyantsev AV, Zhizhin AA, Aleshin DY, Strelkova TV, Talanova VN, Takazova RU, Mance D, Allouche F, Mougel V, Dolgushin FM, Ustynyuk NA, Zhizhko PA, Zarubin DN. Design of 4‐Coordinate Ti Imido Aryloxide on the Surface of Silica for Catalytic Oxo/Imido Heterometathesis. Helv Chim Acta 2022. [DOI: 10.1002/hlca.202200030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Andrey V. Pichugov
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Laboratory of Organometallic Compounds RUSSIAN FEDERATION
| | - Nikolai S. Bushkov
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Laboratory of Organometallic Compounds RUSSIAN FEDERATION
| | - Andrey V. Rumyantsev
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Laboratory of Organometallic Compounds RUSSIAN FEDERATION
| | - Anton A. Zhizhin
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Laboratory of Organometallic Compounds RUSSIAN FEDERATION
| | - Dmitry Yu. Aleshin
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Laboratory of Nuclear Magnetic Resonance RUSSIAN FEDERATION
| | - Tatyana V. Strelkova
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Laboratory of Nuclear Magnetic Resonance RUSSIAN FEDERATION
| | - Valeria N. Talanova
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Laboratory of Microanalysis RUSSIAN FEDERATION
| | - Rina U. Takazova
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Laboratory of Microanalysis RUSSIAN FEDERATION
| | - Deni Mance
- ETH Zürich: Eidgenossische Technische Hochschule Zurich DCHAB SWITZERLAND
| | - Florian Allouche
- ETH Zürich: Eidgenossische Technische Hochschule Zurich DCHAB SWITZERLAND
| | - Victor Mougel
- ETH Zürich: Eidgenossische Technische Hochschule Zurich DCHAB SWITZERLAND
| | - Fedor M. Dolgushin
- Kurnakov Institute of General and Inorganic Chemistry RAS: Institut obsej i neorganiceskoj himii imeni N S Kurnakova RAN X-ray RUSSIAN FEDERATION
| | - Nikolai A. Ustynyuk
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Laboratory of Organometallic Compounds RUSSIAN FEDERATION
| | - Pavel A. Zhizhko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences Laboratory for Organometallic Compounds Vavilov str., 28 119991 Moscow RUSSIAN FEDERATION
| | - Dmitry N. Zarubin
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Laboratory of Organometallic Compounds RUSSIAN FEDERATION
| |
Collapse
|
6
|
Itabashi T, Arashiba K, Kuriyama S, Nishibayashi Y. Reactivity of molybdenum-nitride complex bearing pyridine-based PNP-type pincer ligand toward carbon-centered electrophiles. Dalton Trans 2022; 51:1946-1954. [PMID: 35023535 DOI: 10.1039/d1dt03952k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A molybdenum-nitride complex bearing a pyridine-based PNP-type pincer ligand derived from dinitrogen is reacted with various kinds of carbon-centered electrophiles to functionalize the nitride ligand in the molybdenum complex. Methylation with MeOTf and acylation with diphenylacetyl chloride of the nitride complex afford the corresponding imide complexes via a carbon-nitrogen bond formation. In the case of reactions with phenylisocyanate and diphenylketene, the PNP ligand works as a non-innocent ligand to form the corresponding ureate and acylimide complexes, respectively. These newly synthesized complexes are characterized by X-ray analysis. As a further transformation of the prepared imide complexes, hydrolysis of the molybdenum-acylimide complex proceeds to give the corresponding amide as an organonitrogen compound together with the corresponding molybdenum-oxo complex. This result indicates that the nitrogen molecule is converted into organic amide mediated by the molybdenum-nitride complex.
Collapse
Affiliation(s)
- Takayuki Itabashi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Kazuya Arashiba
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Shogo Kuriyama
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Yoshiaki Nishibayashi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| |
Collapse
|
7
|
Pentamethylcyclopentadienyl Molybdenum(V) Complexes Derived from Iodoanilines: Synthesis, Structure, and ROP of ε-Caprolactone. Catalysts 2021. [DOI: 10.3390/catal11121554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The reaction of [Mo(η-C5Me5)Cl4] with the ortho-, meta-, or para-iodo-functionalized anilines 2-IC6H4NH2, 3-IC6H4NH2, 4-IC6H4NH2 yields imido or amine products of the type [Mo(η-C5Me5)Cl2(IC6H4N)] (2-I, 1, 3-I, 3, 4-I, 5) or [Mo(η-C5Me5)Cl4(IC6H4NH2)] (3-I, 2, 4-I, 4), respectively, depending on the reaction stoichiometry/conditions; we were unable to isolate an amine complex of the 2-I derivative. The reaction of [Mo(η-C5Me5)Cl4] with one equivalent of 2-I,4-FC6H3NH2 in the presence of Et3N afforded [Mo(η-C5Me5)Cl2(2-I,4-FC6H3N)]·MeCN (6·MeCN), which, upon exposure to air, afforded the Mo(VI) imido complex [Mo(η-C5Me5)Cl3(2-I,4-FC6H3N)] (7). For comparative studies, the structure of the aniline (C6H5NH2)-derived complex [Mo(η-C5Me5)Cl2(2-C6H3N)] (8) has also been prepared. The molecular structures of 1–8 have been determined and reveal packing in the form of zig-zag chains or ladders. The complexes catalyze, in the presence of benzyl alcohol under N2, the ring-opening polymerization (ROP) of ε-caprolactone affording relatively low molecular weight products. The MALDI-ToF spectra indicate that a number of polymer series bearing a variety of end groups are formed. Conducting the ROPs as melts or under air results in the isolation of higher molecular weight products, again bearing a variety of end groups. Kinetic studies reveal the aniline-derived imido complex 8 performs best, whilst a meta-iodo substituent and a Mo(V) centre are also found to be beneficial. The structures of the side products 2-IC6H4NH3Cl and 3-IC6H4NH3Cl are also reported.
