51
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Rädisch T, Harmgarth N, Liebing P, Beltrán-Leiva MJ, Páez-Hernández D, Arratia-Pérez R, Engelhardt F, Hilfert L, Oehler F, Busse S, Edelmann FT. Three new types of transition metal carboranylamidinate complexes. Dalton Trans 2018; 47:6666-6671. [PMID: 29675535 DOI: 10.1039/c8dt01064a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three new types of transition metal carboranylamidinate complexes are reported.
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Affiliation(s)
- Tim Rädisch
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Nicole Harmgarth
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Phil Liebing
- ETH Zürich
- Laboratorium für Anorganische Chemie
- 8093 Zürich
- Switzerland
| | | | | | | | - Felix Engelhardt
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Liane Hilfert
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Florian Oehler
- Martin-Luther-Universität Halle-Wittenberg
- Institut für Chemie
- Bereich Anorganische Chemie
- 06120 Halle (Saale)
- Germany
| | - Sabine Busse
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
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52
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Akpan ED, Omondi B, Ojwach SO. Ring-Opening Polymerization Reactions of ε-Caprolactone and Lactides Initiated by (Benzimidazolylmethyl)amino Magnesium(II) Alkoxides. Aust J Chem 2018. [DOI: 10.1071/ch17506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Reactions of (benzimidazolylmethyl)amine ligands N-((1H-benzo[s]imidazol-2-yl)methyl)-2,6-dimethylaniline (L1), N-((1H-benzo[d]imidazol-2-yl)methyl)-2,6-diisopropylaniline (L2), and N-((1H-benzo[d]imidazol-2-yl)methyl)-2,4,6-trimethylaniline (L3) with Mg(nBu)2 in the presence of either benzyl alcohol (BnOH) or tert-butyl alcohol (t-BuOH) afforded the respective MgII alkoxides [Mg(L1)(OBn)]2 (1), [(Mg(L2)(OBn)]2 (2), [Mg(L3)(OBn)]2 (3), [Mg(L2)(t-BuO)]2 (4). Complexes 1–4 formed efficient catalysts for the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL), d,l-lactide (d,l-LA) and l-lactide (l-LA) at 110°C. The catalytic activities of these complexes in the ROP reactions were influenced by the steric effect of the ligands. Kinetic studies showed pseudo-first-order dependency on monomer. Polycaprolactone and polylactides of moderate weight-average molecular weights of 15285 and 5200 g mol−1 and fairly narrow polydispersity indexes from 1.24 to 1.58 were produced.
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53
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Wusiman A, Hudabaierdi R. Efficient synthesis of N-oxysulfonyl formamidines through thionyl chloride-promoted reaction of sulfamates with formamides. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2017.1361999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Abudureheman Wusiman
- School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, People’s Republic of China
| | - Ruzeahong Hudabaierdi
- School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, People’s Republic of China
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54
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Novotný M, Švec P, Růžičková Z, Růžička A. Direct access to non-symmetric lithium nitriloamidinate and disymmetric dilithium bisamidinate complexes from 1,3- or 1,4- dicyanobenzene and lithium amides. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.09.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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55
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Luo Y, Gao Z, Chen J. Rare-earth metal bis(silylamide) complexes supported by ferrocene-substituted amidinate and their performance in cis -1,4 selective polymerization of isoprene. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.05.056] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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56
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Gámez-Rivera SA, Francos J, Borge J, Cadierno V. Mononuclear Ruthenium and Osmium Complexes with a Bicyclic Guanidinate Ligand: Synthesis and Catalytic Behavior in Olefin Isomerization Processes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700727] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sebastián A. Gámez-Rivera
- Laboratorio de Compuestos Organometálicos y Catálisis (Unidad Asociada al CSIC); Centro de Innovación en Química Avanzada (ORFEO-CINQA); Departamento de Química Orgánica e Inorgánica; Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; Julián Clavería 8 33006 Oviedo Spain
| | - Javier Francos
- Laboratorio de Compuestos Organometálicos y Catálisis (Unidad Asociada al CSIC); Centro de Innovación en Química Avanzada (ORFEO-CINQA); Departamento de Química Orgánica e Inorgánica; Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; Julián Clavería 8 33006 Oviedo Spain
| | - Javier Borge
- Departamento de Química Física y Analítica; Centro de Innovación en Química Avanzada (ORFEO-CINQA); Universidad de Oviedo; Julián Clavería 8 33006 Oviedo Spain
| | - Victorio Cadierno
- Laboratorio de Compuestos Organometálicos y Catálisis (Unidad Asociada al CSIC); Centro de Innovación en Química Avanzada (ORFEO-CINQA); Departamento de Química Orgánica e Inorgánica; Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; Julián Clavería 8 33006 Oviedo Spain
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57
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Ramos A, Antiñolo A, Carrillo-Hermosilla F, Fernández-Galán R, Montero-Rama MDP, Villaseñor E, Rodríguez-Diéguez A, García-Vivó D. Insertion reactions of small unsaturated molecules in the N-B bonds of boron guanidinates. Dalton Trans 2017; 46:10281-10299. [PMID: 28737819 DOI: 10.1039/c7dt02081c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report here 1,1- and 1,2-insertion reactions of small unsaturated molecules in the N-B bonds of two boron guanidinates, (Me2N)C(NiPr)2BCy2 (1) and {iPr(H)N}C(NiPr){N(p-tBu-C6H4)}BCy2 (2), and two bisboron guanidinates(2-), {iPr(BCy2)N}C(NiPr){N(p-tBu-C6H4)}BCy2 (3) and {iPr(C8H14B)N}C(NiPr){N(p-Me-C6H4)}BC8H14 (4), the latter being prepared for the first time by double deprotonation of the corresponding guanidine with the 9-borabicyclo[3.3.1]nonane dimer, (H-BC8H14)2. Compounds 1-4 easily insert aromatic isonitriles, XylNC (Xyl = 2,6-Me2-C6H3) and (p-MeO-C6H4)NC, to give the expected diazaboroles 5-12, some of them being structurally characterised by X-ray diffraction. Interestingly, the BC8H14 derivatives 11 and 12 are in a fast temperature-dependent equilibrium with the de-insertion products, whose thermodynamic parameters are reported here. A correlation between these equilibria and the puckered heterocyclic structure found in the solid state for 11, and confirmed by DFT calculations, is also established. Reactions of the aforementioned guanidinates with CO are more sluggish or even precluded, and only one product, {iPr(H)N}C{N(p-tBu-C6H4)}(NiPr)(CO)BCy2 (13), could be isolated in moderate yields. The 1,2-insertions of benzaldehyde in compounds 1, 2 and 4 are reversible reactions in all cases, and only one of the insertion products, {iPr(H)N}C{N(p-tBu-C6H4)}(NiPr)(PhHCO)BCy2 (16a), was isolated and diffractrometrically characterised. Likewise, CO2 reversibly inserts into a N-B bond of 2 to give {iPr(H)N}C{N(p-tBu-C6H4)}(NiPr)(CO2)BCy2 (19) with a conversion of ca. 9%. In all these equilibria, de-insertion is always favoured upon increasing the temperature.
