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Vittardi SB, Thapa Magar R, Breen DJ, Rack JJ. A Future Perspective on Phototriggered Isomerizations of Transition Metal Sulfoxides and Related Complexes. J Am Chem Soc 2021; 143:526-537. [PMID: 33400512 DOI: 10.1021/jacs.0c08820] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Photochromic molecules are examples of light-activated bistable molecules. We highlight the design criteria for a class of ruthenium and osmium sulfoxide complexes that undergo phototriggered isomerization of the bound sulfoxide. The mode of action in these complexes is an excited-state isomerization of the sulfoxide from S-bonded to O-bonded. We discuss the basic mechanism for this transformation and highlight specific examples that demonstrate the effectiveness and efficiency of the isomerization. We subsequently discuss future research directions within the field of phototriggered sulfoxide isomerizations on transition metal polypyridine complexes. These efforts involve new synthetic directions, including the choice of metal as well as new ambidentate ligands for isomerization.
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Affiliation(s)
- Sebastian B Vittardi
- Department of Chemistry and Chemical Biology, 300 Terrace Street NE, University of New Mexico, Albuquerque, New Mexico 87131-001 United States
| | - Rajani Thapa Magar
- Department of Chemistry and Chemical Biology, 300 Terrace Street NE, University of New Mexico, Albuquerque, New Mexico 87131-001 United States
| | - Douglas J Breen
- Department of Chemistry and Chemical Biology, 300 Terrace Street NE, University of New Mexico, Albuquerque, New Mexico 87131-001 United States
| | - Jeffrey J Rack
- Department of Chemistry and Chemical Biology, 300 Terrace Street NE, University of New Mexico, Albuquerque, New Mexico 87131-001 United States
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2
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Ananyev IV, Bokach NA, Kukushkin VY. Structure-directing sulfur...metal noncovalent semicoordination bonding. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2020; 76:436-449. [PMID: 32831262 DOI: 10.1107/s2052520620005685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 04/22/2020] [Indexed: 06/11/2023]
Abstract
The abundance and geometric features of nonbonding contacts between metal centers and `soft' sulfur atoms bound to a non-metal substituent R were analyzed by processing data from the Cambridge Structural Database. The angular arrangement of M, S and R atoms with ∠(R-S...M) down to 150° was a common feature of the late transition metal complexes exhibiting shortened R-S...M contacts. Several model nickel(II), palladium(II), platinum(II) and gold(I) complexes were chosen for a theoretical analysis of R-S...M interactions using the DFT method applied to (equilibrium) isolated systems. A combination of the real-space approaches, such as Quantum Theory of Atoms in Molecules (QTAIM), noncovalent interaction index (NCI), electron localization function (ELF) and Interacting Quantum Atoms (IQA), and orbital (Natural Bond Orbitals, NBO) methods was used to provide insights into the nature and energetics of R-S...M interactions with respect to the metal atom identity and its coordination environment. The explored features of the R-S...M interactions support the trends observed by inspecting the CSD statistics, and indicate a predominant contribution of semicoordination bonds between nucleophilic sites of the sulfur atom and electrophilic sites of the metal. A contribution of chalcogen bonding (that is formally opposite to semicoordination) was also recognized, although it was significantly smaller in magnitude. The analysis of R-S...M interaction strengths was performed and the structure-directing role of the intramolecular R-S...M interactions in stabilizing certain conformations of metal complexes was revealed.
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Affiliation(s)
- Ivan V Ananyev
- Laboratory of X-ray Structural Studies, Institute of Organoelement Compounds (INEOS) of RAS, Vavilova Str., 28, Moscow, 119991, Russian Federation
| | - Nadezhda A Bokach
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab., 7/9, Saint Petersburg, Russian Federation
| | - Vadim Yu Kukushkin
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab., 7/9, Saint Petersburg, Russian Federation
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Rahman MM, Smith MD, Peryshkov DV. Formation of a Cationic Vinylimido Group upon C-H Activation of Nitriles by Trialkylamines in the Presence of TaCl5. Inorg Chem 2016; 55:5101-3. [PMID: 27172115 DOI: 10.1021/acs.inorgchem.6b00677] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a new CH3CN activation mode where an imido group is directly formed by deprotonation of the nitrile coordinated to the highly Lewis acidic Ta(V) center. The unexpected deprotonation of TaCl5(CH3CN) by NEt3 resulted in isolation of the triethylammonium vinylimido complex [HNEt3][Ta(NC(CH2)NEt3)Cl5]. The reaction is proposed to proceed through rearrangement of the initial nucleophilic carbanion to the electrophilic azaallene/carbocation intermediate. The use of more sterically hindered (i-Pr)CN and weakly nucleophilic N(i-Pr)2Et resulted in the isolation of a vinylimido group formed upon dimerization of deprotonated nitriles, suggesting deprotonation as the first step of the transformation.