Collapse
|
8
|
Zhizhko PA, Bushkov NS, Pichugov AV, Zarubin DN. Oxo/imido heterometathesis: From molecular stoichiometric studies to well-defined heterogeneous catalysts. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
9
|
Suresh L, Finnstad J, Törnroos KW, Le Roux E. Bis(phenolate)-functionalized N-heterocyclic carbene complexes of oxo- and imido-vanadium(V). Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120301] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
10
|
Junker P, Qu ZW, Kalisch T, Schnakenburg G, Espinosa Ferao A, Streubel R. A case study on the conversion of Li/Cl phosphinidenoid into phosphinidene complexes. Dalton Trans 2021; 50:739-745. [PMID: 33346304 DOI: 10.1039/d0dt03884a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
N,N-Diphenylamino- and N,N-dicyclohexylamino-substituted dichlorophosphane W(CO)5 complexes 1a,b were used to generate thermally very labile Li/Cl phospinidenoid W(CO)5 complexes 2a,b. The formation of transient complex 2a was confirmed via low-temperature 31P{1H} NMR spectroscopy, but further strong evidence for the formation of transient complexes 2a,b was obtained from reactions with methanol and methylamine as formal E-H insertions (E = O, N) furnished complexes 3a,b and 4a. By using toluene in the absence of donor ligands, the primarily nucleophilic complexes 2a,b were converted into electrophilic terminal phosphinidene complexes 5a,b which was deduced from specific trapping reactions using tolane, 1-pentene and 1-hexene and thus obtained 1H-phosphirene 6 and phosphirane complexes 7 and8. The state-of-the-art DFT calculations reveal insights into the possible reaction pathways and exclude a direct reaction of 2a,b with alkene trapping reagents.
Collapse
Affiliation(s)
- Philip Junker
- Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany.
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry, Rheinischen Friedrich-Wilhelms-Universität Bonn, Beringstr. 4, 53115 Bonn, Germany.
| | - Tim Kalisch
- Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany.
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany.
| | - Arturo Espinosa Ferao
- Departamento de Química Orgánica. Facultad de Química. Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain.
| | - Rainer Streubel
- Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany.
| |
Collapse
|
11
|
Fostvedt JI, Grant LN, Kriegel BM, Obenhuber AH, Lohrey TD, Bergman RG, Arnold J. 1,2-Addition and cycloaddition reactions of niobium bis(imido) and oxo imido complexes. Chem Sci 2020; 11:11613-11632. [PMID: 34094408 PMCID: PMC8162998 DOI: 10.1039/d0sc03489d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 09/28/2020] [Indexed: 11/21/2022] Open
Abstract
The bis(imido) complexes (BDI)Nb(N t Bu)2 and (BDI)Nb(N t Bu)(NAr) (BDI = N,N'-bis(2,6-diisopropylphenyl)-3,5-dimethyl-β-diketiminate; Ar = 2,6-diisopropylphenyl) were shown to engage in 1,2-addition and [2 + 2] cycloaddition reactions with a wide variety of substrates. Reaction of the bis(imido) complexes with dihydrogen, silanes, and boranes yielded hydrido-amido-imido complexes via 1,2-addition across Nb-imido π-bonds; some of these complexes were shown to further react via insertion of carbon dioxide to give formate-amido-imido products. Similarly, reaction of (BDI)Nb(N t Bu)2 with tert-butylacetylene yielded an acetylide-amido-imido complex. In contrast to these results, many related mono(imido) Nb BDI complexes do not exhibit 1,2-addition reactivity, suggesting that π-loading plays an important role in activating the Nb-N π-bonds toward addition. The same bis(imido) complexes were also shown to engage in [2 + 2] cycloaddition reactions with oxygen- and sulfur-containing heteroallenes to give carbamate- and thiocarbamate-imido complexes: some of these complexes readily dimerized to give bis-μ-sulfido, bis-μ-iminodicarboxylate, and bis-μ-carbonate complexes. The mononuclear carbamate imido complex (BDI)Nb(NAr)(N( t Bu)CO2) (12) could be induced to eject tert-butylisocyanate to generate a four-coordinate terminal oxo imido intermediate, which could be trapped as the five-coordinate pyridine or DMAP adduct. The DMAP adducted oxo imido complex (BDI)NbO(NAr)(DMAP) (16) was shown to engage in 1,2-addition of silanes across the Nb-oxo π-bond; this represents a new reaction pathway in group 5 chemistry.
Collapse
Affiliation(s)
- Jade I Fostvedt
- Department of Chemistry, University of California Berkeley CA 94720 USA
| | - Lauren N Grant
- Department of Chemistry, University of California Berkeley CA 94720 USA
| | | | | | - Trevor D Lohrey
- Department of Chemistry, University of California Berkeley CA 94720 USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA
| | - Robert G Bergman
- Department of Chemistry, University of California Berkeley CA 94720 USA
| | - John Arnold
- Department of Chemistry, University of California Berkeley CA 94720 USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA
| |
Collapse
|
12
|
Stennett CR, Nguyen TH, Power PP. Characterization of the “Absent” Vanadium Oxo V(═O){N(SiMe3)2}3, Imido V(═NSiMe3){N(SiMe3)2}3, and Imido-Siloxy V(═NSiMe3)(OSiMe3){N(SiMe3)2}2 Complexes Derived from V{N(SiMe3)2}3 and Kinetic Study of the Spontaneous Conversion of the Oxo Complex into Its Imido-Siloxy Isomer. Inorg Chem 2020; 59:11079-11088. [DOI: 10.1021/acs.inorgchem.0c01572] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Cary R. Stennett
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Thien H. Nguyen
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Philip P. Power
- Department of Chemistry, University of California, Davis, California 95616, United States
| |
Collapse
|
13
|
Kawakita K, Kakiuchi Y, Tsurugi H, Mashima K, Parker BF, Arnold J, Tonks IA. Reactivity of terminal imido complexes of group 4-6 metals: stoichiometric and catalytic reactions involving cycloaddition with unsaturated organic molecules. Coord Chem Rev 2020; 407:213118. [PMID: 32863399 PMCID: PMC7453927 DOI: 10.1016/j.ccr.2019.213118] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Imido complexes of early transition metals are key intermediates in the synthesis of many nitrogen-containing organic compounds. The metal-nitrogen double bond of the imido moiety undergoes [2+2] cycloaddition reactions with various unsaturated organic molecules to form new nitrogen-carbon and nitrogen-heteroatom bonds. This review article focuses on reactivity of the terminal imido complexes of Group 4-6 metals, summarizing their stoichiometric reactions and catalytic applications for a variety of reactions including alkyne hydroamination, alkyne carboamination, pyrrole formation, imine metathesis, and condensation reactions of carbonyl compounds with isocyanates.