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Affiliation(s)
- Alberto Ramos
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Instituto Regional de Investigación Científica Aplicada, Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain.
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58
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Spontaneous vs. Base‐Induced Dehydrochlorination of Group 14
ortho
‐Carboranylamidinates. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700500] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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59
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Tolpygin AO, Luconi L, Shavyrin AS, Tuci G, Cherkasov AV, Rossin A, Fukin GK, Giambastiani G, Trifonov AA. (Amido)‐ and (Chlorido)titanium and ‐zirconium Complexes Coordinated by
ansa
‐Bis(amidinate) Ligands with a Rigid
o
‐Phenylene Linker. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700497] [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)
- Aleksei O. Tolpygin
- Institute of Organometallic Chemistry of Russian Academy of Sciences Tropinina 49, GSP‐445 630950 Nizhny Novgorod Russia
| | - Lapo Luconi
- Institute of Chemistry of OrganoMetallic Compounds ICCOM‐CNR Via Madonna del Piano 10 50019 Sesto Fiorentino, Florence Italy
| | - Andrei S. Shavyrin
- Institute of Organometallic Chemistry of Russian Academy of Sciences Tropinina 49, GSP‐445 630950 Nizhny Novgorod Russia
| | - Giulia Tuci
- Institute of Chemistry of OrganoMetallic Compounds ICCOM‐CNR Via Madonna del Piano 10 50019 Sesto Fiorentino, Florence Italy
| | - Anton V. Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences Tropinina 49, GSP‐445 630950 Nizhny Novgorod Russia
| | - Andrea Rossin
- Institute of Chemistry of OrganoMetallic Compounds ICCOM‐CNR Via Madonna del Piano 10 50019 Sesto Fiorentino, Florence Italy
| | - Georgy K. Fukin
- Institute of Organometallic Chemistry of Russian Academy of Sciences Tropinina 49, GSP‐445 630950 Nizhny Novgorod Russia
| | - Giuliano Giambastiani
- Institute of Chemistry of OrganoMetallic Compounds ICCOM‐CNR Via Madonna del Piano 10 50019 Sesto Fiorentino, Florence Italy
- Kazan Federal University 420008 Kazan Russian Federation
| | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences Tropinina 49, GSP‐445 630950 Nizhny Novgorod Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences Vavilova str. 28 119334 Moscow Russia
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60
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Rad’kov VY, Cherkasov AV, Kovylina TA, Trifonov AA. Rare-earth metal dichloride and bis(alkyl) complexes containing amidinate-amidopyridinate ligands: synthesis, structure, and reactivity. Russ Chem Bull 2017. [DOI: 10.1007/s11172-016-1660-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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61
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Yang F, Li X. Novel cationic rare earth metal alkyl catalysts for precise olefin polymerization. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28617] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Fanzhi Yang
- Advanced Research Institute for Multidisciplinary Science, Beijing Institute of Technology; Haidian Beijing 100081 China
| | - Xiaofang Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Cluster Science of Ministry of Education; Beijing Institute of Technology; Haidian Beijing 100081 China
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62
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Novotný M, Švec P, Růžičková Z, Růžička A. Structure of non-symmetric lithium amidinate complexes prepared by addition of lithium amides to various nitriles. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.11.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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63
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Wang S, Harmgarth N, Liebing P, Edelmann FT. Crystal and mol-ecular structures of two silver(I) amidinates, including an unexpected co-crystal with a lithium amidinate. Acta Crystallogr E Crystallogr Commun 2016; 72:1786-1790. [PMID: 27980831 PMCID: PMC5137609 DOI: 10.1107/s2056989016017680] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 11/05/2016] [Indexed: 11/16/2022]
Abstract
The silver(I) amidinates bis-[μ-N1,N2-bis-(propan-2-yl)benzamidinato-κ2N1:N2]disilver(I), [Ag2(C13H19N2)2] or [Ag{PhC(N i Pr)2}]2 (1), and bis-(μ-N1,N2-di-cyclohexyl-3-cyclo-propyl-propynamidinato-κ2N1:N2)disilver(I), [Ag2(C18H27N2)2] or [Ag{cyclo-C3H5-C≡C-C(NCy)2}]2 (2a), exist as centrosymmetric dimers with a planar Ag2N4C2 ring and a common linear coordination of the metal atoms in the crystalline state. Moiety 2a forms a co-crystal with the related lithium amidinate, namely bis-(μ-N1,N2-di-cyclo-hexyl-3-cyclo-propyl-propynamidinato-κ2N1:N2)disilver(I) bis-(μ-N1,N2-di-cyclo-hexyl-3-cyclo-propyl-propynamidinato-κ3N1,N2:N1)bis-(tetra-hydro-furan-κO)lithium(I) toluene monosolvate, [Ag2(C18H27N2)2][Li2(C18H27N2)2(C4H8O)2]·C7H8 or [Ag{cyclo-C3H5-C≡C-C(NCy)2}]2[Li{cyclo-C3H5-C≡C-C(NCy)2}(THF)]2·C7H8, composed as 2a × 2b × toluene. The lithium moiety 2b features a typical ladder-type dimeric structure with a distorted tetra-hedral coordination of the metal atoms. In the silver(I) derivatives 1 and 2a, the amidinate ligand adopts a μ-κN:κN' coordination, while it is a μ-κN:κN:κN'-coordination in the case of lithium derivative 2b.