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Affiliation(s)
- Md Mamdudur Rahman
- Department of Chemistry and Biochemistry, University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Mark D Smith
- Department of Chemistry and Biochemistry, University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Dmitry V Peryshkov
- Department of Chemistry and Biochemistry, University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
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Ivanov DM, Gushchin PV, Novikov AS, Avdontceva MS, Zolotarev AA, Starova GL, Chen Y, Liu S, Chou P, Kukushkin VY. Platinum(II)‐Mediated Double Coupling of 2,3‐Diphenylmaleimidine with Nitrile Functionalities To Give Annulated Pentaazanonatetraenate (PANT) Systems. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Daniil M. Ivanov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation, http://ptchemin.chem.spbu.ru/
| | - Pavel V. Gushchin
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation, http://ptchemin.chem.spbu.ru/
| | - Alexander S. Novikov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation, http://ptchemin.chem.spbu.ru/
| | - Margarita S. Avdontceva
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation, http://ptchemin.chem.spbu.ru/
| | - Andrey A. Zolotarev
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation, http://ptchemin.chem.spbu.ru/
| | - Galina L. Starova
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation, http://ptchemin.chem.spbu.ru/
| | - Yi‐Ting Chen
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan, http://www.ch.ntu.edu.tw/~ptchou/
| | - Shih‐Hung Liu
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan, http://www.ch.ntu.edu.tw/~ptchou/
| | - Pi‐Tai Chou
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan, http://www.ch.ntu.edu.tw/~ptchou/
| | - Vadim Yu. Kukushkin
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation, http://ptchemin.chem.spbu.ru/
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, V. O. Bolshoi Pr. 31, 199004 Saint Petersburg, Russian Federation
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Serebryanskaya TV, Novikov AS, Gushchin PV, Zolotarev AA, Gurzhiy VV, Kukushkin VY. Coupling of platinated triguanides with platinum-activated nitriles as a novel strategy for generation of dimetallic systems. Dalton Trans 2015; 44:6003-11. [PMID: 25720690 DOI: 10.1039/c4dt03870c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
One of two Pt(IV)-activated propanenitriles in trans-[PtCl4(EtCN)2] is involved in platinum(IV)-mediated nitrile-imine coupling with the platinum(II)-based metallacycles [PtCl2{NH=C(NR2)N(Ph)C(=NH)N(Ph)C(NR2)=NH}] [R2 = Me2 (1a), C5H10 (1b)] yielding diplatinum products, whose structures depend on molar ratios between the reactants. At a 1 : 1 ratio, the mixed-valence platinum(II)/platinum(IV) species [PtCl4{NH=C(NR2)N(Ph)C{=[(N(Et)C=NH)PtCl2(EtCN)]}N(Ph)C(NR2)=NH}] [R2 = Me2 (2a), (CH2)5 (2b)] were generated, whereas at a 1 : 2 ratio the dinuclear platinum(II)/platinum(II) complexes [PtCl2{NH=C(NR2)N(Ph)C{=[(N(Et)C=NH)PtCl2(EtCN)]}N(Ph)C(NR2)=NH}] [R2 = Me2 (3a), (CH2)5 (3b)] were obtained. In contrast to the nitrile-imine coupling observed for the platinum(IV) dinitrile complex, the reaction between the platinum(II) congener trans-[PtCl2(EtCN)2] and any one of 1a,b gives exclusively the substituted dimetallic platinum(II)/platinum(II) products [PtCl2{NH=C(NR2)N(Ph)C{=[(NH)PtCl2(EtCN)]}N(Ph)C(NR2)=NH}] [R2 = Me2 (6a), (CH2)5 (6b)] featuring platinum-containing guanidine 1 as one of the ligands. Complexes 2a,b, 3a,b, and 6a,b were characterized by elemental analyses (C, H, N), HRESI-MS, IR, (1)H NMR spectroscopy, and DTA/TG. The molecular and crystal structure of 2a·2CDCl3 was additionally studied by single-crystal X-ray diffraction. Complexes 2a,b undergo further redox transformation in solutions, and single crystals of [PtCl2{NH=C(NMe2)N(Ph)C{=[(N(Et)C=NH)PtCl2(MeCN)]}N(Ph)C(NMe2)=NH}]·2CH2Cl2 (3'a·2CH2Cl2) were obtained from 2a in a CH2Cl2-MeCN-C2H4Cl2 mixture and studied by X-ray crystallography. The driving forces for the generation of diplatinum products 2 and 3 were elucidated based on a quantum-chemical study.
