1
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Ghosh M, Parvin N, Panwaria P, Tothadi S, Bakthavatsalam R, Therambram A, Khan S. Diverse structural reactivity patterns of a POCOP ligand with coinage metals. Dalton Trans 2024; 53:7763-7774. [PMID: 38619861 DOI: 10.1039/d3dt03921h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
We have utilised the 4,6-di-tert-butyl resorcinol bis(diphenylphosphinite) (POCOP) ligand for exploring its coordination ability towards group 11 metal centres. The treatment of the bidentate ligand 1 with various coinage metal precursors afforded a wide range of structurally diverse complexes 2-12, depending upon the metal precursors used. This furnishes several multinuclear Cu(I) complexes with dimeric (2) and tetrameric cores (3, 4, and 5). The tetrameric stairstep complex 4 shows thermochromic behaviour, whereas the dimeric complex 2 and tetrameric complex 3 show luminescence properties at cryogenic temperatures. Interestingly, the halide substitution reaction of the dimeric complex 2 with KPPh2 produces a unique mixed phosphine-based tetrameric Cu(I) complex, 5. Treatment of the POCOP ligand with [CuBF4(CH3CN)4] in the presence of 2,2'-bipyridine afforded heteroleptic complex 6, consisting of tri- and tetra-coordinated cationic Cu(I) centres. Furthermore, we could also isolate cubane (8) and stairstep (9) complexes of Ag(I). The cationic Au(I) complex (12) was obtained from the dinuclear Au(I) complex of POCOP, 11. Complex 12 revealed the presence of a strong intramolecular aurophilic interaction with an Au⋯Au bond distance of 3.1143(9) Å. Subsequently, the photophysical properties of these complexes have been studied. All the complexes were characterised by single-crystal X-ray diffraction studies, routine NMR techniques, and mass spectroscopy.
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Affiliation(s)
- Moushakhi Ghosh
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Nasrina Parvin
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Prakash Panwaria
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Srinu Tothadi
- CSIR-Central Salt and Marine Chemicals Research Institute, Gijub Badheka Marg, Bhavnagar 364002, India
| | - Rangarajan Bakthavatsalam
- Department of Chemistry, Indian Institute of Science Education and Research Tirupati, Srinivasapuram-Jangalapalli Village, Tirupati 517619, India
| | - Arshad Therambram
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Shabana Khan
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
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2
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Rodríguez-Arce E, Gavrilov E, Alvite X, Nayeem N, León IE, Neary MC, Otero L, Gambino D, Olea Azar C, Contel M. 5-Nitrofuryl-Containing Thiosemicarbazone Gold(I) Compounds: Synthesis, Stability Studies, and Anticancer Activity. Chempluschem 2023; 88:e202300115. [PMID: 37191319 PMCID: PMC10651801 DOI: 10.1002/cplu.202300115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/21/2023] [Indexed: 05/17/2023]
Abstract
This work describes the synthesis of four gold(I) [AuClL] compounds containing chloro and biologically active protonated thiosemicarbazones based on 5-nitrofuryl (L=HSTC). The stability of the compounds in dichloromethane, DMSO, and DMSO/culture media solutions was investigated by spectroscopy, cyclic voltammetry, and conductimetry, indicating the formation overtime of cationic monometallic [Au(HTSC)(DMSO)]± or [Au(HTSC)2 ]± , and/or dimeric species. Neutral [{Au(TSC)}2 ] species were obtained from one of the compounds in dichlomethane/n-hexane solution and characterized by X-ray crystallography revealing a Au-Au bond, and deprotonated thiosemicarbazone (TSC). The cytotoxicity of the gold compounds and thiosemicarbazone ligands was evaluated against selected cancer cell lines and compared to that of Auranofin. Studies of the most stable, cytotoxic, and selective compound on a renal cancer cell line (Caki-1) demonstrated its relevant antimigratory and anti-angiogenic properties, and preferential accumulation in the cell nuclei. Its mode of action seems to involve interaction with DNA, and subsequent cell death via apoptosis.
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Affiliation(s)
- Esteban Rodríguez-Arce
- Departamento de Química Inorgánica y Analítica, Universidad de Chile, Casilla 233, Santiago, Chile
- Department of Chemistry and Brooklyn College Cancer Center, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800, Montevideo, Uruguay
| | - Eric Gavrilov
- Department of Chemistry and Brooklyn College Cancer Center, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA
| | - Ximena Alvite
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800, Montevideo, Uruguay
| | - Nazia Nayeem
- Department of Chemistry and Brooklyn College Cancer Center, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA
- Biology, Biochemistry, and Chemistry PhD Programs, The Graduate Center, The City University of New York, New York, NY, 10016, USA
| | - Ignacio E León
- Department of Chemistry and Brooklyn College Cancer Center, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA
- CEQUINOR (CCT-CONICET La Plata, Asociado a CIC), Departamento de Química, Universidad Nacional de La Plata, Blvd. 120 N° 1465, La Plata, 1900, Argentina
| | - Michelle C Neary
- Chemistry Department, Hunter College, The City University of New York, New York, NY, 10065, USA
| | - Lucía Otero
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800, Montevideo, Uruguay
| | - Dinorah Gambino
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800, Montevideo, Uruguay
| | - Claudio Olea Azar
- Departamento de Química Inorgánica y Analítica, Universidad de Chile, Casilla 233, Santiago, Chile
| | - María Contel
- Department of Chemistry and Brooklyn College Cancer Center, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA
- Biology, Biochemistry, and Chemistry PhD Programs, The Graduate Center, The City University of New York, New York, NY, 10016, USA
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3
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Paskaruk KM, Emslie DJH, Britten JF. A comparison of the coordination behaviour of R 2PCH 2BMe 2 (R = Me vs. Ph) ambiphilic ligands with late transition metals. Dalton Trans 2023; 52:15712-15724. [PMID: 37815843 DOI: 10.1039/d3dt02538a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