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Affiliation(s)
- Sida Wang
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Nicole Harmgarth
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Phil Liebing
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
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64
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Sroor FM, Liebing P, Hrib CG, Gräsing D, Hilfert L, Edelmann FT. Formation and structure of the first metal complexes comprising amidino-guanidinate ligands. Acta Crystallogr E Crystallogr Commun 2016; 72:1526-1531. [PMID: 27840700 PMCID: PMC5095825 DOI: 10.1107/s2056989016015322] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 09/29/2016] [Indexed: 11/21/2022]
Abstract
The first metal complexes comprising amidino-guanidinate ligands have been prepared and structurally characterized, namely bis-[μ-N,N',N'',N'''-tetraisopropyl-1-(1-butyl-amidinato)guanidinato-κ3N1,N2:N2]bis-[(tetra-hydro-furan)lithium], [Li2(C18H37N4)2(C4H8O)2], (2), and [bis-(tetra-hydro-furan)-lithium]-di-μ-chlorido-{(N,N'-di-cyclo-hexyl-1-butyl-amidinato-κ2N1,N2)[N,N',N'',N'''-tetra-cyclo-hexyl-1-(1-butyl-amidinato)guanidinato-κ2N1,N2]holmate(III)}, [HoLiCl2(C4H8O)2(C17H31N2)(C30H53N4)], (3). The novel lithium amidino-guanidinate precursors Li[ n BuC(=NR)(NR)C(NR)2] [1: R = Cy (cyclo-hex-yl), 2: R = i Pr) were obtained by treatment of N,N'-diorganocarbodi-imides, R-N=C=N-R (R = i Pr, Cy), with 0.5 equivalents of n-butyl-lithium under well-defined reaction conditions. An X-ray diffraction study of 2 revealed a ladder-type dimeric structure in the solid state. Reaction of anhydrous holmium(III) chloride with in situ-prepared 2 afforded the unexpected holmium 'ate' complex [ n BuC(=NCy)(NCy)C(NCy)2]Ho[ n BuC(NCy)2](μ-Cl)2Li(THF)2 (3) in 71% yield. An X-ray crystal structure determination of 3 showed that this complex contains both an amidinate ligand and the new amidino-guanidinate ligand.
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Affiliation(s)
- Farid M. Sroor
- Organometallic and Organometalloid Chemistry Department, National Research, Centre, 12622 Dokki, Cairo, Egypt
| | - Phil Liebing
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Cristian G. Hrib
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Daniel Gräsing
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Liane Hilfert
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
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65
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Hafeez M, Riaz M. Aminopyridine stabilized group-IV metal complexes and their applications. APPLIED PETROCHEMICAL RESEARCH 2016. [DOI: 10.1007/s13203-016-0170-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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66
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López Ortiz F, García López J, Casimiro M, Iglesias MJ. Diastereoselective Ortho Lithiation of Phosphinimidic Amides: A Multinuclear Magnetic Resonance and Computational Study. J Org Chem 2016; 81:11095-11103. [DOI: 10.1021/acs.joc.6b02083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Fernando López Ortiz
- Área
de Química
Orgánica, Universidad de Almería, Carretera de Sacramento s/n, 04120 Almería, Spain
| | - Jesús García López
- Área
de Química
Orgánica, Universidad de Almería, Carretera de Sacramento s/n, 04120 Almería, Spain
| | - María Casimiro
- Área
de Química
Orgánica, Universidad de Almería, Carretera de Sacramento s/n, 04120 Almería, Spain
| | - María José Iglesias
- Área
de Química
Orgánica, Universidad de Almería, Carretera de Sacramento s/n, 04120 Almería, Spain
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Chu W, Du L, Xu C, Ding Y. Synthesis, characterization, and thermal properties of silicon(IV) compounds containing amidinate ligands as CVD precursors. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2016.1192619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Wenxiang Chu
- The Key Laboratory for Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Liyong Du
- The Key Laboratory for Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Chongying Xu
- The Key Laboratory for Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu Province, China
- Jiangsu Nata Opto-Electronic Material Co. Ltd., Suzhou Industrial Park, Jiangsu Province, China
| | - Yuqiang Ding
- The Key Laboratory for Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu Province, China
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Wang S, Sroor FM, Liebing P, Lorenz V, Hilfert L, Edelmann FT. Crystal structures of two ytterbium(III) complexes comprising alkynylamidinate ligands. Acta Crystallogr E Crystallogr Commun 2016; 72:1229-1233. [PMID: 27920904 PMCID: PMC5120694 DOI: 10.1107/s2056989016012135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 07/26/2016] [Indexed: 11/11/2022]
Abstract
Two ytterbium(III) complexes comprising alkynylamidinate ligands, namely bis-(η5-cyclo-penta-dien-yl)(3-cyclo-propyl-N,N'-diiso-propyl-propynamidinato-κ2N,N')ytterbium(III), [Yb(C5H5)2(C12H19N2)] or Cp2Yb[( i Pr2N)2C-C≡C-c-C3H5] (1) and tris-(3-phenyl-N,N'-di-cyclo-hexyl-propynamidinato-κ2N,N')ytterbium(III), [Yb(C21H27N2)3] or Yb[(CyN)2C-C≡C-Ph]3 (Cy = cyclo-hex-yl) (2) have been synthesized and structurally characterized. Both complexes are monomers; for complex 2, the contribution to the scattering from highly disordered toluene solvent molecules in these voids was removed with the SQUEEZE routine [Spek (2015). Acta Cryst. C71, 9-18] in PLATON. The stated crystal data for Mr, μ etc. do not take these into account.