Collapse
Affiliation(s)
- Kento Kawakita
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Yuya Kakiuchi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Bernard F. Parker
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Ian A. Tonks
- Department of Chemistry, University of Minnesota—Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| |
Collapse
|
14
|
Carsch KM, Lukens JT, DiMucci IM, Iovan DA, Zheng SL, Lancaster KM, Betley TA. Electronic Structures and Reactivity Profiles of Aryl Nitrenoid-Bridged Dicopper Complexes. J Am Chem Soc 2020; 142:2264-2276. [PMID: 31917556 PMCID: PMC7262786 DOI: 10.1021/jacs.9b09616] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Dicopper complexes templated by dinucleating, pacman dipyrrin ligand scaffolds (Mesdmx, tBudmx: dimethylxanthine-bridged, cofacial bis-dipyrrin) were synthesized by deprotonation/metalation with mesitylcopper (CuMes; Mes: mesityl) or by transmetalation with cuprous precursors from the corresponding deprotonated ligand. Neutral imide complexes (Rdmx)Cu2(μ2-NAr) (R: Mes, tBu; Ar: 4-MeOC6H4, 3,5-(F3C)2C6H3) were synthesized by treatment of the corresponding dicuprous complexes with aryl azides. While one-electron reduction of (Mesdmx)Cu2(μ2-N(C6H4OMe)) with potassium graphite initiates an intramolecular, benzylic C-H amination at room temperature, chemical reduction of (tBudmx)Cu2(μ2-NAr) leads to isolable [(tBudmx)Cu2(μ2-NAr)]- product salts. The electronic structures of the thermally robust [(tBudmx)Cu2(μ2-NAr)]0/- complexes were assessed by variable-temperature electron paramagnetic resonance spectroscopy, X-ray absorption spectroscopy (Cu L2,3/K-edge, N K-edge), optical spectroscopy, and DFT/CASSCF calculations. These data indicate that the formally Class IIIA mixed valence complexes of the type [(Rdmx)Cu2(μ2-NAr)]- feature significant NAr-localized spin following reduction from electronic population of the [Cu2(μ2-NAr)] π* manifold, contrasting previous methods for engendering iminyl character through chemical oxidation. The reactivity of the isolable imido and iminyl complexes are examined for prototypical radical-promoted reactivity (e.g., nitrene transfer and H-atom abstraction), where the divergent reactivity is rationalized by the relative degree of N-radical character afforded from different aryl substituents.
Collapse
Affiliation(s)
- Kurtis M. Carsch
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - James T. Lukens
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Ida M. DiMucci
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Diana A. Iovan
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Shao-Liang Zheng
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Kyle M. Lancaster
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Theodore A. Betley
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| |
Collapse
|
15
|
Kawakita K, Kakiuchi Y, Beaumier EP, Tonks IA, Tsurugi H, Mashima K. Synthesis of Pyridylimido Complexes of Tantalum and Niobium by Reductive Cleavage of the N═N Bond of 2,2'-Azopyridine: Precursors for Early-Late Heterobimetallic Complexes. Inorg Chem 2019; 58:15155-15165. [PMID: 31553585 PMCID: PMC7017918 DOI: 10.1021/acs.inorgchem.9b02043] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the syntheses of 2-pyridylimido complexes of tantalum and niobium by N═N bond cleavage of 2,2'-azopyridine. Reaction of MCl5 (M = Ta and Nb) with 2,2'-azopyridine in the presence of 0.5 equiv of 1-methyl-3,6-bis(trimethylsilyl)-1,4-cyclohexadiene (abbreviated Si-Me-CHD) afforded a dark red solution (for Ta) and a dark blue solution (for Nb) with some insoluble precipitates. After removing the solids, another 0.5 equiv of Si-Me-CHD was added to each solution, giving [M(═Npy)Cl3]n (1a: M = Ta; 1b: M = Nb) through reductive cleavage of the N═N bond of 2,2'-azopyridine. The initial products of the above reactions were determined to be 2,2'-azopyridine-bridged dinuclear complexes, [(MCl4)2(μ-pyNNpy)] (2a: M = Ta; 2b: M = Nb), which were isolated by treating MCl5 with 2,2'-azopyridine and Si-Me-CHD in a 2:1:1 molar ratio. In 2a and 2b, the N═N bond was reduced to a single bond via two-electron reduction. Further reduction of complexes 2a and 2b with 1 equiv of Si-Me-CHD afforded complexes 1a and 1b. An anionic doubly μ-imido-bridged ditantalum complex, [nBu4N][Ta2(μ-Npy)2Cl7] (3a), was generated upon addition of nBu4NCl to complex 1a, while addition of nBu4NCl to niobium complex 1b gave a polymeric terminal imido complex, [nBu4N]n/2[{Nb(═Npy)Cl3}2(μ-Cl)]n/2 (3b). Complexations of 1a and 1b with 1 equiv of 2,2'-bipyridine resulted in the formation of mononuclear 2-pyridylimido complexes, M(═Npy)Cl3(bipy) (4a: M = Ta; 4b: M = Nb), whose main structural feature is intramolecular hydrogen bonding between the ortho hydrogen atom of 2,2'-bipyridine and the nitrogen atom of the pyridyl group on the imido ligand. Isolated 2-pyridylimido complexes 4a and 4b reacted with [RhCl(cod)]2 to produce the corresponding early-late heterobimetallic complexes, (bipy)MCl3(μ-Npy)RhCl(cod) (5a: M = Ta; 5b: M = Nb).