A new synthesis that avoids the use of Me2PH is reported for (Me2PCH2BMe2)2, and this method was extended to the synthesis of (Ph2PCH2BMe2)2. The ligand precursor (Me2PCH2BMe2)2 did not react with [{M(μ-Cl)(cod)}2] (cod = 1,5-cyclooctadiene; M = Ir and Rh) or [PtCl2(cod)] at room temperature. However, after 12-48 hours at 65-70 °C, these reactions afforded (a) [Ir(cod)(μ-Cl)(Me2PCH2BMe2)] (1), (b) an equilibrium mixture of (Me2PCH2BMe2)2, [{Rh(μ-Cl)(cod)}2] and [Rh(cod)(μ-Cl)(Me2PCH2BMe2)] (2), and (c) cis-[Pt(μ-Cl)2(Me2PCH2BMe2)2] (3), respectively. By contrast, reactions between the phenyl-substituted analogue, (Ph2PCH2BMe2)2, and [{M(μ-Cl)(cod)}2] (cod = 1,5-cyclooctadiene; M = Ir and Rh) proceeded over the course of 1 hour at 20 °C to generate [M(cod)(μ-Cl)(Ph2PCH2BMe2)] (M = Ir (4) and Rh (5)), indicative of room temperature (Ph2PCH2BMe2)2 dissociation. Room temperature reactions of (Ph2PCH2BMe2)2 with [{Rh(μ-Cl)(coe)2}2] (coe = cyclooctene) using a 1 : 1 or 3 : 1 stoichiometry also afforded [{Rh(coe)(μ-Cl)(Ph2PCH2BMe2)}2] (6) or [RhCl(Ph2PCH2BMe2)3] (7), respectively, where the latter is a borane-appended analogue of Wilkinson's catalyst, and reactions of (Ph2PCH2BMe2)2 with [PtX2(cod)] (X = Cl or Me) yielded cis-[Pt(μ-Cl)2(Ph2PCH2BMe2)2] (8) and cis-[PtMe2(Ph2PCH2BMe2)2] (9). Compounds 1-9, (Me2PCH2BMe2)2 and (Ph2PCH2BMe2)2 were crystallographically characterized. In compounds 1-5 and 8, each chloride co-ligand is coordinated by the borane of an R2PCH2BMe2 ligand. Additionally, in the solid state structure of 6, each bridging chloride ligand interacts weakly with a pendent borane, and in 7, the chloride ligand is tightly coordinated to the borane of one Ph2PCH2BMe2 ligand and weakly coordinated to the borane of a second Ph2PCH2BMe2 ligand. By contrast, both boranes in 9 (and one of the three boranes in 7) are non-coordinated.
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Affiliation(s)
- Katia M Paskaruk
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1, Canada.
| | - David J H Emslie
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1, Canada.
| | - James F Britten
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1, Canada.
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4
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Raju S, Singh HB, Kumar S, Butcher RJ. Coordination Behavior of the Tellurium Incorporated Mercuraazametallamacrocycle and Investigation of d 10 ⋅⋅⋅d 10 Interactions between Closed Shell (Ag + Hg 2+ ) Metal Ions. Chemistry 2023; 29:e202301322. [PMID: 37317647 DOI: 10.1002/chem.202301322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/06/2023] [Accepted: 06/14/2023] [Indexed: 06/16/2023]
Abstract
Herein, a new tellurium and mercury containing mercuraazametallamacrocycle has been prepared via (2+2) condensation of bis(o-aminophenyl)telluride and bis(o-formylphenyl)mercury(II). The isolated bright yellow solid of mercuraazametallamacrocycle has adopted unsymmetrical figure-of-eight conformation in the crystal structure. To study the metallophilic interactions between closed shell metal ions, the macrocyclic ligand has been treated with two equiv. of AgOTf (OTf=trifluoromethansulfonate) and AgBF4 , which afforded greenish-yellow bimetallic silver complexes. The isolated silver complexes displayed intramolecular Hg⋅⋅⋅Ag, Te⋅⋅⋅Ag interactions as well as intermolecular Hg⋅⋅⋅Hg interactions and formed an extended 1D molecular chain by directing six atoms to interact as TeII ⋅⋅⋅AgI ⋅⋅⋅HgII ⋅⋅⋅HgII ⋅⋅⋅AgI ⋅⋅⋅TeII in a non linear fashion. The Hg⋅⋅⋅Ag, Te⋅⋅⋅Ag interactions have also been studied in solution by 199 Hg, 125 Te NMR spectroscopy, absorption, and emission spectroscopy. In DFT calculations, the Atom in Molecule (AIM) analysis, non-covalent interactions (NCI), natural bonding orbital (NBO) analysis strongly supported for experimental evidences and revealed that the intermolecular Hg⋅⋅⋅Hg interaction is stronger than the intramolecular Hg⋅⋅⋅Ag interactions.
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Affiliation(s)
- Saravanan Raju
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, Maharashtra, India
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal Bhauri By-pass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Harkesh B Singh
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, Maharashtra, India
| | - Sangit Kumar
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal Bhauri By-pass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Ray J Butcher
- Department of Chemistry, Howard University, Washington, D.C., 20059, USA
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5
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Flecken F, Knapp A, Grell T, Dreßler C, Hanf S. Acute Bite Angle POP- and PSP-Type Ligands and Their Trinuclear Copper(I) Complexes: Synthesis and Photo-Luminescence Properties. Inorg Chem 2023; 62:13038-13049. [PMID: 37535941 DOI: 10.1021/acs.inorgchem.3c01865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
In the current work, the rational synthesis of trinuclear copper complexes, incorporating acute bite angle POP- and PSP-type ligands, is reported. The in situ formation of POP (Ph2P-O-PPh2) or PSP (Ph2P-S-PPh2) ligands in the presence of a copper(I) precursor gave access to various trinuclear copper complexes of the form [Cu3(μ3-Hal)2(μ-PXP)3]PF6 [X = O; Hal = Cl (1), Br (2), I (3) and X = S; Hal = Cl (5), Br (6), I (7)]. Related iodide-containing complexes and clusters, such as [Cu4(μ3-I)4(Ph2PI)4] (4) and [Cu3(μ3-I)2(μ-I)(μ-PSP)2] (8), could also be obtained via the variation of the reaction stoichiometry. The investigation of the photo-optical properties by photo-luminescence spectroscopy has demonstrated that the phosphorescence in the visible region can be switched off through the mere change of the heteroatom in the ligand backbone (POP vs PSP ligand scaffold). Theoretical studies have been conducted to complement the experimental photo-optical data with detailed insights into the occurring electronic transitions. Consequently, this systematic study paves the way for tuning the photo-optical properties of transition metal complexes in a more rational way.