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Affiliation(s)
- Tatiyana V Serebryanskaya
- Institute of Chemistry, Saint Petersburg State University, Universitetsky Pr. 26, 198504 Stary Petergof, Russian Federation.
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Synthesis and solvent induced halide exchange of the electron rich, half sandwich complexes [FeI(dppe)Cp] and [MoX(dppe)(η7-C7H7)] (X = Br, Cl; dppe = Ph2PCH2CH2PPh2). J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.11.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Lasri J. Palladium(II)-assisted [2+3] cycloaddition of nitrones to organonitriles: Synthesis of 2,3-dihydropyrrolo[1,2-a]quinazolin-5-one and Δ4-1,2,4-oxadiazoline derivatives. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Gushchin PV, Kuznetsov ML, Haukka M, Kukushkin VY. Recognition of a Novel Type X═N–Hal···Hal (X = C, S, P; Hal = F, Cl, Br, I) Halogen Bonding. J Phys Chem A 2013; 117:2827-34. [DOI: 10.1021/jp3112149] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Pavel V. Gushchin
- Department of Chemistry, Saint Petersburg State University, 198504 Stary Petergof,
Russian Federation
| | - Maxim L. Kuznetsov
- Centro
de Química Estrutural,
Complexo I, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais, 1049-001
Lisbon, Portugal
| | - Matti Haukka
- Department
of Chemistry, University of Jyväskylä, P.O. Box 35,
FI-40014, Jyväskylä, Finland
| | - Vadim Yu. Kukushkin
- Department of Chemistry, Saint Petersburg State University, 198504 Stary Petergof,
Russian Federation
- Institute of Macromolecular Compounds of Russian Academy of Sciences, V. O. Bolshoii
Pr. 31, 199004, Saint Petersburg, Russian Federation
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9
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Eliseev II, Bokach NA, Haukka M, Golenya IA. cis-Dichlorido(dimethyl sulfoxide-κS)(N,N,N',N'-tetra-methyl-guanidine-κN'')platinum(II). Acta Crystallogr Sect E Struct Rep Online 2013; 69:m117-8. [PMID: 23424410 PMCID: PMC3569208 DOI: 10.1107/s160053681300130x] [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: 12/17/2012] [Accepted: 01/13/2013] [Indexed: 11/25/2022]
Abstract
In the title compound, cis-[PtCl2(C5H13N3)(C2H6OS)], the four-coordinate PtII atom is bonded to one N atom of the N,N,N′,N′-tetramethylguanidine ligand, one dimethyl sulfoxide S atom and two chloride ligands, forming a cis-square-planar geometry. The bond lengths and angles of the N—Pt—Cl functionality are typical for imine dichloridoplatinum(II) complexes. The H atom of the imino group is oriented towards the O atom of the sulfoxide group of a neighboring molecule and forms an N—H⋯O hydrogen bond.
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Affiliation(s)
- Ivan I Eliseev
- Department of Chemistry, St Petersburg State University, 198504 Petrodvorets, Russian Federation
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10
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Lasri J, Kuznetsov ML, Guedes da Silva MFC, Pombeiro AJL. PtII-Mediated Imine–Nitrile Coupling Leading to Symmetrical (1,3,5,7,9-Pentaazanona-1,3,6,8-tetraenato)Pt(II) Complexes Containing the Incorporated 1,3-Diiminoisoindoline Moiety. Inorg Chem 2012; 51:10774-86. [DOI: 10.1021/ic301176b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jamal Lasri
- Centro de Química Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon,
Portugal
| | - Maxim L. Kuznetsov
- Centro de Química Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon,
Portugal
| | - M. Fátima C. Guedes da Silva
- Centro de Química Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon,
Portugal
- Universidade Lusófona de Humanidades e Tecnologias, Av. Campo Grande 376,
ULHT Lisbon, 1749-024, Lisbon, Portugal
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon,
Portugal
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11
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Rocha BG, Wanke R, Guedes da Silva MFC, Luzyanin KV, Martins LM, Smolénski P, Pombeiro AJ. Reactivity of bulky tris(phenylpyrazolyl)methanesulfonate copper(I) complexes towards small unsaturated molecules. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.03.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Copper(II)-mediated in-situ hydrolyses of pyrroline N-oxide and benzonitrile leading to a mixed ligand complex. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.01.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Bolotin DS, Bokach NA, Haukka M, Kukushkin VY. Platinum(IV)-Mediated Nitrile-Amidoxime Coupling Reactions: Insights into the Mechanism for the Generation of 1,2,4-Oxadiazoles. Chempluschem 2012. [DOI: 10.1002/cplu.201100047] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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14