Collapse
Affiliation(s)
- Kento Kawakita
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Yuya Kakiuchi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Evan P. Beaumier
- Department of Chemistry, University of Minnesota–Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Ian A. Tonks
- Department of Chemistry, University of Minnesota–Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| |
Collapse
|
16
|
Albertin G, Antoniutti S, Castro J, Sibilla F. Reactions of Organic Azides with Half-sandwich Complexes of Iridium: Preparation of Mono- and Bis(imine) Derivatives. Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201800516] [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)
- Gabriele Albertin
- Dipartimento di Scienze Molecolari e Nanosistemi DSMN; Università Ca' Foscari Venezia, Campus Scientifico; Via Torino 155 30172 Venezia Mestre Italy
| | - Stefano Antoniutti
- Dipartimento di Scienze Molecolari e Nanosistemi DSMN; Università Ca' Foscari Venezia, Campus Scientifico; Via Torino 155 30172 Venezia Mestre Italy
| | - Jesús Castro
- Departamento de Química Inorgánica; Facultade de Química; Universidade de Vigo; 36310 Vigo Galicia Spain
| | - Francesca Sibilla
- Dipartimento di Scienze Molecolari e Nanosistemi DSMN; Università Ca' Foscari Venezia, Campus Scientifico; Via Torino 155 30172 Venezia Mestre Italy
| |
Collapse
|
17
|
Naktode K, Das S, Nayek HP, Panda TK. Reactivity of titanium imidazolin-2-iminato complexes with 2,6-diisopropylaniline and 2-{(2,6-diisopropylphenyl)-iminomethyl}pyrrole. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1544705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Kishor Naktode
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
- Department of Chemistry, Nevjabai Hitkarini College Bramhapuri, Chandrapur, India
| | - Suman Das
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
| | - Hari Pada Nayek
- Department of Applied Chemistry, Indian Institute of Technology (ISM), Dhanbad, India
| | - Tarun K. Panda
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
| |
Collapse
|
18
|
Albertin G, Antoniutti S, Castro J, Ganz V, Sibilla F. Preparation and reactivity of half-sandwich organic azide complexes of osmium. Dalton Trans 2018; 47:11658-11668. [PMID: 30095833 DOI: 10.1039/c8dt02230e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Organic azide complexes [Os(η5-C5H5)(κ1-N3R)(PPh3){P(OR1)3}]BPh4 (1, 2) [R = CH2C6H5 (a), CH2C6H4-4-CH3 (b), CH(CH3)C6H5 (c), C6H5 (d); R1 = Me (1), Et (2)] were prepared by allowing bromo-compounds [OsBr(η5-C5H5)(PPh3){P(OR1)3}] to react first with AgOTf and then with an excess of azide in toluene. Benzylazide complexes reacted in solution leading to imine derivatives [Os(η5-C5H5){κ1-NH[double bond, length as m-dash]C(R2)Ar}(PPh3){P(OR1)3}]BPh4 (3, 4) [R2 = H (a, b), CH3 (c); Ar = C6H5, C6H4-4-CH3; R1 = Me (3), Et (4)]. Phenylazide, on the other hand, reacted in solution affording the dinuclear dinitrogen complex [{Os(η5-C5H5)(PPh3)[P(OMe)3]}2(μ-N2)](BPh4)2 (5). Depending on the nature of the R substituent, the reaction of the p-cymene complex [OsCl2(η6-p-cymene)(PPh3){P(OEt)3}] with RN3 yielded imine [OsCl(η6-p-cymene){κ1-NH[double bond, length as m-dash]C(H)Ar}{P(OEt)3}]BPh4 (6) (Ar = C6H4-4-CH3) and amine derivatives [OsCl(η6-p-cymene)(κ1-NH2C6H5){P(OEt)3}]BPh4 (7). The complexes were characterised spectroscopically (IR, 1H, 31P, 15N NMR) and by the X-ray crystal structure determination of [{Os(η5-C5H5)(PPh3)[P(OMe)3]}2(μ-N2)](BPh4)2 (5).
Collapse
Affiliation(s)
- Gabriele Albertin
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, Italy.
| | | | | | | | | |
Collapse
|
19
|
|
20
|
Synthesis, structure, and characterization of molybdenum(VI) imido complexes with N-salicylidene-2-aminothiophenol. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.02.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
21
|
Manßen M, Weimer I, Adler C, Fischer M, Schmidtmann M, Beckhaus R. From Organic Azides through Titanium Triazenido Complexes to Titanium Imides. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701273] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Manfred Manßen
- Institut für Chemie; Fakultät für Mathematik und Naturwissenschaften; Carl von Ossietzky Universität Oldenburg; Postfach 2503 26111 Oldenburg Germany
| | - Irina Weimer
- Institut für Chemie; Fakultät für Mathematik und Naturwissenschaften; Carl von Ossietzky Universität Oldenburg; Postfach 2503 26111 Oldenburg Germany
| | - Christian Adler
- Institut für Chemie; Fakultät für Mathematik und Naturwissenschaften; Carl von Ossietzky Universität Oldenburg; Postfach 2503 26111 Oldenburg Germany
| | - Malte Fischer
- Institut für Chemie; Fakultät für Mathematik und Naturwissenschaften; Carl von Ossietzky Universität Oldenburg; Postfach 2503 26111 Oldenburg Germany
| | - Marc Schmidtmann
- Institut für Chemie; Fakultät für Mathematik und Naturwissenschaften; Carl von Ossietzky Universität Oldenburg; Postfach 2503 26111 Oldenburg Germany
| | - Rüdiger Beckhaus
- Institut für Chemie; Fakultät für Mathematik und Naturwissenschaften; Carl von Ossietzky Universität Oldenburg; Postfach 2503 26111 Oldenburg Germany
| |
Collapse
|
22
|
Gómez M, Hernández-Prieto C, Martín A, Mena M, Santamaría C. An Effective Route to Dinuclear Niobium and Tantalum Imido Complexes. Inorg Chem 2017; 56:11681-11687. [PMID: 28901759 DOI: 10.1021/acs.inorgchem.7b01652] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Thermal treatment of the trichloro complexes [MCl3(NR)py2] (R = tBu, Xyl; M = Nb, Ta) (Xyl = 2,6-Me2C6H3) under vacuum affords the dinuclear imido species [MCl2(μ-Cl)(NR)py]2 (R = tBu, Xyl; M = Nb 1, 3; Ta 2, 4) with loss of pyridine. Complexes 1-4 can be easily transformed to the mononuclear starting materials [MCl3(NR)py2] (R = tBu, Xyl; M = Nb, Ta) upon reaction with pyridine. While reactions of compounds 1 and 2 with a series of alkylating reagents render the mononuclear peralkylated imido complexes [MR3(NtBu)] (R = Me, CH2Ph, CH2CMe3, CH2CMePh, CH2SiMe3), the analogous treatment with allylmagnesium chloride results in the formation of the dinuclear niobium(IV) derivative [(NtBu)(η3-C3H5)M(μ-C3H5)(μ-Cl)2M(NtBu)py2] (5). Additionally, the treatment of the starting materials 1 and 2 with the organosilicon reductant 1,4-bis(trimethylsilyl)-1,4-diaza-2,5-cyclohexadiene yields the pyridyl-bridged dinuclear derivatives [M2Cl2(μ-Cl)2(NtBu)2py2]2(μ-NC4H4N)2 (M = Nb 6, Ta 7). Controlled hydrolysis reaction of 1 and 2 affords the oxo chlorido-bridged products [MCl(μ-Cl)(NtBu)py]2(μ-O) (M = Nb 8, Ta 9) in a quantitative way, while the treatment of these latter with one more equivalent of pyridine led to complexes [MCl2(NtBu)py2]2(μ-O) (M = Nb 10, Ta 11). Structural study of these dinuclear imido derivatives has been also performed by X-ray crystallography.