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Affiliation(s)
- Franziska Flecken
- Institute for Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131 Karlsruhe, Germany, Mail:
| | - Anna Knapp
- Institute for Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131 Karlsruhe, Germany, Mail:
| | - Toni Grell
- Dipartimento di Chimica, Università degli Studi di Milano, Via Camillo Golgi 19, 20133 Milano, Italy
| | - Christian Dreßler
- Institute of Physics, Ilmenau University of Technology, Weimarer Straße 32, 98693 Ilmenau, Germany
| | - Schirin Hanf
- Institute for Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131 Karlsruhe, Germany, Mail:
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6
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Aurophilic Interactions of Dimeric Bisphosphine Gold(I) Complexes Pre-Organized by the Structure of the 1,5-Diaza-3,7-Diphosphacyclooctanes. INORGANICS 2022. [DOI: 10.3390/inorganics10120224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The dimeric gold(I) chloride and gold(I) iodide complexes ([L2Au]Cl2 and L2AuI2) on the scaffold of the cyclic bisphosphine, namely 1,5-diaza-3,7-diphosphacyclooctane containing α-phenylbenzyl (benzhydryl) substituents at the nitrogen atoms, were synthesized. The obtained complexes were isolated as white crystalline powders. The single crystal XRD of the obtained complexes revealed the strong aurophilic interactions between two gold(I) atoms with the Au…Au distance values of 2.9977(6) and 3.1680(5) Å. The comparison of the gold complexes, based on the N,N-diaryl- and N,N-dibenzhydryl substituted 1,5-diaza-3,7-diphosphacyclooctanes, allowed to reveal the strong impact of the initial heterocycle conformation on the realization of the aurophilic interactions, where the geometry of N,N-dibenzhydryl substituted 1,5-diaza-3,7-diphosphacyclooctane, is pre-organized for the intramolecular aurophilic interactions of the complexes. The obtained complexes exhibit a bluish-green phosphorescence (λem 505 (-Cl) and 530(-I)) in the solid state at room temperature, originated by the metal-halide centered transitions, which was confirmed by the TDDFT calculations. It was found that the aurophilic interactions are realized in the ground and in the triplet excited states of the complexes. The slighter change of the geometry of the N,N-dibenzhydryl substituted gold(I) iodide complexes, under the transition from the ground state to the excited state, in comparison with their N,N-diaryl substituted analogues, results in the reduced values of the Stokes shift of luminescence (ca. 150 nm vs. 175 nm).
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7
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Smith MB. The Backbone of Success of P,N-Hybrid Ligands: Some Recent Developments. Molecules 2022; 27:6293. [PMID: 36234830 PMCID: PMC9614609 DOI: 10.3390/molecules27196293] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 09/21/2022] [Accepted: 09/21/2022] [Indexed: 12/03/2022] Open
Abstract
Organophosphorus ligands are an invaluable family of compounds that continue to underpin important roles in disciplines such as coordination chemistry and catalysis. Their success can routinely be traced back to facile tuneability thus enabling a high degree of control over, for example, electronic and steric properties. Diphosphines, phosphorus compounds bearing two separated PIII donor atoms, are also highly valued and impart their own unique features, for example excellent chelating properties upon metal complexation. In many classical ligands of this type, the backbone connectivity has been based on all carbon spacers only but there is growing interest in embedding other donor atoms such as additional nitrogen (-NH-, -NR-) sites. This review will collate some important examples of ligands in this field, illustrate their role as ligands in coordination chemistry and highlight some of their reactivities and applications. It will be shown that incorporation of a nitrogen-based group can impart unusual reactivities and important catalytic applications.
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Affiliation(s)
- Martin B Smith
- Department of Chemistry, Loughborough University, Loughborough, Leics LE11 3TU, UK
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8
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Mandal D, Kumar A, Patil NT. Gold catalysis in organic synthesis: fifteen years of research in India. PROCEEDINGS OF THE INDIAN NATIONAL SCIENCE ACADEMY 2022. [DOI: 10.1007/s43538-022-00106-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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9
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Tanase T, Nakamae K, Ura Y, Nakajima T. Fine tunable metal assemblies constrained by multidentate phosphine ligands. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214581] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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10
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Flecken F, Grell T, Hanf S. Transition metal complexes of the PPO/POP ligand: variable coordination chemistry and photo-luminescence properties. Dalton Trans 2022; 51:8975-8985. [PMID: 35582983 DOI: 10.1039/d2dt01091g] [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
In the current work the tautomeric equilibrium between tetraphenyldiphosphoxane (Ph2P-O-PPh2, POP) and tetraphenyldiphosphine monoxide (Ph2P-P(O)Ph2, PPO) in the absence and presence of transition metal precursors is investigated. Whereas with hard transition metal ions, such as Fe(II) and Y(III), PPO-type complexes, such as [FeCl2(PPO)2] (1) and [YCl3(THF)2(PPO)] (2), are formed, softer transition metals ions tend to form so-called coordination stabilised tautomers of the POP ligand form, such as [Cu2(MeCN)3(μ2-POP)2](PF6)2 (3), [Au2Cl2(μ2-POP)] (4), and [Au2(μ2-POP)2](OTf)2 (5). The photo-optical properties of the PPO- and POP-type transition metal complexes are investigated experimentally using photo-luminescence spectroscopy, whereby the presence of metallophillic interactions was found to play a crucial role. The dinuclear copper complex [Cu2(MeCN)3(μ2-POP)2](PF6)2 (3) shows a very interesting thermochromic behavior and intense photo-luminescence with remarkable phosphoresence lifetimes at 77 K, which can probably be attributed to short intramolecular Cu-Cu distances.