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Liu X, Chen W. Synthesis of ruthenium(ii) complexes of tetradentate bis(N-pyridylimidazolylidenyl)methane and their reactivities towards N- donors. Dalton Trans 2012; 41:599-608. [DOI: 10.1039/c1dt11356a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Kopylovich MN, Karabach YY, Guedes da Silva MFC, Figiel PJ, Lasri J, Pombeiro AJL. Alkoxy-1,3,5-triazapentadien(e/ato) Copper(II) Complexes: Template Formation and Applications for the Preparation of Pyrimidines and as Catalysts for Oxidation of Alcohols to Carbonyl Products. Chemistry 2011; 18:899-914. [DOI: 10.1002/chem.201101688] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Revised: 09/08/2011] [Indexed: 01/13/2023]
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16
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Popova EA, Bokach NA, Haukka M, Trifonov RE, Ostrovskii VA. A new route to N(1)-5R-tetrazole complexes via azidation to nitriles coordinated to Pt(II) and Pt(IV). Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.05.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Michelin RA, Sgarbossa P, Sbovata SM, Gandin V, Marzano C, Bertani R. Chemistry and biological activity of platinum amidine complexes. ChemMedChem 2011; 6:1172-83. [PMID: 21630470 DOI: 10.1002/cmdc.201100150] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Revised: 04/26/2011] [Indexed: 01/06/2023]
Abstract
Platinum amidine complexes represent a new class of potential antitumor drugs that contain the imino moiety HN=C(sp(2)) bonded to the platinum center. They can be related to the iminoether derivatives, which were recently shown to be the first Pt(II) compounds with a trans configuration endowed with anticancer activity. The chemical and biological properties of platinum amidine complexes, and more generally of platinum imino derivatives, can be rationally modified through suitable synthetic procedures with the aim of improving their cytotoxicity and antitumor activity. The addition of protic nucleophiles to nitriles coordinated to platinum in various oxidation states can offer a wide variety of complexes with chemical, structural, and physical properties specifically tuned for a more efficacious biological response.
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Affiliation(s)
- Rino A Michelin
- Department of Chemical Processes of Engineering, Padova University, Via F. Marzolo 9, 35131 Padova, Italy
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Bokach NA, Balova IA, Haukka M, Kukushkin VY. Highly Stereoselective 1,3-Dipolar Cycloaddition of Nitrones to (Nitrile)2PtII Species Furnishing Diastereomerically Pure 2,3-Dihydro-1,2,4-oxadiazole Ligands. Organometallics 2011. [DOI: 10.1021/om100957b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Nadezhda A. Bokach
- Department of Chemistry, St. Petersburg State University, Universitetsky Pr. 26, 198504 Stary Petergof, Russian Federation
| | - Irina A. Balova
- Department of Chemistry, St. Petersburg State University, Universitetsky Pr. 26, 198504 Stary Petergof, Russian Federation
| | - Matti Haukka
- Department of Chemistry, University of Eastern Finland, P.O. Box 111, FI-80101, Joensuu, Finland
| | - Vadim Yu. Kukushkin
- Department of Chemistry, St. Petersburg State University, Universitetsky Pr. 26, 198504 Stary Petergof, Russian Federation
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, V.O. Bolshoi Pr. 31, 199004 St. Petersburg, Russian Federation
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Marzano C, Mazzega Sbovata S, Gandin V, Colavito D, Del Giudice E, Michelin RA, Venzo A, Seraglia R, Benetollo F, Schiavon M, Bertani R. A new class of antitumor trans-amine-amidine-Pt(II) cationic complexes: influence of chemical structure and solvent on in vitro and in vivo tumor cell proliferation. J Med Chem 2010; 53:6210-27. [PMID: 20681543 DOI: 10.1021/jm1006534] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reactions of cyclopropylamine, cyclopentylamine, and cyclohexylamine with trans-[PtCl2(NCMe)2] afforded the bis-cationic complexes trans-[Pt(amine)2(Z-amidine)2]2+[Cl-]2, 1-3. The solution behavior and biological activity have been studied in different solvents (DMSO, water, polyethylene glycol (PEG 400), and polyethylene glycol dimethyl ether (PEG-DME 500)). The biological activity was strongly influenced by the cycloaliphatic amine ring size, with trans-[Pt(NH2CH(CH2)4CH2)2{N(H) horizontal lineC(CH3)N(H)CH(CH2)4CH2}2]2+[Cl-]2 (3) being the most active compound. Complex 3 overcame both cisplatin and MDR resistance, inducing cancer cell death through p53-mediated apoptosis. Alkaline single-cell gel electrophoresis experiments indicated direct DNA damage, reasonably attributable to DNA adducts of trans-[PtCl(amine)(Z-amidine)2][Cl] species, which can evolve to produce disruptive and nonrepairable lesions on DNA, thus leading to the drug-induced programmed cancer cell death. Preliminary in vivo antitumor studies on C57BL mice bearing Lewis lung carcinoma highlighted that complex 3 promoted a significant and dose-dependent tumor growth inhibition without adverse side effects.