Collapse
Affiliation(s)
- Manuel Gómez
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , Campus Universitario, E-28805 Alcalá de Henares, Madrid, Spain
| | - Cristina Hernández-Prieto
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , Campus Universitario, E-28805 Alcalá de Henares, Madrid, Spain
| | - Avelino Martín
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , Campus Universitario, E-28805 Alcalá de Henares, Madrid, Spain
| | - Miguel Mena
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , Campus Universitario, E-28805 Alcalá de Henares, Madrid, Spain
| | - Cristina Santamaría
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , Campus Universitario, E-28805 Alcalá de Henares, Madrid, Spain
| |
Collapse
|
23
|
Clarkson JM, Schafer LL. Bis(tert-butylimido)bis(N,O-chelate)tungsten(VI) Complexes: Probing Amidate and Pyridonate Hemilability. Inorg Chem 2017; 56:5553-5566. [DOI: 10.1021/acs.inorgchem.6b02959] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joseph M. Clarkson
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Laurel L. Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| |
Collapse
|
24
|
|
25
|
Nagae H, Hato W, Kawakita K, Tsurugi H, Mashima K. Arylimido-Bridged Dinuclear Ti(μ-NAr)2Ti Scaffold for Alkyne Insertion into theortho-C−H Bond of Arylimido Ligands. Chemistry 2016; 23:586-596. [DOI: 10.1002/chem.201603580] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Haruki Nagae
- Department of Chemistry; Graduate School of Engineering Science, Osaka University, Toyonaka; Osaka 560-8531 Japan
| | - Wataru Hato
- Department of Chemistry; Graduate School of Engineering Science, Osaka University, Toyonaka; Osaka 560-8531 Japan
| | - Kento Kawakita
- Department of Chemistry; Graduate School of Engineering Science, Osaka University, Toyonaka; Osaka 560-8531 Japan
| | - Hayato Tsurugi
- Department of Chemistry; Graduate School of Engineering Science, Osaka University, Toyonaka; Osaka 560-8531 Japan
| | - Kazushi Mashima
- Department of Chemistry; Graduate School of Engineering Science, Osaka University, Toyonaka; Osaka 560-8531 Japan
| |
Collapse
|
26
|
Iovan DA, Betley TA. Characterization of Iron-Imido Species Relevant for N-Group Transfer Chemistry. J Am Chem Soc 2016; 138:1983-93. [PMID: 26788747 DOI: 10.1021/jacs.5b12582] [Citation(s) in RCA: 135] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A sterically accessible tert-butyl-substituted dipyrrinato di-iron(II) complex [((tBu)L)FeCl]2 possessing two bridging chloride atoms was synthesized from the previously reported solvento adduct. Upon treatment with aryl azides, the formation of high-spin Fe(III) species was confirmed by (57)Fe Mössbauer spectroscopy. Crystallographic characterization revealed two possible oxidation products: (1) a terminal iron iminyl from aryl azides bearing ortho isopropyl substituents, ((tBu)L)FeCl((•)NC6H3-2,6-(i)Pr2); or (2) a bridging di-iron imido arising from reaction with 3,5-bis(trifluoromethyl)aryl azide, [((tBu)L)FeCl]2(μ-NC6H3-3,5-(CF3)2). Similar to the previously reported ((Ar)L)FeCl((•)NC6H4-4-(t)Bu), the monomeric iron imido is best described as a high-spin Fe(III) antiferromagnetically coupled to an iminyl radical, affording an S = 2 spin state as confirmed by SQUID magnetometry. The di-iron imido possesses an S = 0 ground state, arising from two high-spin Fe(III) centers weakly antiferromagnetically coupled through the bridging imido ligand. The terminal iron iminyl complex undergoes facile decomposition via intra- or intermolecular hydrogen-atom abstraction (HAA) from an imido aryl ortho isopropyl group, or from 1,4-cyclohexadiene, respectively. The bridging di-iron imido is a competent N-group transfer reagent to cyclic internal olefins as well as styrene. Although solid-state magnetometry indicates an antiferromagnetic interaction between the two iron centers (J = -108.7 cm(-1)) in [((tBu)L)FeCl]2(μ-NC6H3-3,5-(CF3)2), we demonstrate that in solution the bridging imido can facilitate HAA as well as dissociate into a terminal iminyl species, which then can promote HAA. In situ monitoring reveals the di-iron bridging imido is a catalytically competent intermediate, one of several iron complexes observed in the amination of C-H bond substrates or styrene aziridination.