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Affiliation(s)
- Franziska Flecken
- Institute for Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131 Karlsruhe, Germany.
| | - Toni Grell
- Dipartimento di Chimica, Università degli Studi di Milano, Via Camillo Golgi 19, 20131 Milano, Italy
| | - Schirin Hanf
- Institute for Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131 Karlsruhe, Germany.
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11
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Nazish M, Bai H, Legendre CM, Herbst-Irmer R, Zhao L, Stalke D, Roesky HW. A neutral vicinal silylene/phosphane supported six-membered C 2PSiAu 2 ring and a silver( i) complex. Chem Commun (Camb) 2022; 58:12704-12707. [DOI: 10.1039/d2cc04163d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on the hybrid bidentate silylene and phosphane ligand (1) stabilized Au which are capable of forming a gold containing six-membered ring (2). 2 exhibits an intramolecular aurophilic interaction, which is supported by DFT calculations.
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Affiliation(s)
- Mohd Nazish
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, Göttingen, 37077, Germany
| | - Han Bai
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Christina M. Legendre
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, Göttingen, 37077, Germany
| | - Regine Herbst-Irmer
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, Göttingen, 37077, Germany
| | - Lili Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Dietmar Stalke
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, Göttingen, 37077, Germany
| | - Herbert W. Roesky
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, Göttingen, 37077, Germany
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12
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Ghosh M, Khan S. N-Heterocyclic silylenes in coinage metal chemistry: an account of recent advances. Dalton Trans 2021; 50:10674-10688. [PMID: 34236058 DOI: 10.1039/d1dt01955d] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article intends to highlight and comprehensively summarize the recent developments in the field of silylene-coinage metal chemistry. Recent years have witnessed exponential growth in the utilization of N-heterocyclic silylenes as ligands in transition metal chemistry. Still, silylene-coinage metal complexes have only started to appear very recently. Particular attention is focused on the synthetic approaches to silylene-coinage metal complexes and their unusual properties derived from the spectroscopic and crystallographic data. Recent studies have demonstrated that silylene-coinage metal complexes exhibit catalytic efficiency towards hydrosilylation, copper-catalyzed alkyne azide cycloaddition (CuAAC), and glycosidation reactions. Although the chemistry of silylene-coinage metal complexes has only begun to blossom, these findings justify the need for a review at this stage of development. This article will summarize the previous work on silylene-coinage metal complexes followed by recent advances and conclude with future possibilities.
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Affiliation(s)
- Moushakhi Ghosh
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr Homi Bhaba Road, Pashan, Pune, 411008, India.
| | - Shabana Khan
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr Homi Bhaba Road, Pashan, Pune, 411008, India.
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13
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Goetzfried SK, Koenig SMC, Gallati CM, Gust R. Internal and External Influences on Stability and Ligand Exchange Reactions in Bromido[3-ethyl-4-aryl-5-(2-methoxypyridin-5-yl)-1-propyl-1,3-dihydro-2 H-imidazol-2-ylidene]gold(I) Complexes. Inorg Chem 2021; 60:8546-8553. [PMID: 34097405 PMCID: PMC8277168 DOI: 10.1021/acs.inorgchem.1c00325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The ligand scrambling
reaction of gold(I) complexes is a phenomenon
occurring primarily in L–AuI–X (L = phosphine, N-heterocyclic carbene (NHC), and thiol; X = halide and
thiol) complexes and has been observed among others for e.g., the
bromido[3-ethyl-4-(4-methoxyphenyl)-5-(2-methoxypyridin-5-yl)-1-propyl-1,3-dihydro-2H-imidazol-2-ylidene]gold(I) complex (7a),
which underwent ligand rearrangement in aqueous solutions. In this
study, we investigated the influence of substituents on the 4-aryl
ring of the related (NHC)AuIBr complexes (1a–9a) in terms of the conversion to the [(NHC)2AuI]+ (1b–9b) and [(NHC)2AuIIIBr2]+ (1c–9c) species. Furthermore,
the influence of external factors such as solvent, temperature, concentration,
and presence of halides (Cl–, Br–, and I–) or hydroxyl ions was studied to gain
a deeper understanding of the ligand rearrangement reaction. The substituent
on the 4-aryl ring has a marginal impact on the scrambling reaction.
Out of the investigated organic solvents (dimethylformamide (DMF),
dimethyl sulfoxide (DMSO), ethanol (EtOH), methanol (MeOH), and acetonitrile
(ACN)), only ACN separates single complex molecules. In all other
solvents, relatively stable ((NHC)AuIBr)2 dimers
are present. The addition of water to ACN solutions forces the formation
of such dimeric units, starting the transformation to [(NHC)2AuI]+ and [(NHC)2AuIIIBr2]+. The rate-determining step is the release
of Br– from a T-shape intermediate because an excess
of KBr terminates this reaction. Furthermore, it is obvious that only
single molecules react with halides. The aurophilic interactions between
two (NHC)AuIBr molecules are too strong in the presence
of water and largely impeded reaction with halides. As a single molecule,
the reaction with Cl– (e.g., in a 0.9% NaCl solution)
is notable, while I– even leads to a fast and quantitative
conversion to (NHC)AuII and finally to [(NHC)2AuI]+. Internal
and external factors of the ligand scrambling reaction
in (NHC)AuIBr complexes were investigated by the means
of HPLC. The data represent the impact of substituents, temperature,
solvent, concentration and addition of halides on the conversion to
the respective [(NHC)2AuI]+ and the
oxidation to the [(NHC)2AuIIIBr2]+ complexes.