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Affiliation(s)
- Cristina Marzano
- Department of Pharmaceutical Sciences, Universy of Padova, Via F. Marzolo 5, I-35131 Padova, Italy
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20
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Bokach NA, Elsegood MRJ, Holmes KE, Kelly PF, Kukushkin VY, Makarycheva-Mikhailova AV, Parr J, Pombeiro AJL, Stonehouse JM. FORMATION OF RING SYSTEMS WITHIN SULFIMIDES AND THEIR METAL COMPLEXES. PHOSPHORUS SULFUR 2010. [DOI: 10.1080/10426500490429789] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- N. A. Bokach
- a Loughborough University , Loughborough, United Kingdom
| | | | - K. E. Holmes
- a Loughborough University , Loughborough, United Kingdom
| | - Paul F. Kelly
- a Loughborough University , Loughborough, United Kingdom
| | | | | | - J. Parr
- a Loughborough University , Loughborough, United Kingdom
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21
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Kuznetsov ML, Bokach NA, Kharlampidi DD, Medvedev YN, Kukushkin VY, Dementiev AI. Theoretical study of nucleophilic addition of amines to organic nitriles. RUSS J GEN CHEM+ 2010. [DOI: 10.1134/s1070363210030151] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Bokach NA, Konovalova NP, Wang Y, Moskalenko YE, Gribanov AV, Kukushkin VY. One-end nucleophilic addition of di- and triamines to PtIV-coordinated nitriles as an entry to (amidine)PtIV complexes bearing pendant NH2-groups. Dalton Trans 2010; 39:4619-23. [DOI: 10.1039/c001103g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Tskhovrebov AG, Bokach NA, Haukka M, Kukushkin VY. Different Routes for Amination of Platinum(II)-Bound Cyanoguanidine. Inorg Chem 2009; 48:8678-88. [DOI: 10.1021/ic900263e] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander G. Tskhovrebov
- Department of Chemistry, St. Petersburg State University, Univeritetsky Pr. 26, 198504 Stary Petergof, Russian Federation
| | - Nadezhda A. Bokach
- Department of Chemistry, St. Petersburg State University, Univeritetsky Pr. 26, 198504 Stary Petergof, Russian Federation
| | - Matti Haukka
- Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101, Joensuu, Finland
| | - Vadim Yu. Kukushkin
- Department of Chemistry, St. Petersburg State University, Univeritetsky Pr. 26, 198504 Stary Petergof, Russian Federation
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, V. O. Bolshoi Pr. 31, 199004 St. Petersburg, Russian Federation
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Kuznetsov ML, Bokach NA, Kukushkin VY, Dement’ev AI. Theoretical study of ammonia nucleophilic addition to nitriles in platinum complexes. RUSS J GEN CHEM+ 2009. [DOI: 10.1134/s107036320902011x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Luzyanin KV, Guedes da Silva MFC, Kukushkin VY, Pombeiro AJ. First example of an imine addition to coordinated isonitrile. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.02.026] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bokach NA, Kuznetsov ML, Haukka M, Ovcharenko VI, Tretyakov EV, Kukushkin VY. Platinum(II)-Complexed Tetrahydroimidazo[1,2-b][1,2,4]oxadiazoles Derived from Metal-Mediated 1,3-Dipolar Cycloaddition. Novel Type of Heterocycles, Which Do Not Exist without the Metal Center. Organometallics 2009. [DOI: 10.1021/om800963d] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Nadezhda A. Bokach
- Department of Chemistry, St.Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, Moscow Pedagogical State University, 3, Nesvigskiy per., 119021 Moscow, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101, Joensuu, Finland, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia, and Institute of Macromolecular Compounds of the Russian Academy of Sciences, V. O. Bolshoi Pr
| | - Maxim L. Kuznetsov
- Department of Chemistry, St.Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, Moscow Pedagogical State University, 3, Nesvigskiy per., 119021 Moscow, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101, Joensuu, Finland, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia, and Institute of Macromolecular Compounds of the Russian Academy of Sciences, V. O. Bolshoi Pr