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Affiliation(s)
- Sida Wang
- Chemisches Institut der Otto-von-Guericke-Universitaet Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany
| | - Farid M. Sroor
- Organometallic and Organometalloid Chemistry Department, National Research, Centre, 12622 Cairo, Egypt
| | - Phil Liebing
- Chemisches Institut der Otto-von-Guericke-Universitaet Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany
| | - Volker Lorenz
- Chemisches Institut der Otto-von-Guericke-Universitaet Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany
| | - Liane Hilfert
- Chemisches Institut der Otto-von-Guericke-Universitaet Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universitaet Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany
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Chiarella GM, Feng C, Murillo CA, Zhao Q. Exploring the Intricacies of Weak Interactions in Metal–Metal Bonds Using an Unsymmetrical Carbonyl Precursor and a Triple-Bonded W26+ Paddlewheel. Inorg Chem 2016; 55:9471-81. [DOI: 10.1021/acs.inorgchem.6b01728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Gina M. Chiarella
- Department of Chemistry, Texas A&M University, P.O. Box 3012, College Station, Texas 77842-3012, United States
| | - Chao Feng
- Department of Chemistry, University of the Pacific, 3601 Pacific Avenue, Stockton, California 95211, United States
| | - Carlos A. Murillo
- Department of Chemistry, Texas A&M University, P.O. Box 3012, College Station, Texas 77842-3012, United States
- Department of Chemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Qinliang Zhao
- Department of Chemistry, University of the Pacific, 3601 Pacific Avenue, Stockton, California 95211, United States
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Synthesis and structures of mono(β-diiminato) copper complexes and their catalytic performances for homo- and copolymerizations of methyl acrylate. TRANSIT METAL CHEM 2016. [DOI: 10.1007/s11243-016-0088-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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71
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Holtrichter-Rößmann T, Häger I, Daniliuc CG, Fröhlich R, Bergander K, Troll C, Rieger B, Rojas RS, Würthwein EU. Catalytically Active N-Acylamidine–Zirconium Complexes: Synthesis, Structures, and Application in Ethylene Polymerization. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00240] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thorsten Holtrichter-Rößmann
- Organisch-Chemisches
Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
- Chemtura Organometallics GmbH, Ernst Schering Straße 14, D-59192 Bergkamen, Germany
| | - Ina Häger
- Organisch-Chemisches
Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | | | - Roland Fröhlich
- Organisch-Chemisches
Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Klaus Bergander
- Organisch-Chemisches
Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Carsten Troll
- WACKER-Lehrstuhl
für Makromolekulare Chemie, Technische Universität München, Lichtenbergstraße 4, D-85747 Garching, Germany
| | - Bernhard Rieger
- WACKER-Lehrstuhl
für Makromolekulare Chemie, Technische Universität München, Lichtenbergstraße 4, D-85747 Garching, Germany
| | - René S. Rojas
- Departamento
de Química Inorgánica, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Santiago-22, Chile
| | - Ernst-Ulrich Würthwein
- Organisch-Chemisches
Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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72
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73
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Shoken D, Shimon LJW, Tamm M, Eisen MS. Synthesis of Imidazolin-2-iminato Titanium Complexes Containing Aryloxo Ligands and Their Catalytic Performance in the Polymerization of α-Olefins. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00117] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dana Shoken
- Schulich
Faculty of Chemistry, Institute of Catalysis Science and Technology, Technion-Israel Institute of Technology, Technion City, 32000 Haifa, Israel
| | - Linda J. W. Shimon
- Department
of Chemical Research Support, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Matthias Tamm
- Institut
für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Moris S. Eisen
- Schulich
Faculty of Chemistry, Institute of Catalysis Science and Technology, Technion-Israel Institute of Technology, Technion City, 32000 Haifa, Israel
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74
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Jiang ZH, Zhao JP, Ma XM, Bai SD. Crystal structure of bis( N- tert-butylbenzamidinium) hexachloridozirconate(IV) dichloromethane disolvate. Acta Crystallogr E Crystallogr Commun 2016; 72:432-5. [PMID: 27375857 PMCID: PMC4910352 DOI: 10.1107/s2056989016003030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 02/20/2016] [Indexed: 12/05/2022]
Abstract
In the crystal of the title complex salt, the amidinium cations and the centrosymmetric ZrIV complex anions are linked by N—H⋯Cl hydrogen bonds, forming a two-dimensional network extending along the b-axis direction. In the ZrIV complex anion of the title complex salt, [(C4H9)HNC(C6H5)NH2]2[ZrCl6]·2CH2Cl2, the ZrIV cation, located on an inversion centre, is coordinated by six Cl− anions in a distorted octahedral geometry with Zr—Cl distances in the range 2.433 (2)–2.4687 (19) Å; in the amidinium cation, the dihedral angle between the aromatic ring and [NCN] plane is 43.3 (4)°. In the crystal, the amidinium cations and [ZrCl6]2− anions are linked by N—H⋯Cl hydrogen bonds, forming a two-dimensional network extending along the b axis; two dichloromethane solvent molecules are linked by a pair of weak C—H⋯Cl hydrogen bonds, forming a centrosymmetric [CHCl]2 six-membered ring.
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75
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Chiarella GM, Murillo CA, Young MD. Soluble paramagnetic Ru26+ paddlewheels with alkyl-substituted bicyclic guanidinates. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.07.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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76
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Antiñolo A, Carrillo-Hermosilla F, Fernández-Galán R, Montero-Rama MP, Ramos A, Villaseñor E, Rojas RS, Rodríguez-Diéguez A. Dialkylboron guanidinates: syntheses, structures and carbodiimide de-insertion reactions. Dalton Trans 2016; 45:15350-15363. [DOI: 10.1039/c6dt02913b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solutions of some of the title compounds reached an equilibrium with the aminoboranes and the corresponding carbodiimides at room temperature.