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Affiliation(s)
- Sina Katharina Goetzfried
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck A-6020, Austria
| | - Sophie Marie Charlotte Koenig
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck A-6020, Austria
| | - Caroline Marie Gallati
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck A-6020, Austria
| | - Ronald Gust
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck A-6020, Austria
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14
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Sheikh KUN, Amin H, Haque RA, Abdul Majid AS, Yaseen M, Iqbal MA. An overview of synthetic methodologies of organometallic and coordination compounds of gold. J COORD CHEM 2021. [DOI: 10.1080/00958972.2020.1866176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - Hira Amin
- Department of Chemistry, University of Agriculture, Faislababd, Pakistan
| | - Rosenani A Haque
- School of Chemical Science, Universiti Sains Malaysia, Penang, Malaysia
| | | | - Muhammad Yaseen
- Department of Chemistry, Division of Science & Technology, University of Education, Lahore, Pakistan
| | - Muhammad Adnan Iqbal
- Department of Chemistry, University of Agriculture, Faislababd, Pakistan
- Organometallic & Coordination Chemistry Laboratory, University of Agriculture, Faislababd, Pakistan
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15
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Abstract
This review summarizes the recent achievements of dinuclear gold-catalyzed redox coupling, asymmetric catalysis and photocatalysis. The dinuclear gold catalysts show a better catalytic performance than the mononuclear gold catalysts in certain cases.
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Affiliation(s)
- Wenliang Wang
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Cheng-Long Ji
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Kai Liu
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Chuan-Gang Zhao
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Weipeng Li
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Jin Xie
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
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16
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Goetzfried SK, Gallati CM, Cziferszky M, Talmazan RA, Wurst K, Liedl KR, Podewitz M, Gust R. N-Heterocyclic Carbene Gold(I) Complexes: Mechanism of the Ligand Scrambling Reaction and Their Oxidation to Gold(III) in Aqueous Solutions. Inorg Chem 2020; 59:15312-15323. [PMID: 33006470 PMCID: PMC7581288 DOI: 10.1021/acs.inorgchem.0c02298] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
![]()
N-Heterocyclic carbene (NHC) gold(I) complexes offer great
prospects in medicinal chemistry as antiproliferative, anticancer,
and antibacterial agents. However, further development requires a
thorough understanding of their reaction behavior in aqueous media.
Herein, we report the conversion of the bromido[3-ethyl-4-(4-methoxyphenyl)-5-(2-methoxypyridin-5-yl)-1-propylimidazol-2-ylidene]gold(I)
((NHC)AuIBr, 1) complex in acetonitrile/water
mixtures to the bis[3-ethyl-4-(4-methoxyphenyl)-5-(2-methoxypyridin-5-yl)-1-propylimidazol-2-ylidene]gold(I)
([(NHC)2AuI]+, 7), which
is subsequently oxidized to the dibromidobis[3-ethyl-4-(4-methoxyphenyl)-5-(2-methoxypyridin-5-yl)-1-propylimidazol-2-ylidene]gold(III)
([(NHC)2AuIIIBr2]+, 9). By combining experimental data from HPLC, NMR, and (LC-)/HR-MS
with computational results from DFT calculations, we outline a detailed
ligand scrambling reaction mechanism. The key step is the formation
of the stacked ((NHC)AuIBr)2 dimer (2) that rearranges to the T-shaped intermediate Br(NHC)2AuI–AuIBr (3). The dissociation
of Br– from 3 and recombination lead
to (NHC)2AuI–AuIBr2 (5) followed by the separation into [(NHC)2AuI]+ (7) and [AuIBr2]− (8). [AuIBr2]− is not stable in an aqueous environment
and degrades in an internal redox reaction to Au0 and Br2. The latter in turn oxidizes 7 to the gold(III)
species 9. The reported ligand rearrangement of the (NHC)AuIBr complex differs from that found for related silver(I) analogous.
A detailed understanding of this scrambling mechanism is of utmost
importance for the interpretation of their biological activity and
will help to further optimize them for biomedical and other applications. By means of experimental data from HPLC
and (LC-)MS in combination with DFT calculations, we present a detailed
mechanism for the ligand scrambling reaction of (NHC)AuIBr to the corresponding [(NHC)2AuI]+ complex and the oxidation to the [(NHC)2AuIIIBr2]+ species in aqueous solutions.
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Affiliation(s)
- Sina K Goetzfried
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck, Tyrol 6020, Austria
| | - Caroline M Gallati
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck, Tyrol 6020, Austria
| | - Monika Cziferszky
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck, Tyrol 6020, Austria
| | - Radu A Talmazan
- Institute of General, Inorganic and Theoretical Chemistry, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck, Tyrol 6020, Austria
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical Chemistry, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck, Tyrol 6020, Austria
| | - Klaus R Liedl
- Institute of General, Inorganic and Theoretical Chemistry, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck, Tyrol 6020, Austria
| | - Maren Podewitz
- Institute of General, Inorganic and Theoretical Chemistry, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck, Tyrol 6020, Austria
| | - Ronald Gust
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck, Tyrol 6020, Austria
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17
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Pandey MK, Kunchur HS, Mondal D, Radhakrishna L, Kote BS, Balakrishna MS. Rare Au···H Interactions in Gold(I) Complexes of Bulky Phosphines Derived from 2,6-Dibenzhydryl-4-methylphenyl Core. Inorg Chem 2020; 59:3642-3658. [DOI: 10.1021/acs.inorgchem.9b03207] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Madhusudan K. Pandey
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - Harish S. Kunchur
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - Dipanjan Mondal
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - Latchupatula Radhakrishna
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - Basvaraj S. Kote
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - Maravanji S. Balakrishna
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
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18
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Osawa M, Soma S, Hoshino M, Tanaka Y, Akita M. Photoluminescent properties and molecular structures of dinuclear gold(i) complexes with bridged diphosphine ligands: near-unity phosphorescence from 3XMMCT/3MC. Dalton Trans 2020; 49:15204-15212. [DOI: 10.1039/d0dt03144e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Dinuclear gold(i) complexes with bridged diphosphine ligands display near-unity phosphorescence in the crystalline state at room-temperature.