Collapse
Affiliation(s)
- Diana A Iovan
- Department of Chemistry and Chemical Biology, Harvard University , 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Theodore A Betley
- Department of Chemistry and Chemical Biology, Harvard University , 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| |
Collapse
|
27
|
Tanahashi H, Ikeda H, Tsurugi H, Mashima K. Synthesis and Characterization of Paramagnetic Tungsten Imido Complexes Bearing α-Diimine Ligands. Inorg Chem 2016; 55:1446-52. [PMID: 26841126 DOI: 10.1021/acs.inorgchem.5b02145] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tungsten imido complexes bearing a redox-active ligand, such as N,N'-bis(2,6-diisopropylphenyl)-1,4-diaza-2,3-dimethyl-1,3-butadiene (L1), N,N'-bis(2,6-diisopropylphenyl)-1,4-diaza-1,3-butadiene (L2), and 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (L3), were prepared by salt-free reduction of W(═NC6H3-2,6-(i)Pr2)Cl4 (1) using 1-methyl-3,6-bis(trimethylsilyl)-1,4-cyclohexadiene (MBTCD) followed by addition of the corresponding redox-active ligands. In the initial stage, reaction of W(═NC6H3-2,6-(i)Pr2)Cl4 with MBTCD afforded a tetranuclear W(V) imido cluster, [W(═NC6H3-2,6-(i)Pr2)Cl3]4 (2), which served as a unique precursor for introducing redox-active ligands to the tungsten center to give the corresponding mononuclear complexes with a general formula of W(═NC6H3-2,6-(i)Pr2)Cl3(L) (3, L = L1; 4, L = L2; and 6, L = L3). X-ray analyses of complexes 3 and 6 revealed a neutral coordination mode of L1 and L3 to the tungsten in solid state, while the electron paramagnetic resonance (EPR) spectra of 3 and 4 clarified that a radical was predominantly located on the tungsten center supported by neutral L1 or L2, and the EPR spectra of complex 6 indicated that a radical was delocalized over both the tungsten center and the monoanionic redox-active ligand L3.
Collapse
Affiliation(s)
- Hiromasa Tanahashi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University , Toyonaka, Osaka 560-8531, Japan
| | - Hideaki Ikeda
- Department of Chemistry, Graduate School of Engineering Science, Osaka University , Toyonaka, Osaka 560-8531, Japan
| | - Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University , Toyonaka, Osaka 560-8531, Japan
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University , Toyonaka, Osaka 560-8531, Japan
| |
Collapse
|
28
|
Hamzaoui B, Pelletier JDA, Abou-Hamad E, Basset JM. Well-defined silica-supported zirconium–imido complexes mediated heterogeneous imine metathesis. Chem Commun (Camb) 2016; 52:4617-20. [DOI: 10.1039/c6cc00471g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Well-defined silica-supported zirconium–imido complexes effectively catalyze imine/imine cross-metathesis and are thus considered as the first heterogeneous catalysts active for imine metathesis.
Collapse
Affiliation(s)
- Bilel Hamzaoui
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center (KCC)
- Thuwal
- Saudi Arabia
| | - Jérémie D. A. Pelletier
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center (KCC)
- Thuwal
- Saudi Arabia
| | - Edy Abou-Hamad
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center (KCC)
- Thuwal
- Saudi Arabia
| | - Jean-Marie Basset
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center (KCC)
- Thuwal
- Saudi Arabia
| |
Collapse
|
29
|
Chen GX, Datta A, Hsiao HC, Lin CH, Huang JH. Structural elucidation of tungsten compounds containing arylamine, piperazine and morpholine fragments of pyrrole and keto-amine ligands. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.09.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
30
|
Searles K, Carroll PJ, Mindiola DJ. Anionic and Mononuclear Phosphinidene and Imide Complexes of Niobium. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00518] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Keith Searles
- Department of Chemistry, University of Pennsylvania, 231 South
34th Street, Philadelphia Pennsylvania 19104, United States
| | - Patrick J. Carroll
- Department of Chemistry, University of Pennsylvania, 231 South
34th Street, Philadelphia Pennsylvania 19104, United States
| | - Daniel J. Mindiola
- Department of Chemistry, University of Pennsylvania, 231 South
34th Street, Philadelphia Pennsylvania 19104, United States
| |
Collapse
|
31
|
Saito T, Nishiyama H, Kawakita K, Nechayev M, Kriegel B, Tsurugi H, Arnold J, Mashima K. Reduction of ((t)BuN═)NbCl3(py)2 in a Salt-Free Manner for Generating Nb(IV) Dinuclear Complexes and Their Reactivity toward Benzo[c]cinnoline. Inorg Chem 2015; 54:6004-9. [PMID: 26017157 DOI: 10.1021/acs.inorgchem.5b00812] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The organosilicon reducing reagent 2,3,5,6-tetramethyl-1,4-bis(trimethylsilyl)-1,4-diaza-2,5-cyclohexadiene (1a) was used for the one-electron, salt-free reduction of ((t)BuN═)NbCl3(py)2 (2), resulting in the formation of a neutral, triply chloride-bridged dinuclear niobium(IV) complex, [((t)BuN═)ClNb(py)](μ-Cl)3[((t)BuN═)Nb(py)2] (3) in moderately high yield. Heating 3 in toluene at 80 °C caused a unique intramolecular rearrangement of 3 to another neutral dinuclear complex, [Cl2Nb(py)](μ-Cl)(μ-N(t)Bu)2[ClNb(py)2] (4), in which two niobium(IV) atoms were bridged by one chloride atom and two imido ligands. Reaction of complex 3 with benzo[c]cinnoline produced a benzo[c]cinnoline-bridged dinuclear niobium(V) complex 7 by an overall two-electron reduction of benzo[c]cinnoline through a disproportionation of 3 into a mixture of a niobium(V) complex 2 and a niobium(III) complex, the latter of which efficiently reduced benzo[c]cinnoline.