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Affiliation(s)
- Antonio Antiñolo
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Departamento de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Ciencias y Tecnologías Químicas
- Universidad de Castilla-La Mancha
| | - Fernando Carrillo-Hermosilla
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Departamento de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Ciencias y Tecnologías Químicas
- Universidad de Castilla-La Mancha
| | - Rafael Fernández-Galán
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Departamento de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Ciencias y Tecnologías Químicas
- Universidad de Castilla-La Mancha
| | - María Pilar Montero-Rama
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Departamento de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Ciencias y Tecnologías Químicas
- Universidad de Castilla-La Mancha
| | - Alberto Ramos
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Departamento de Química Inorgánica
- Orgánica y Bioquímica
- Instituto Regional de Investigación Científica Aplicada
- Universidad de Castilla-La Mancha
| | - Elena Villaseñor
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Departamento de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Ciencias y Tecnologías Químicas
- Universidad de Castilla-La Mancha
| | - Rene S. Rojas
- Pontificia Universidad Católica de Chile
- Facultad de Química
- Santiago de Chile
- Chile
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77
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Lamb AC, Wang Z, Cook TM, Sharma B, Chen SJ, Lu Z, Steren CA, Lin Z, Xue ZL. Preparation of all N-coordinated zirconium amide amidinates and studies of their reactions with dioxygen and water. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.07.045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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78
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Peng D, Yan X, Yu C, Zhang S, Li X. Transition metal complexes bearing tridentate ligands for precise olefin polymerization. Polym Chem 2016. [DOI: 10.1039/c6py00040a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review covers key developments in the design of post-metallocene transition metal complexes (precatalysts) bearing tridentate chelating ligands and their application in olefin polymerization.
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Affiliation(s)
- Deqian Peng
- Key Laboratory of Cluster Science of Ministry of Education
- Department of Chemistry
- Beijing Institute of Technology
- Beijing
- China
| | - Xinwen Yan
- Key Laboratory of Cluster Science of Ministry of Education
- Department of Chemistry
- Beijing Institute of Technology
- Beijing
- China
| | - Chao Yu
- Key Laboratory of Cluster Science of Ministry of Education
- Department of Chemistry
- Beijing Institute of Technology
- Beijing
- China
| | - Shaowen Zhang
- Key Laboratory of Cluster Science of Ministry of Education
- Department of Chemistry
- Beijing Institute of Technology
- Beijing
- China
| | - Xiaofang Li
- Key Laboratory of Cluster Science of Ministry of Education
- Department of Chemistry
- Beijing Institute of Technology
- Beijing
- China
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79
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Sroor FM, Hrib CG, Liebing P, Hilfert L, Busse S, Edelmann FT. Five different types of η8-cyclooctatetraenyl-lanthanide half-sandwich complexes from one ligand set, including a “giant neodymium wheel”. Dalton Trans 2016; 45:13332-46. [DOI: 10.1039/c6dt01974a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using one ligand set, five different types of η8-cyclooctatetraenyl-lanthanide half-sandwich complexes, including a “giant neodymium wheel”, have been prepared and structurally characterized.
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Affiliation(s)
- Farid M. Sroor
- Organometallic and Organometalloid Chemistry Department
- National Research Centre
- 12622 Cairo
- Egypt
| | - Cristian G. Hrib
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- Universitätsplatz 2
- D-39106 Magdeburg
- Germany
| | - Phil Liebing
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- Universitätsplatz 2
- D-39106 Magdeburg
- Germany
| | - Liane Hilfert
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- Universitätsplatz 2
- D-39106 Magdeburg
- Germany
| | - Sabine Busse
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- Universitätsplatz 2
- D-39106 Magdeburg
- Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- Universitätsplatz 2
- D-39106 Magdeburg
- Germany
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80
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Peganova TA, Sinopalnikova IS, Peregudov AS, Fedyanin IV, Demonceau A, Ustynyuk NA, Kalsin AM. The half-sandwich 18- and 16-electron arene ruthenium iminophosphonamide complexes. Dalton Trans 2016; 45:17030-17041. [DOI: 10.1039/c6dt03202h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Novel arene ruthenium iminophosphonamides are electron-rich complexes due to a strong σ,π-donor zwitterionic ligand.
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Affiliation(s)
- Tat'yana A. Peganova
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Iana S. Sinopalnikova
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Alexander S. Peregudov
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Ivan V. Fedyanin
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Albert Demonceau
- Laboratory of Macromolecular Chemistry and Organic Catalysis
- Department of Chemistry
- University of Liège
- 4000 Liège
- Belgium
| | - Nikolai A. Ustynyuk
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Alexander M. Kalsin
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
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81
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Akpan ED, Ojwach SO, Omondi B, Nyamori VO. Zn(ii) and Cu(ii) formamidine complexes: structural, kinetics and polymer tacticity studies in the ring-opening polymerization of ε-caprolactone and lactides. NEW J CHEM 2016. [DOI: 10.1039/c5nj03159a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The flexibility of ligands and their coordination chemistry with metal centers provided effective catalysts in the ring opening polymerization of cyclic esters.