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Affiliation(s)
- Masahisa Osawa
- Department of Applied Chemistry
- Nippon Institute of Technology
- Miyashiro-Machi
- Japan
| | - Sakie Soma
- Department of Applied Chemistry
- Nippon Institute of Technology
- Miyashiro-Machi
- Japan
| | - Mikio Hoshino
- Department of Applied Chemistry
- Nippon Institute of Technology
- Miyashiro-Machi
- Japan
| | - Yuya Tanaka
- Laboratory for Chemistry and Life Science Institute of Innovative Research
- Tokyo Institute of Technology R1-27
- Yokohama 226-8503
- Japan
| | - Munetaka Akita
- Laboratory for Chemistry and Life Science Institute of Innovative Research
- Tokyo Institute of Technology R1-27
- Yokohama 226-8503
- Japan
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19
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Kathewad N, Kumar N, Dasgupta R, Ghosh M, Pal S, Khan S. The syntheses and photophysical properties of PNP-based Au(i) complexes with strong intramolecular AuAu interactions. Dalton Trans 2019; 48:7274-7280. [PMID: 30762852 DOI: 10.1039/c8dt04471f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we report the syntheses, X-ray structures and photophysical studies of the dinuclear dimeric gold(i) complexes [ClAu(C6H5N)(PPh2)2]2 (1), [Au(C6H5N)(PPh2)2]2[SbF6]2 (2) and [Au(2,6-Me2C6H3N)(PPh2)2]2[SbF6]2 (4). We have used ligands with different substituents to see the effect of the substituents on the photophysical properties. All these complexes feature strong intramolecular AuAu interactions (2.7987-3.0056 Å) and were found to exhibit excellent luminescence properties with high quantum yields as well as different colors of emission.
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Affiliation(s)
- Neha Kathewad
- Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pashan, Pune 411 008, India.
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20
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Tanase T, Tanaka M, Hamada M, Morita Y, Nakamae K, Ura Y, Nakajima T. Alloyed Tetranuclear Metal Chains of Pd
4−
n
Pt
n
(
n=
0–3) Scaffolded by a New Linear Tetraphosphine Containing a PNP Bridge. Chemistry 2019; 25:8219-8224. [DOI: 10.1002/chem.201901701] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Indexed: 01/31/2023]
Affiliation(s)
- Tomoaki Tanase
- Department of ChemistryFaculty of ScienceNara Women's University, Kitauoya-nishi-machi Nara 630-8506 Japan
| | - Miho Tanaka
- Department of ChemistryFaculty of ScienceNara Women's University, Kitauoya-nishi-machi Nara 630-8506 Japan
| | - Mami Hamada
- Department of ChemistryFaculty of ScienceNara Women's University, Kitauoya-nishi-machi Nara 630-8506 Japan
| | - Yuka Morita
- Department of ChemistryFaculty of ScienceNara Women's University, Kitauoya-nishi-machi Nara 630-8506 Japan
| | - Kanako Nakamae
- Department of ChemistryFaculty of ScienceNara Women's University, Kitauoya-nishi-machi Nara 630-8506 Japan
| | - Yasuyuki Ura
- Department of ChemistryFaculty of ScienceNara Women's University, Kitauoya-nishi-machi Nara 630-8506 Japan
| | - Takayuki Nakajima
- Department of ChemistryFaculty of ScienceNara Women's University, Kitauoya-nishi-machi Nara 630-8506 Japan
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21
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Kathewad N, M C A, Parvin N, Parambath S, Parameswaran P, Khan S. Facile Buchwald-Hartwig coupling of sterically encumbered substrates effected by PNP ligands. Dalton Trans 2019; 48:2730-2734. [PMID: 30720832 DOI: 10.1039/c9dt00159j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The diphosphinoamine ligands [(Ph2P)2N(Ar); 1 (Ar = C6H5), 2 (Ar = 2,6-iPr2C6H3)] were effectively utilized in Buchwald-Hartwig coupling of a range of sterically demanding substrates. The reaction was carried out using conventional and microwave routes and the latter reduces the reaction time from 3 d to 15-30 min. A broad substrate scope was achieved in this protocol and most of the coupling products are isolated on a mutligram scale. DFT calculations were carried out to elucidate the reaction mechanism.
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Affiliation(s)
- Neha Kathewad
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune-411008, India.
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22
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Dhara D, Vijayakanth T, Nayak MK, Kalita P, Boomishankar R, Yildiz CB, Chandrasekhar V, Jana A. Contrasting reactivity of (boryl)(aryl)lithium-amide with electrophiles: N- vs. p-aryl-C-nucleophilic substitution. Dalton Trans 2018; 47:14411-14415. [PMID: 30256354 DOI: 10.1039/c8dt03201g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we report two different reactivity modes of lithium(aryl)(boryl)amide, 4, when it is reacted with chlorosilanes such as SiCl4 and MeSiHCl2, and chlorophosphine, Ph2PCl. Thus, the reaction of lithium(aryl)(boryl)amide, 4, with MeSiHCl2 leads exclusively to an N-substitution product, 6. On the other hand, the reaction of 4 with SiCl4 and Ph2PCl proceeds completely differently affording exclusively p-aryl-C-substitution products, 5 and 7, respectively.
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Affiliation(s)
- Debabrata Dhara
- Tata Institute of Fundamental Research Centre for Interdisciplinary Sciences 21, Brundavan Colony, Narsingi, Hyderabad-500075, India.
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23
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Kathewad N, Pal S, Kumawat RL, Ehesan Ali M, Khan S. Synthetic Diversity and Luminescence Properties of ArN(PPh
2
)
2
‐Based Copper(I) Complexes. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800096] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Neha Kathewad
- Department of Chemistry Indian Institute of Science Education and Research Dr. Homi Bhabha Road 411008 Pashan, Pune India
| | - Shiv Pal
- Department of Chemistry Indian Institute of Science Education and Research Dr. Homi Bhabha Road 411008 Pashan, Pune India
| | - Rameshwar L. Kumawat
- Phase‐10 Sector‐64 Institute of Nano Science and Technology 160062 Mohali Punjab India
| | - Md. Ehesan Ali
- Phase‐10 Sector‐64 Institute of Nano Science and Technology 160062 Mohali Punjab India
| | - Shabana Khan
- Department of Chemistry Indian Institute of Science Education and Research Dr. Homi Bhabha Road 411008 Pashan, Pune India
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24
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Głodek M, Makal A, Paluch P, Kadziołka-Gaweł M, Kobayashi Y, Zakrzewski J, Plażuk D. (Ar-CO-C[triple bond, length as m-dash]C)(PEt 3)Au and (Ar-C[triple bond, length as m-dash]C)(PEt 3)Au complexes bearing pyrenyl and ferrocenyl groups: synthesis, structure, and luminescence properties. Dalton Trans 2018; 47:6702-6712. [PMID: 29701735 DOI: 10.1039/c8dt01061g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Two types of (acetylide)(triethylphosphine)gold(i) complexes ArCOC[triple bond, length as m-dash]CAuPEt3 (1a and 1b) and ArC[triple bond, length as m-dash]CAuPEt3 (2a and 2b) bearing Ar = pyren-1-yl or ferrocenyl group were synthesized and the effect of a carbonyl moiety on the structure, propensity to ligand scrambling in solution and luminescence properties were investigated. We found that the complexes bearing acetylenic ketone-derived ligands underwent ligand scrambling in solution to afford mixtures of ArCOC[triple bond, length as m-dash]CAuPEt3 and [(ArCOC[triple bond, length as m-dash]C)2Au]-[Au(PEt3)2]+. The latter complexes were isolated and their structures were confirmed by single crystal X-ray diffraction studies. The aurophilic interaction of AuAu in these complexes resulted in the formation of wire-like structures.