| | - Matti Haukka
- Department of Chemistry, St.Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, Moscow Pedagogical State University, 3, Nesvigskiy per., 119021 Moscow, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101, Joensuu, Finland, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia, and Institute of Macromolecular Compounds of the Russian Academy of Sciences, V. O. Bolshoi Pr
| | - Victor I. Ovcharenko
- Department of Chemistry, St.Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, Moscow Pedagogical State University, 3, Nesvigskiy per., 119021 Moscow, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101, Joensuu, Finland, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia, and Institute of Macromolecular Compounds of the Russian Academy of Sciences, V. O. Bolshoi Pr
| | - Eugeny V. Tretyakov
- Department of Chemistry, St.Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, Moscow Pedagogical State University, 3, Nesvigskiy per., 119021 Moscow, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101, Joensuu, Finland, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia, and Institute of Macromolecular Compounds of the Russian Academy of Sciences, V. O. Bolshoi Pr
| | - Vadim Yu. Kukushkin
- Department of Chemistry, St.Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, Moscow Pedagogical State University, 3, Nesvigskiy per., 119021 Moscow, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101, Joensuu, Finland, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia, and Institute of Macromolecular Compounds of the Russian Academy of Sciences, V. O. Bolshoi Pr
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Lasri J, da Silva MFCG, Kopylovich MN, Mukhopadhyay S, Charmier MAJ, Pombeiro AJL. PdII-promoted [2 + 3] cycloaddition of pyrroline N-oxide to organonitriles. Application of (Δ4-1,2,4-oxadiazoline)-PdII complexes in the Suzuki–Miyaura reaction. Dalton Trans 2009:2210-6. [DOI: 10.1039/b813996b] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Kopylovich MN, Lasri J, Guedes da Silva MFC, Pombeiro AJL. Single-pot template transformations of cyanopyridines on a PdII centre: syntheses of ketoimine and 2,4-dipyridyl-1,3,5-triazapentadiene palladium(II) complexes and their catalytic activity for microwave-assisted Suzuki–Miyaura and Heck reactions. Dalton Trans 2009:3074-84. [DOI: 10.1039/b820680e] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Tyan MR, Bokach NA, Wang MJ, Haukka M, Kuznetsov ML, Kukushkin VY. Facile cyanamide-ammonia coupling mediated by cis- and trans-[PtIIL2] centers and giving metal-bound guanidines. Dalton Trans 2008:5178-88. [PMID: 18813372 DOI: 10.1039/b806862c] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Diffusion of ammonia into CH(2)Cl(2) solutions of the dialkylcyanamide complexes cis- or trans-[PtCl(2)(RCN)(2)] (R = NMe(2), NEt(2), NC(5)H(10)) at 20-25 degrees C leads to metal-mediated cyanamide-ammonia coupling to furnish, depending on reaction time, one or another type of novel bisguanidine compound, i.e. the molecular cis- or trans-[PtCl(2){NH=C(NH(2))R}(2)] (cis- and trans-) and the cationic cis- or trans-[Pt(NH(3))(2){NH=C(NH(2))R}(2)](Cl)(2) (cis- and trans-) complexes. Compounds cis- or trans- were converted to cis- or trans-, accordingly, upon prolonged treatment with NH(3) in CH(2)Cl(2). The ammination of the relevant nitrile complexes cis- or trans-[PtCl(2)(RCN)(2)] (R = Et, CH(2)Ph, Ph) in CH(2)Cl(2) solutions affords only the cationic compounds cis- or trans-[Pt(NH(3))(2){NH=C(NH(2))R}(2)](Cl)(2) (cis- and trans-). The formulation of was supported by satisfactory C, H and N elemental analyses, agreeable ESI(+)-MS (or FAB(+)-MS), IR, (1)H and (13)C NMR spectroscopies. The structures of trans-, trans-, cis-, trans-, cis-, and cis- were determined by single-crystal X-ray diffraction disclosing structural features and showing that the ammination gives ligated guanidines and amidines in the E- and Z-forms, respectively, where both correspond to the trans-addition of NH(3) to the nitrile species.