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Affiliation(s)
- Ekemini D. Akpan
- School of Chemistry and Physics
- Westville Campus
- University of KwaZulu-Natal
- Private Bag X54001
- Durban
| | - Stephen O. Ojwach
- School of Chemistry and Physics
- Pietermaritzburg Campus
- University of KwaZulu-Natal
- Private Bag X01
- Scottsville
| | - Bernard Omondi
- School of Chemistry and Physics
- Westville Campus
- University of KwaZulu-Natal
- Private Bag X54001
- Durban
| | - Vincent O. Nyamori
- School of Chemistry and Physics
- Westville Campus
- University of KwaZulu-Natal
- Private Bag X54001
- Durban
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82
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Francos J, González-Liste PJ, Menéndez-Rodríguez L, Crochet P, Cadierno V, Borge J, Antiñolo A, Fernández-Galán R, Carrillo-Hermosilla F. Half-Sandwich Guanidinate-Osmium(II) Complexes: Synthesis and Application in the Selective Dehydration of Aldoximes. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501221] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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83
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Kang X, Yamamoto A, Nishiura M, Luo Y, Hou Z. Computational Analyses of the Effect of Lewis Bases on Styrene Polymerization Catalyzed by Cationic Scandium Half-Sandwich Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00719] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaohui Kang
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, China
| | - Atsushi Yamamoto
- Organometallic
Chemistry Laboratory and Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Masayoshi Nishiura
- Organometallic
Chemistry Laboratory and Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yi Luo
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, China
| | - Zhaomin Hou
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, China
- Organometallic
Chemistry Laboratory and Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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85
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Márquez A, Ávila E, Urbaneja C, Álvarez E, Palma P, Cámpora J. Copper(I) Complexes of Zwitterionic Imidazolium-2-Amidinates, a Promising Class of Electroneutral, Amidinate-Type Ligands. Inorg Chem 2015; 54:11007-17. [PMID: 26517572 DOI: 10.1021/acs.inorgchem.5b02141] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first complexes containing imidazolium-2-amidinates as ligands (betaine-type adducts of imidazolium-based carbenes and carbodiimides, NHC-CDI) are reported. Interaction of the sterically hindered betaines ICyCDI(DiPP) and IMeCDI(DiPP) [both bearing 2,6-diisopropylphenyl (DiPP) substituents on the terminal N atoms] with Cu(I) acetate affords mononuclear, electroneutral complexes 1a and 1b, which contain NHC-CDI and acetate ligands terminally bound to linear Cu(I) centers. In contrast, the less encumbered ligand ICyCDI(p-Tol), with p-tolyl substituents on the nitrogen donor atoms, affords a dicationic trigonal paddlewheel complex, [Cu2(μ-ICyCDI(p-Tol))3](2+)[OAc(-)]2 (2-OAc). The nuclear magnetic resonance (NMR) resonances of this compound are broad and indicate that in solution the acetate anion and the betaine ligands compete for binding the Cu atom. Replacing the external acetate with the less coordinating tetraphenylborate anion provides the corresponding derivative 2-BPh4 that, in contrast with 2-OAc, gives rise to sharp and well-defined NMR spectra. The short Cu-Cu distance in the binuclear dication [Cu2(μ-ICyCDI(p-Tol))3](2+) observed in the X-ray structures of 2-BPh4 and 2-OAc, ca. 2.42 Å, points to a relatively strong "cuprophilic" interaction. Attempts to force the bridging coordination mode of IMeCDI(DiPP) displacing the acetate anion with BPh4(-) led to the isolation of the cationic mononuclear derivative [Cu(IMeCDI(DiPP))2](+)[BPh4](-) (3b) that contains two terminally bound betaine ligands. Compound 3b readily decomposes upon being heated, cleanly affording the bis-carbene complex [Cu(IMe)2](+)[BPh4(-)] (4) and releasing the corresponding carbodiimide (C(═N-DiPP)2).
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Affiliation(s)
- Astrid Márquez
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla , C/Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Elena Ávila
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla , C/Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Carmen Urbaneja
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla , C/Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla , C/Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Pilar Palma
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla , C/Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Juan Cámpora
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla , C/Américo Vespucio, 49, 41092 Sevilla, Spain
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86
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87
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Ryken SA, Schafer LL. N,O-Chelating Four-Membered Metallacyclic Titanium(IV) Complexes for Atom-Economic Catalytic Reactions. Acc Chem Res 2015; 48:2576-86. [PMID: 26247696 DOI: 10.1021/acs.accounts.5b00224] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Titanium, as the second most abundant transition metal in the earth's crust, lends itself as a sustainable and inexpensive resource in catalysis. Its nontoxicity and biocompatibility are also attractive features for handling and disposal. Titanium has excelled as a catalyst for a broad range of transformations, including ethylene and α-olefin polymerizations. However, many reactions relevant to fine chemical synthesis have preferrentially employed late transition metals, and reactive, inexpensive early transition metals have been largely overlooked. In addition to promising reactivity, titanium complexes feature more robust character compared with some other highly Lewis-acidic metals such as those found in the lanthanide series. Since the advent of modulating ligand scaffolds, titanium has found use in a growing variety of reactions as a versatile homogeneous catalyst. These catalytic transformations include hydrofunctionalization reactions (adding an element-hydrogen (E-H) bond across a C-C multiple bond), as well as the ring-opening polymerization of cyclic esters, all of which are atom-economic transformations. Our investigations have focused on tight bite angle monoanionic N,O-chelating ligands, forming four-membered metallacycles. These ligand sets, including amidates, ureates, pyridonates, and sulfonamidates, have flexible binding modes offering a range of stable and reactive intermediates necessary for catalytic activity. Additionally, the simple form of these ligands leads to easily prepared proligands, along with facile tuning of steric and electronic factors. A sterically bulky titanium amidate complex has proven to be a leading catalyst for the selective formation of anti-Markovnikov addition products via intermolecular hydroamination of terminal alkynes, while sterically less demanding titanium pyridonates have opened the path to the selective formation of amine substituted cycloalkanes via the intramolecular hydroaminoalkylation of aminoalkenes over the competing hydroamination pathway. Sulfonamidates have boosted reactivity for hydrofunctionalization and polymerization reactions compared with amide ligands not bearing a sulfonyl group. N,O-Chelated titanium complexes have been used to synthesize ultrahigh molecular weight polyethylene and have been utilized in the challenging task of realizing equal incorporation of two different cyclic esters in a random ring-opening copolymerization. These discrete complexes have allowed for careful study of fundamental coordination chemistry and stoichiometric organometallic investigations. With inexpensive starting materials and modular ligands, titanium N,O-chelated complexes are well-suited to address the challenges of achieving greener chemical processes while accessing useful reaction manifolds for sustainable synthesis.
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Affiliation(s)
- Scott A. Ryken
- 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
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88
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Zhang G, Wang S, Zhou S, Wei Y, Guo L, Zhu X, Zhang L, Gu X, Mu X. Synthesis and Reactivity of Rare-Earth-Metal Monoalkyl Complexes Supported by Bidentate Indolyl Ligands and Their High Performance in Isoprene 1,4-cis Polymerization. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00467] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guangchao Zhang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Shaowu Wang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People’s Republic of China
| | - Shuangliu Zhou
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Yun Wei
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Liping Guo
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Xiancui Zhu
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Lijun Zhang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Xiaoxia Gu
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Xiaolong Mu
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
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89
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Horrillo-Martinez P, Leitch DC, Ryken SA, Thomson RK, Beard JD, Patrick BO, Schafer LL, Giesbrecht GR. Titanium amidate complexes as active catalysts for the synthesis of high molecular weight polyethylene. CAN J CHEM 2015. [DOI: 10.1139/cjc-2015-0081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A series of titanium and zirconium bis(amidate) complexes of the type L2MX2, where L is an amidate ligand, and X is either –NMe2 or –Cl, were prepared in 60%–83% yield and fully characterized. Multiple binding motifs are observed as the amidate ligand can bind in κ1- and κ2-modes. These complexes were then subjected to screening the catalytic polymerization of ethylene. All catalysts, after reaction with suitable co-catalyst, were functional for ethylene polymerization, though not for the copolymerization of ethylene and longer linear 1-alkenes. Polyethylene was formed in the range of 1000–4000 kDa, and with PDI values as low as 1.3. These long polymeric chains are considered as ultra-high molecular weight polyethylene (UHMWPE).