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Affiliation(s)
- Marta Głodek
- Department of Organic Chemistry, Faculty of Chemistry, University of Łódź, ul. Tamka 12, 91-403 Łódź, Poland.
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25
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Dasgupta R, Panda A, Pal S, Veetil Muhasina P, De S, Parameswaran P, Khan S. Catalyst free boron carbon bond cleavage and facile formation of five-membered PNBCC heterocycles. Dalton Trans 2017; 46:15190-15194. [PMID: 29068030 DOI: 10.1039/c7dt03565a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The [3 + 2] cycloaddition reaction of phosphanyl aminoborane [N(2,6-iPr2C6H3)(PPh2)(BCy2)] (1) with activated alkynes led to boron and phosphorus containing five-membered heterocycles [(2,6-iPr2C6H3)NPPh2(CO2R)C-C(Cy)(CO2R)(BCy)] [R = Me (2), Et (3) and H (4)] with facile cleavage of the B-C bond and concomitant formation of a P-C bond with an ylidic character. DFT calculations indicate that 1 can be considered as a non-conjugated 1,3-dipole having two reaction centers viz., a nucleophilic P-center and an electrophilic B-center. The reaction of 1 with the alkynes proceeds through a stepwise dipolar addition mechanism, followed by the migration of the cyclohexyl group from the B-atom to the adjacent C-atom.
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Affiliation(s)
- Rajarshi Dasgupta
- Indian Institute of Science Education and Research Pune, Dr. Homi Bhaba Road, Pashan, Pune - 411008, India.
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26
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Ding S, Li J, Liu R, Fu G, Zhu H, Liu W, Ye Q. N-Geminal P/Al Lewis Pair-Alkyne Dipolar Cycloaddition to the Zwitterionic C 2PNAl-Heterocyclopentene. ACS OMEGA 2017; 2:2405-2414. [PMID: 31457589 PMCID: PMC6682165 DOI: 10.1021/acsomega.7b00236] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/03/2017] [Indexed: 06/10/2023]
Abstract
The N-geminal P/Al Lewis pair [Ph2PN(2,6-iPr2C6H3)AlEt2]2 (1) has been prepared and studied for reaction with a series of alkynes. The reaction of 1 with RC≡CR yielded zwitterionic C2PNAl-heterocyclopentene [Ph2 ⌜PN(2,6-iPr2C6H3)AlEt2](CR=⌝CR) (R = Me (2), Ph (3)); with PhC≡CEt produced two isomers, [Ph2 ⌜PN(2,6-iPr2C6H3)AlEt2](CPh=⌝CEt) (4a) and [Ph2 ⌜PN(2,6-iPr2C6H3)AlEt2](CEt=⌝CPh) (4b); and with other alkynes generated [Ph2 ⌜PN(2,6-iPr2C6H3)AlEt2](CR1=⌝CR2) (R1, R2 = CO2Et, Ph (5); SiMe3, Ph (6); PPh2, Ph (7); SiMe3,H (8); H, EtO (9)). Natural bond orbital analysis of the charge separation of the C≡C bond of alkynes was carried out, and then, the electronic matching interaction mode between the combined Lewis acid (AlEt2) and base (PPh2) groups of 1 and the C≡C bond of such alkynes was discussed. Reactions of 1 with alkene, nitrile, and carbodiimide molecules were also carried out, and cycloaddition compounds 10-12 were produced.
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Affiliation(s)
- Shuang Ding
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering
Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jiancheng Li
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering
Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Rui Liu
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering
Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Gang Fu
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering
Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Hongping Zhu
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering
Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Weiping Liu
- State
Key Laboratory for Platinum Group Metals, Kunming Institute of Precious Metals, Kunming, Yunnan 650106, China
| | - Qingsong Ye
- State
Key Laboratory for Platinum Group Metals, Kunming Institute of Precious Metals, Kunming, Yunnan 650106, China
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27
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Cyue JY, Kishore PV, Liao JH, Lin YR, Liu C. Synthesis and characterization of CuI/AuI complexes derived from monothiocarbonate and tertiary phosphine ligands. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.03.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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28
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Majhi PK, Franco JMV, Schnakenburg G, Sasamori T, Streubel R. Synthesis, Structure, and First Reactivity Studies of Functional (Phosphinoamino)boranes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601366] [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)
- Paresh Kumar Majhi
- Institut für Anorganische Chemie der Rheinischen Friedrich‐Wilhelms‐Universität Bonn Gerhard‐Domagk‐Straße 1 53121 Bonn Germany
| | - José Manuel Villalba Franco
- Institut für Anorganische Chemie der Rheinischen Friedrich‐Wilhelms‐Universität Bonn Gerhard‐Domagk‐Straße 1 53121 Bonn Germany
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie der Rheinischen Friedrich‐Wilhelms‐Universität Bonn Gerhard‐Domagk‐Straße 1 53121 Bonn Germany
| | - Takahiro Sasamori
- Institute for Chemical Research Kyoto University Gokasho Uji 611‐0011 Kyoto Japan
| | - Rainer Streubel
- Institut für Anorganische Chemie der Rheinischen Friedrich‐Wilhelms‐Universität Bonn Gerhard‐Domagk‐Straße 1 53121 Bonn Germany
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29
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Ghisolfi A, Fliedel C, de Frémont P, Braunstein P. Mono- and polynuclear Ag(i) complexes of N-functionalized bis(diphenylphosphino)amine DPPA-type ligands: synthesis, solid-state structures and reactivity. Dalton Trans 2017; 46:5571-5586. [DOI: 10.1039/c6dt04755f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
DPPA-type ligands (Ph2P)2N(p-Z)C6H4 (Z = H, SMe, OMe) led to Ag(i) complexes of various nuclearities and an unexpected influence of the para-substituent Z is observed, including for CH2Cl2 activation.