Collapse
Affiliation(s)
- Teruhiko Saito
- †Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Haruka Nishiyama
- †Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kento Kawakita
- †Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Michael Nechayev
- ‡Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Benjamin Kriegel
- ‡Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Hayato Tsurugi
- †Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - John Arnold
- ‡Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Kazushi Mashima
- †Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| |
Collapse
|
32
|
Ahrenholtz SR, Landaverde-Alvarado C, Whiting M, Lin S, Slebodnick C, Marand E, Morris AJ. Thermodynamic Study of CO2 Sorption by Polymorphic Microporous MOFs with Open Zn(II) Coordination Sites. Inorg Chem 2015; 54:4328-36. [DOI: 10.1021/ic503047y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
| | | | - Macauley Whiting
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Shaoyang Lin
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Carla Slebodnick
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Eva Marand
- Department of Chemical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Amanda J. Morris
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| |
Collapse
|
33
|
Pastor A, Montilla F, Galindo A. Oxido- versus imido-transfer reactions in oxido–imido molybdenum(VI) complexes: A combined experimental and theoretical study. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.02.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
34
|
Tanahashi H, Tsurugi H, Mashima K. Synthesis of Alkyl and Alkylidene Complexes of Tungsten Bearing Imido and Redox-Active α-Diimine or o-Iminoquinone Ligands and Their Application as Catalysts for Ring-Opening Metathesis Polymerization of Norbornene. Organometallics 2015. [DOI: 10.1021/om501010n] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Hiromasa Tanahashi
- Department of Chemistry,
Graduate School of Engineering Science, Osaka University and CREST, JST, Toyonaka, Osaka 560-8531, Japan
| | - Hayato Tsurugi
- Department of Chemistry,
Graduate School of Engineering Science, Osaka University and CREST, JST, Toyonaka, Osaka 560-8531, Japan
| | - Kazushi Mashima
- Department of Chemistry,
Graduate School of Engineering Science, Osaka University and CREST, JST, Toyonaka, Osaka 560-8531, Japan
| |
Collapse
|
35
|
Yang W, Zhao KQ, Redshaw C, Elsegood MRJ. Molybdenum complexes derived from the oxydianiline [(2-NH2C6H4)2O]: synthesis, characterization and ε-caprolactone ROP capability. Dalton Trans 2015; 44:13133-40. [DOI: 10.1039/c5dt01799h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Imido containing molybdenum complexes, structurally characterized from reactions involving 2,2′-oxydianiline with either Na2MoO4 or Mo(NtBu)2Cl2(DME), can ring open polymerize ε-caprolactone with good conversion at 100 °C.
Collapse
Affiliation(s)
- Wenxue Yang
- Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- China
| | - Ke-Qing Zhao
- Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- China
| | - Carl Redshaw
- Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- China
- Department of Chemistry
| | | |
Collapse
|
36
|
Havlík A, Lamač M, Pinkas J, Růžička A, Horáček M. Mixed amido-cyclopentadienyl group 4 metal complexes. RSC Adv 2015. [DOI: 10.1039/c5ra07742g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Two different kinds of nitrogen ligands and two Cp ligands with different electronic and steric effects were employed in order to demonstrate variability of the group 4 metal coordination spheres.
Collapse
Affiliation(s)
- Aleš Havlík
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of The Czech Republic
- 182 23 Prague 8
- Czech Republic
- Department of General and Inorganic Chemistry
| | - Martin Lamač
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of The Czech Republic
- 182 23 Prague 8
- Czech Republic
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of The Czech Republic
- 182 23 Prague 8
- Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- 532 10 Pardubice 2
- Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of The Czech Republic
- 182 23 Prague 8
- Czech Republic
| |
Collapse
|
37
|
Yonke BL, Reeds JP, Fontaine PP, Zavalij PY, Sita LR. Catalytic Production of Isocyanates via Orthogonal Atom and Group Transfers Employing a Shared Formal Group 6 M(II)/M(IV) Redox Cycle. Organometallics 2014. [DOI: 10.1021/om500532s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Brendan L. Yonke
- Department of Chemistry and
Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Jonathan P. Reeds
- Department of Chemistry and
Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Philip P. Fontaine
- Department of Chemistry and
Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Peter Y. Zavalij
- Department of Chemistry and
Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Lawrence R. Sita
- Department of Chemistry and
Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| |
Collapse
|
38
|
Eller K, Schwarz H. Gas-Phase Chemistry of Isolated Metal Ions: Are Predictions on Catalytic Properties Possible Based on the Study of Simple Model Reactions? ACTA ACUST UNITED AC 2014. [DOI: 10.1002/bbpc.199000028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
39
|
Adler C, Bekurdts A, Haase D, Saak W, Schmidtmann M, Beckhaus R. Bulky Titanium Amides: C-H Bond Activation under Mild Conditions. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201400022] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
40
|
Xiong Y, Yao S, Driess M. Synthesis and structure of the azidogermyliumylidene azide complex [L(N3)Ge:]+N3−with covalently and ionically bonded azide ligands at germanium(ii) [L = bis(N-heterocyclic carbene)]. Chem Commun (Camb) 2014; 50:418-20. [DOI: 10.1039/c3cc48166b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
41
|
Reactions of IrHCl2(PPh3)2{P(OEt)3} with Organic Azides: Formation of Aminophosphonium Salts. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300261] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
42
|
Caballo J, González-Moreiras M, Mena M, Pérez-Redondo A, Yélamos C. Reactivity with electrophiles of imido groups supported on trinuclear titanium systems. Inorg Chem 2013; 52:11519-29. [PMID: 24060208 DOI: 10.1021/ic4018294] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Several trinuclear titanium complexes bearing amido μ-NHR, imido μ-NR, and nitrido μn-N ligands have been prepared by reaction of [{Ti(η(5)-C5Me5)(μ-NH)}3(μ3-N)] (1) with 1 equiv of electrophilic reagents ROTf (R = H, Me, SiMe3; OTf = OSO2CF3). Treatment of 1 with triflic acid or methyl triflate in toluene at room temperature affords the precipitation of compounds [Ti3(η(5)-C5Me5)3(μ3-N)(μ-NH)2(μ-NH2)(OTf)] (2) or [Ti3(η(5)-C5Me5)3(μ3-N)(μ-NH)(μ-NH2)(μ-NMe)(OTf)] (3). Complexes 2 and 3 exhibit a fluxional behavior in solution consisting of proton exchange between μ-NH2 and μ-NH groups, assisted by the triflato ligand, as could be inferred from a dynamic NMR spectroscopy study. Monitoring by NMR spectroscopy the reaction course of 1 with MeOTf allows the characterization of the methylamido intermediate [Ti3(η(5)-C5Me5)3(μ3-N)(μ-NH)2(μ-NHMe)(OTf)] (4), which readily rearranges to give 3 by a proton migration from the NHMe amido group to the NH imido ligands. The treatment of 1 with 1 equiv of Me3SiOTf produces the stable ionic complex [Ti3(η(5)-C5Me5)3(μ3-N)(μ-NH)2(μ-NHSiMe3)][OTf] (5) with a disposition of the nitrogen ligands similar to that of 4. Complex 5 reacts with 1 equiv of [K{N(SiMe3)2}] at room temperature to give [Ti3(η(5)-C5Me5)3(μ3-N)(μ-N)(μ-NH)(μ-NHSiMe3)] (6), which at 85 °C rearranges to the trimethylsilylimido derivative [Ti3(η(5)-C5Me5)3(μ3-N)(μ-NH)2(μ-NSiMe3)] (7). Treatment of 7 with [K{N(SiMe3)2}] affords the potassium derivative [K{(μ3-N)(μ3-NH)(μ3-NSiMe3)Ti3(η(5)-C5Me5)3(μ3-N)}] (8), which upon addition of 18-crown-6 leads to the ion pair [K(18-crown-6)][Ti3(η(5)-C5Me5)3(μ3-N)(μ-N)(μ-NH)(μ-NSiMe3)] (9). The X-ray crystal structures of 2, 5, 6, and 8 have been determined.