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Affiliation(s)
| | - David C. Leitch
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Scott A. Ryken
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Robert K. Thomson
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - J. David Beard
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Brian O. Patrick
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Laurel L. Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
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90
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Lanthanide(III)-bis(cyclopropylethinylamidinates): Synthesis, structure, and catalytic activity. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.01.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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91
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Menéndez-Rodrı́guez L, Tomás-Mendivil E, Francos J, Crochet P, Cadierno V, Antiñolo A, Fernández-Galán R, Carrillo-Hermosilla F. Reactivity of the Dimer [{RuCl(μ-Cl)(η3:η3-C10H16)}2] (C10H16 = 2,7-Dimethylocta-2,6-diene-1,8-diyl) toward Guanidines: Access to Ruthenium(IV) and Ruthenium(II) Guanidinate Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00070] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lucı́a Menéndez-Rodrı́guez
- Laboratorio
de Compuestos Organometálicos y Catálisis (Unidad Asociada
al CSIC), Centro de Innovación en Quı́mica Avanzada
(ORFEO-CINQA), Departamento de Quı́mica Orgánica
e Inorgánica, Instituto Universitario de Quı́mica
Organometálica “Enrique Moles”, Facultad de Quı́mica, Universidad de Oviedo, Julián Claverı́a 8, E-33006 Oviedo, Spain
| | - Eder Tomás-Mendivil
- Laboratorio
de Compuestos Organometálicos y Catálisis (Unidad Asociada
al CSIC), Centro de Innovación en Quı́mica Avanzada
(ORFEO-CINQA), Departamento de Quı́mica Orgánica
e Inorgánica, Instituto Universitario de Quı́mica
Organometálica “Enrique Moles”, Facultad de Quı́mica, Universidad de Oviedo, Julián Claverı́a 8, E-33006 Oviedo, Spain
| | - Javier Francos
- Department
of Pure and Applied Chemistry, WestCHEM, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Pascale Crochet
- Laboratorio
de Compuestos Organometálicos y Catálisis (Unidad Asociada
al CSIC), Centro de Innovación en Quı́mica Avanzada
(ORFEO-CINQA), Departamento de Quı́mica Orgánica
e Inorgánica, Instituto Universitario de Quı́mica
Organometálica “Enrique Moles”, Facultad de Quı́mica, Universidad de Oviedo, Julián Claverı́a 8, E-33006 Oviedo, Spain
| | - Victorio Cadierno
- Laboratorio
de Compuestos Organometálicos y Catálisis (Unidad Asociada
al CSIC), Centro de Innovación en Quı́mica Avanzada
(ORFEO-CINQA), Departamento de Quı́mica Orgánica
e Inorgánica, Instituto Universitario de Quı́mica
Organometálica “Enrique Moles”, Facultad de Quı́mica, Universidad de Oviedo, Julián Claverı́a 8, E-33006 Oviedo, Spain
| | - Antonio Antiñolo
- Centro
de Innovación en Quı́mica Avanzada (ORFEO-CINQA),
Departamento de Quı́mica Inorgánica, Orgánica
y Bioquı́mica, Facultad de Ciencias y Tecnologı́as
Quı́micas-Campus de Ciudad Real, Universidad de Castilla-La Mancha, Campus
Universitario, E-13071 Ciudad Real, Spain
| | - Rafael Fernández-Galán
- Centro
de Innovación en Quı́mica Avanzada (ORFEO-CINQA),
Departamento de Quı́mica Inorgánica, Orgánica
y Bioquı́mica, Facultad de Ciencias y Tecnologı́as
Quı́micas-Campus de Ciudad Real, Universidad de Castilla-La Mancha, Campus
Universitario, E-13071 Ciudad Real, Spain
| | - Fernando Carrillo-Hermosilla
- Centro
de Innovación en Quı́mica Avanzada (ORFEO-CINQA),
Departamento de Quı́mica Inorgánica, Orgánica
y Bioquı́mica, Facultad de Ciencias y Tecnologı́as
Quı́micas-Campus de Ciudad Real, Universidad de Castilla-La Mancha, Campus
Universitario, E-13071 Ciudad Real, Spain
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92
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Sroor FM, Hrib CG, Hilfert L, Busse S, Edelmann FT. Synthesis and catalytic activity of homoleptic lanthanide-tris(cyclopropylethinyl)amidinates. NEW J CHEM 2015. [DOI: 10.1039/c5nj00555h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New unsolvated, homoleptic lanthanide(iii) tris(cyclopropylethinylamidinate) complexes of the type [c-C3H5–CC–C(NR)2]3Ln (R = iPr, cyclohexyl; Ln = Nd, Sm, Ho) have been prepared and the crystal structure of the holmium derivative [c-C3H5–CC–C(NiPr)2]3Ho has been confirmed by X-ray diffraction.
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Affiliation(s)
- Farid M. Sroor
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Cristian G. Hrib
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Liane Hilfert
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Sabine Busse
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
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93
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Kalden D, Krieck S, Görls H, Westerhausen M. 1,3-Bis(2,4,6-trimethylphenyl)triazenides of potassium, magnesium, calcium, and strontium. Dalton Trans 2015; 44:8089-99. [DOI: 10.1039/c5dt00595g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
1,3-Bis(2,4,6-trimethylphenyl)triazenide anions act as bidentate ligands toward s-block metals; in the calcium derivative π-stacking of the aromatic rings leads to additional stabilization of the complex.