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Affiliation(s)
- Alessio Ghisolfi
- Université de Strasbourg
- CNRS
- CHIMIE UMR 7177
- Laboratoire de Chimie de Coordination
- 67081 Strasbourg
| | - Christophe Fliedel
- Laboratoire de Chimie de Coordination (LCC)
- CNRS – UPR 8241
- F-31077 Toulouse Cedex 4
- France
| | - Pierre de Frémont
- Université de Strasbourg
- CNRS
- CHIMIE UMR 7177
- Equipe de Synthèse
- Réactivité et Catalyse Organométallique
| | - Pierre Braunstein
- Université de Strasbourg
- CNRS
- CHIMIE UMR 7177
- Laboratoire de Chimie de Coordination
- 67081 Strasbourg
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30
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Comparing Nucleophilicity of Heavier Heteroleptic Amidinato-Amido Tetrelylenes: An Experimental and Theoretical Study. ChemistrySelect 2016. [DOI: 10.1002/slct.201600656] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Ai P, Mauro M, De Cola L, Danopoulos AA, Braunstein P. A Bis(Diphosphanyl N-Heterocyclic Carbene) Gold Complex: A Synthon for Luminescent Rigid AuAg2 Arrays and Au5 and Cu6 Double Arrays. Angew Chem Int Ed Engl 2016; 55:3338-41. [PMID: 26823329 DOI: 10.1002/anie.201510150] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Indexed: 12/18/2022]
Abstract
A mononuclear bis(NHC)/Au(I) (NHC=N-heterocyclic carbene) cationic complex with a rigid bis(phosphane)-functionalized NHC ligand (PC(NHC)P) was used to construct linear Au3 and Ag2 Au arrays, a Au5 cluster with two intersecting crosslike Au3 arrays, and an unprecedented Cu6 complex with two parallel Cu3 arrays. The impact of metallophilic interactions on photoluminescence was studied experimentally.
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Affiliation(s)
- Pengfei Ai
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, 67081, Strasbourg Cedex, France
| | - Matteo Mauro
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires, Institut de Science et d'Ingénierie Supramoléculaires (I.S.I.S.), Université de Strasbourg, 8 allée Gaspard Monge, 67000, Strasbourg, France
| | - Luisa De Cola
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires, Institut de Science et d'Ingénierie Supramoléculaires (I.S.I.S.), Université de Strasbourg, 8 allée Gaspard Monge, 67000, Strasbourg, France
| | - Andreas A Danopoulos
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, 67081, Strasbourg Cedex, France. .,Institute for Advanced Study (USIAS), Université de Strasbourg, 4 rue Blaise Pascal, 67081, Strasbourg Cedex, France.
| | - Pierre Braunstein
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, 67081, Strasbourg Cedex, France.
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Ai P, Mauro M, De Cola L, Danopoulos AA, Braunstein P. A Bis(Diphosphanyl N-Heterocyclic Carbene) Gold Complex: A Synthon for Luminescent Rigid AuAg2
Arrays and Au5
and Cu6
Double Arrays. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510150] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Pengfei Ai
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS); Université de Strasbourg; 4 rue Blaise Pascal 67081 Strasbourg Cedex France
| | - Matteo Mauro
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires; Institut de Science et d'Ingénierie Supramoléculaires (I.S.I.S.); Université de Strasbourg; 8 allée Gaspard Monge 67000 Strasbourg France
| | - Luisa De Cola
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires; Institut de Science et d'Ingénierie Supramoléculaires (I.S.I.S.); Université de Strasbourg; 8 allée Gaspard Monge 67000 Strasbourg France
| | - Andreas A. Danopoulos
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS); Université de Strasbourg; 4 rue Blaise Pascal 67081 Strasbourg Cedex France
- Institute for Advanced Study (USIAS); Université de Strasbourg; 4 rue Blaise Pascal 67081 Strasbourg Cedex France
| | - Pierre Braunstein
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS); Université de Strasbourg; 4 rue Blaise Pascal 67081 Strasbourg Cedex France
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Khan S, Pal S, Kathewad N, Purushothaman I, De S, Parameswaran P. Stepwise isolation of an unprecedented silylene supported dinuclear gold(i) cation with aurophilic interaction. Chem Commun (Camb) 2016; 52:3880-2. [DOI: 10.1039/c6cc00597g] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Isolation of the first Si(ii) supported dinuclear Au(i) cation with an intramolecular Au⋯Au interaction of 2.875(1) Å has been realized.
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Affiliation(s)
- Shabana Khan
- Department of Chemistry
- Indian Institute of Science Education and Research Pune
- Pashan
- India
| | - Shiv Pal
- Department of Chemistry
- Indian Institute of Science Education and Research Pune
- Pashan
- India
| | - Neha Kathewad
- Department of Chemistry
- Indian Institute of Science Education and Research Pune
- Pashan
- India
| | - Indu Purushothaman
- Department of Chemistry
- National Institute of Technology Calicut
- Calicut - 673 601
- India
| | - Susmita De
- Department of Chemistry
- National Institute of Technology Calicut
- Calicut - 673 601
- India
| | - Pattiyil Parameswaran
- Department of Chemistry
- National Institute of Technology Calicut
- Calicut - 673 601
- India
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