Collapse
Affiliation(s)
- Jorge Caballo
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , 28871 Alcalá de Henares-Madrid, Spain
| | | | | | | | | |
Collapse
|
43
|
Huang JH, Chi LS, Huang FM, Kuo PC, Zhou CC, Lee GH, Peng SM. Metal Imido Complexes (M=Ti, W) Containing 2-(Dimethylaminomethyl)pyrrole: Synthesis and the Crystal Structures of ButN=TiCIPy2[2-Me2NCH2(C4H3N)] and PhN=WCl3[2-Me2NCH2(C4H3N)]. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200000121] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
44
|
La Pierre HS, Minasian SG, Abubekerov M, Kozimor SA, Shuh DK, Tyliszczak T, Arnold J, Bergman RG, Toste FD. Vanadium Bisimide Bonding Investigated by X-ray Crystallography, 51V and 13C Nuclear Magnetic Resonance Spectroscopy, and V L3,2-Edge X-ray Absorption Near-Edge Structure Spectroscopy. Inorg Chem 2013; 52:11650-60. [DOI: 10.1021/ic4020543] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Henry S. La Pierre
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Stefan G. Minasian
- Inorganic,
Isotope and Actinide Chemistry, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
- Chemical
Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Mark Abubekerov
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Stosh A. Kozimor
- Inorganic,
Isotope and Actinide Chemistry, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - David K. Shuh
- Chemical
Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Tolek Tyliszczak
- Chemical
Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - John Arnold
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Robert G. Bergman
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - F. Dean Toste
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| |
Collapse
|
45
|
Wu J, Chen Y, Chen Z, Liu W, Li Y, Pei H, Liu Y, Gao Q, Li W. Synthesis, Structures and DFT Studies of Imido-bridged and (Bis)ligand-coordinated Titanium Complexes. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
46
|
Albertin G, Antoniutti S, Bonaldo L, Botter A, Castro J. Azo Complexes of Osmium(II): Preparation and Reactivity of Organic Azide and Hydrazine Derivatives. Inorg Chem 2013; 52:2870-9. [DOI: 10.1021/ic302483e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gabriele Albertin
- Dipartimento di Scienze Molecolari
e Nanosistemi, Università Ca’ Foscari Venezia, Dorsoduro 2137, 30123 Venezia, Italy
| | - Stefano Antoniutti
- Dipartimento di Scienze Molecolari
e Nanosistemi, Università Ca’ Foscari Venezia, Dorsoduro 2137, 30123 Venezia, Italy
| | - Laura Bonaldo
- Dipartimento di Scienze Molecolari
e Nanosistemi, Università Ca’ Foscari Venezia, Dorsoduro 2137, 30123 Venezia, Italy
| | - Alessandra Botter
- Dipartimento di Scienze Molecolari
e Nanosistemi, Università Ca’ Foscari Venezia, Dorsoduro 2137, 30123 Venezia, Italy
| | - Jesús Castro
- Departamento de Química Inorgánica, Universidade de Vigo, Facultade de Química,
Edificio de Ciencias Experimentais, 36310 Vigo (Galicia), Spain
| |
Collapse
|
47
|
Elorriaga D, Carrillo-Hermosilla F, Antiñolo A, Suárez FJ, López-Solera I, Fernández-Galán R, Villaseñor E. Asymmetric niobium guanidinates as intermediates in the catalytic guanylation of amines. Dalton Trans 2013; 42:8223-30. [DOI: 10.1039/c3dt50477h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
48
|
Harrold ND, Hillhouse GL. Strongly bent nickel imides supported by a chelating bis(N-heterocyclic carbene) ligand. Chem Sci 2013. [DOI: 10.1039/c3sc51517f] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
49
|
Munhá RF, Zarkesh RA, Heyduk AF. Group transfer reactions of d0 transition metal complexes: redox-active ligands provide a mechanism for expanded reactivity. Dalton Trans 2013; 42:3751-66. [DOI: 10.1039/c2dt32063k] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
50
|
Wicker BF, Fan H, Hickey AK, Crestani MG, Scott J, Pink M, Mindiola DJ. Evidence for the Existence of Terminal Scandium Imidos: Mechanistic Studies Involving Imido–Scandium Bond Formation and C–H Activation Reactions. J Am Chem Soc 2012; 134:20081-96. [DOI: 10.1021/ja307279r] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin F. Wicker
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United
States
| | - Hongjun Fan
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United
States
| | - Anne K. Hickey
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United
States
| | - Marco G. Crestani
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United
States
| | - Jennifer Scott
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United
States
| | - Maren Pink
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United
States
| | - Daniel J. Mindiola
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United
States
| |
Collapse
|