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Affiliation(s)
- Diana Kalden
- Institute of Inorganic and Analytical Chemistry
- Friedrich Schiller University
- D-07743 Jena
- Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry
- Friedrich Schiller University
- D-07743 Jena
- Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry
- Friedrich Schiller University
- D-07743 Jena
- Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry
- Friedrich Schiller University
- D-07743 Jena
- Germany
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94
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Vrána J, Jambor R, Růžička A, Alonso M, De Proft F, Lyčka A, Dostál L. Reactivity of bis(organoamino)phosphanes with magnesium(ii) compounds. Dalton Trans 2015; 44:4533-45. [DOI: 10.1039/c4dt03929g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The reactivity of bis(organoamino)phosphanes with magnesium(ii) reagents is reported. The outcome of the reactions is influenced by a tautomeric H-shift in ligand backbones.
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Affiliation(s)
- Jan Vrána
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- CZ-532 10 Pardubice
- Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- CZ-532 10 Pardubice
- Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- CZ-532 10 Pardubice
- Czech Republic
| | - Mercedes Alonso
- Eenheid Algemene Chemie (ALGC)
- Vrije Universiteit Brussel (VUB) Pleinlaan 2
- B-1050 Brussels
- Belgium
| | - Frank De Proft
- Eenheid Algemene Chemie (ALGC)
- Vrije Universiteit Brussel (VUB) Pleinlaan 2
- B-1050 Brussels
- Belgium
| | - Antonín Lyčka
- Research Institute for Organic Syntheses
- CZ-533 54 Pardubice
- Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- CZ-532 10 Pardubice
- Czech Republic
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95
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Abstract
The current perspective will present the use of amidinate group 4 complexes in α-olefin polymerizations.
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Affiliation(s)
- Tatyana Elkin
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Haifa 32000
- Israel
| | - Moris S. Eisen
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Haifa 32000
- Israel
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96
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Du L, Chu W, Miao H, Xu C, Ding Y. Synthesis, characterization, thermal properties of silicon(iv) compounds containing guanidinato ligands and their potential as CVD precursors. RSC Adv 2015. [DOI: 10.1039/c5ra09755j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The title compounds of the type (Me3Si)2N–C(N′R)(–N′′RSiMe3) (with R = iPr or Cy) as potential CVD precursors have been synthesized and characterized by X-ray diffraction, 1H NMR, 13C NMR, 29Si NMR and elemental analysis where necessary.
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Affiliation(s)
- Liyong Du
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Wenxiang Chu
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Hongyan Miao
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Chongying Xu
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Yuqiang Ding
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
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97
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Lapenta R, Mazzeo M, Grisi F. Monoamidinate titanium complexes: highly active catalysts for the polymerization and copolymerization of l-lactide and ε-caprolactone. RSC Adv 2015. [DOI: 10.1039/c5ra15599a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
A series of titanium trichloroamidinate complexes with distinct ligand sets showed different abilities in the copolymerization of ε-caprolactone and l-lactide, producing copolymers ranging from gradient to truly random microstructures.
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Affiliation(s)
- Rosita Lapenta
- Department of Chemistry and Biology "Adolfo Zambelli"
- University of Salerno
- Salerno
- Italy
| | - Mina Mazzeo
- Department of Chemistry and Biology "Adolfo Zambelli"
- University of Salerno
- Salerno
- Italy
| | - Fabia Grisi
- Department of Chemistry and Biology "Adolfo Zambelli"
- University of Salerno
- Salerno
- Italy
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98
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Wang P, Li H, Xue X, Chen X. Inserted products of lithium silylquinolylamide dimers [{8-(2-R-C9H5N)N(Me3Si)}Li·OEt2]2 (R = H or Me) with dimethylcyanamide and their reactive derivatives with metal halides. Dalton Trans 2015; 44:4718-25. [DOI: 10.1039/c4dt03599b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Li, Ti, Fe and Co complexes bearing 8-quinolyl-linked guanidinate ligands have been synthesized and characterized. The structures of all complexes show various coordinative modes with the same multi-dentate ligands.
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Affiliation(s)
- Peng Wang
- School of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan
- China
| | - Haifen Li
- School of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan
- China
| | - Xiaoyan Xue
- School of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan
- China
| | - Xia Chen
- School of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan
- China
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99
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Cibian M, Langis‐Barsetti S, De Mendonça FG, Touaibia S, Derossi S, Spasyuk D, Hanan GS. Influence of Ligand Substitution Pattern on Structure in Cobalt(II) Complexes of Bulky
N
,
N′
‐Diarylformamidinate
N
‐Oxides. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402895] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mihaela Cibian
- Département de Chimie, Université de Montréal, 2900 Edouard‐Montpetit, Montréal, Québec, H3T‐1J4, Canada, http://www.groupeenergieverte.com/
| | - Sophie Langis‐Barsetti
- Département de Chimie, Université de Montréal, 2900 Edouard‐Montpetit, Montréal, Québec, H3T‐1J4, Canada, http://www.groupeenergieverte.com/
| | - Fernanda Gomes De Mendonça
- Département de Chimie, Université de Montréal, 2900 Edouard‐Montpetit, Montréal, Québec, H3T‐1J4, Canada, http://www.groupeenergieverte.com/
| | - Sammy Touaibia
- Département de Chimie, Université de Montréal, 2900 Edouard‐Montpetit, Montréal, Québec, H3T‐1J4, Canada, http://www.groupeenergieverte.com/
| | - Sofia Derossi
- Département de Chimie, Université de Montréal, 2900 Edouard‐Montpetit, Montréal, Québec, H3T‐1J4, Canada, http://www.groupeenergieverte.com/
| | - Denis Spasyuk
- Département de Chimie, Université de Montréal, 2900 Edouard‐Montpetit, Montréal, Québec, H3T‐1J4, Canada, http://www.groupeenergieverte.com/
| | - Garry S. Hanan
- Département de Chimie, Université de Montréal, 2900 Edouard‐Montpetit, Montréal, Québec, H3T‐1J4, Canada, http://www.groupeenergieverte.com/
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100
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Hafeez M, Lippert S, Bauer T, Kretschmer WP. Synthesis, structural investigations and ethylene polymerization of titanium complexes with tripodal oxazoline ligands. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2014. [DOI: 10.1007/s13738-014-0558-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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