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Affiliation(s)
- Marina R Tyan
- Department of Chemistry, St. Petersburg State University, Stary Petergof, Russian Federation
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Lasri J, Guedes da Silva MFC, Charmier MAJ, Pombeiro AJL. Optically Active Mixed Unsymmetric Imine Platinum(II) Complexes - Utilization of the Liberated Imines for Further Syntheses of Mixed Imine-Diazadiene Complexes and of (E)-Cyanoalkenes. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800343] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Gushchin PV, Tyan MR, Bokach NA, Revenco MD, Haukka M, Wang MJ, Lai CH, Chou PT, Kukushkin VY. Novel Tailoring Reaction for Two Adjacent Coordinated Nitriles Giving Platinum 1,3,5-Triazapentadiene Complexes. Inorg Chem 2008; 47:11487-500. [PMID: 18376821 DOI: 10.1021/ic702483w] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pavel V. Gushchin
- St. Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, State University of Moldova, MD 2009 Chisinau, Republic of Moldova, Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoii Pr. 31, 199004 St. Petersburg, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland, Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Road, Section 4
| | - Marina R. Tyan
- St. Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, State University of Moldova, MD 2009 Chisinau, Republic of Moldova, Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoii Pr. 31, 199004 St. Petersburg, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland, Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Road, Section 4
| | - Nadezhda A. Bokach
- St. Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, State University of Moldova, MD 2009 Chisinau, Republic of Moldova, Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoii Pr. 31, 199004 St. Petersburg, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland, Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Road, Section 4
| | - Mikhail D. Revenco
- St. Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, State University of Moldova, MD 2009 Chisinau, Republic of Moldova, Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoii Pr. 31, 199004 St. Petersburg, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland, Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Road, Section 4
| | - Matti Haukka
- St. Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, State University of Moldova, MD 2009 Chisinau, Republic of Moldova, Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoii Pr. 31, 199004 St. Petersburg, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland, Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Road, Section 4
| | - Meng-Jiy Wang
- St. Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, State University of Moldova, MD 2009 Chisinau, Republic of Moldova, Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoii Pr. 31, 199004 St. Petersburg, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland, Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Road, Section 4
| | - Cheng-Hsuan Lai
- St. Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, State University of Moldova, MD 2009 Chisinau, Republic of Moldova, Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoii Pr. 31, 199004 St. Petersburg, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland, Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Road, Section 4
| | - Pi-Tai Chou
- St. Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, State University of Moldova, MD 2009 Chisinau, Republic of Moldova, Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoii Pr. 31, 199004 St. Petersburg, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland, Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Road, Section 4
| | - Vadim Yu. Kukushkin
- St. Petersburg State University, 198504 Stary Petergof, Russian Federation, Department of Chemistry, State University of Moldova, MD 2009 Chisinau, Republic of Moldova, Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoii Pr. 31, 199004 St. Petersburg, Russian Federation, Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland, Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Road, Section 4
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Kuznetsov ML, Kukushkin VY, Pombeiro AJL. Reactivity of Pt- and Pd-bound nitriles towards nitrile oxides and nitrones: substitution vs. cycloaddition. Dalton Trans 2008:1312-22. [PMID: 18305843 DOI: 10.1039/b713425h] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Reactions of the nitrone CH3CH=N(CH3)O and the nitrile oxide CH3C[triple bond]NO with the nitrile complexes trans-[MCl2(N[triple bond]CCH3)2] (M = Pt, 1; Pd, 2) were investigated by theoretical methods at B3LYP and, for some processes, CCSD(T) levels of theory. The mechanisms of substitutions and cycloadditions were studied in detail. The former occur via a concerted asynchronous mechanism of dissociative type. The calculations of the metal-ligand bond energies in the starting complexes and substitution products and the analysis of structural features of the transition states indicate that the M-N bond dissociation (rather than M-O bond formation) is the step, which controls the reactivity of and in substitutions. The different chemical behaviours of the Pt and Pd complexes towards the 1,3-dipoles were investigated. The exclusive isolation of cycloaddition rather than substitution products in any solvents in the case of is both kinetically and thermodynamically controlled. The switch of the reaction mode from cycloaddition to substitution for 2 in CH2Cl2 solution is caused by the significantly lower Pd-N bond energy in comparison with the Pt-N bond energy, consistent with the higher lability of the Pd complexes. The different chemical behaviour of 2 in CH3CN and CH2Cl2 solvents is accounted for by the great excess of acetonitrile in the CH3CN solution rather than a different solvation character. The relative variation of Wiberg bond indices along the reaction path is proposed as a quantitative criterion for the classification of the reaction mechanism.
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Affiliation(s)
- Maxim L Kuznetsov
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, TU Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal.
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Scaffidi-Domianello YY, Nazarov AA, Haukka M, Galanski MS, Keppler BK, Schneider J, Du P, Eisenberg R, Kukushkin VY. First Example of the Solid-State Thermal Cyclometalation of Ligated Benzophenone Imine Giving Novel Luminescent Platinum(II) Species. Inorg Chem 2007; 46:4469-82. [PMID: 17451237 DOI: 10.1021/ic062414k] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The (benzophenone imine)platinum(II) compounds trans-[PtCl2(Ph2C=NH)(RR'SO)] [R, R'=Me, Me (2); n-Pr, n-Pr (3); (CH2)4 (4); Me, Ph (5); Me, p-MeC6H4 (6)] were prepared by the reaction of Ph2C=NH with K[PtCl3(RR'SO)], obtained in situ from K2[PtCl4] and the corresponding sulfoxide, giving 2-6 as well as cis-[PtCl2(Ph2C=NH)2] (1) as a minor product. The complexes were characterized by 1H, 13C, and 195Pt NMR and IR spectroscopy, electrospray ionization mass spectrometry, and C, H, and N elemental analysis. The X-ray crystallography of 1 enables confirmation of the cis configuration of the complex, while in 2 and 4.1/2CHCl3, the imine and sulfoxide ligands are mutually trans. The solid-state structure of 4.1/2CHCl3 consists of two dimeric Pt moieties representing a rather weak Pt...Pt interaction. The dimeric architecture of 4.1/2CHCl3 is enhanced by the hydrogen bonding between imine H atoms and O atoms. The orthometalation of 1 and 2-6 proceeds both in the solid phase and in a toluene suspension, leading to the formation of [PtCl{Ph(C6H4)C=NH}(Ph2C=NH)] (7) and [PtCl{Ph(C6H4)C=NH}(RR'SO)] (8-12), respectively, isolated in nearly quantitative yields. Complexes 8-12 are emissive at room temperature both in solution (lambdaemmax approximately 535 nm) and in the solid state (lambdaemmax 560-610 nm), with excited-state lifetimes of ca. 300-600 ns, representing a new family of PtII-based luminescent complexes. Compounds 8 and 10 have been characterized by X-ray analysis, confirming the square-planar coordination geometry of the metal center with the almost planar platinacycles. In 8, the asymmetric unit contains two independent Pt molecules, while in 10, it includes four Pt molecules linked by the intermolecular hydrogen-bonding network between the NH group and Cl atoms.
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Gushchin PV, Bokach NA, Luzyanin KV, Nazarov AA, Haukka M, Kukushkin VY. PtII-Mediated Nitrile−Tetramethylguanidine Coupling as a Key Step for a Novel Synthesis of 1,6-Dihydro-1,3,5-triazines. Inorg Chem 2007; 46:1684-93. [PMID: 17266300 DOI: 10.1021/ic061884b] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The coupling between tetramethylguanidine, HN=C(NMe2)2, and coordinated organonitriles in the platinum(II) complexes cis/trans-[PtCl2(RCN)2] (R = Me, Et, Ph) proceeds rapidly under mild conditions to afford the diimino compounds containing two N-bound monodentate 1,3-diaza-1,3-diene ligands [PtCl2{NH=C(R)N=C(NMe2)2}2] (R = Et, trans-1; R = Ph, trans-2; R = Me, cis-3; R = Et, cis-4), and this reaction is the first observation of metal-mediated nucleophilic addition of a guanidine to ligated nitrile. Complexes 1-4 were characterized by elemental analyses (C, H, N), X-ray diffraction, FAB mass spectrometry, IR, and 1H and 13C{1H} NMR spectroscopies; assignment of signals from E/Z-forms of 1,3-diaza-1,3-diene ligands and verification of routes for their Z right harpoon over left harpoon E isomerization in solution were performed using 2D 1H,1H-COSY, 1H,13C-HETCOR, and 1D NOE NMR experiments. The newly formed and previously unknown 1,3-diaza-1,3-dienes NH=C(R)N=C(NMe2)2 were liberated from the platinum(II) complexes [PtCl2{NH=C(R)N=C(NMe2)2}2] (1-3) by substitution with 2 equiv of 1,2-bis-(diphenylphosphino)ethane (dppe) to give the uncomplexed HN=C(R)N=C(NMe2)2 species (5-7) in solution and the solid [Pt(dppe)2](Cl)2. The former were utilized in situ, after filtration of the latter, in the reaction with 1,3-di-p-tolylcarbodiimide, (p-tol)N=C=N(tol-p), in CDCl3 to generate (6E)-N,N-dimethyl-1-(4-methylphenyl)-6-[(4-methylphenyl)imino]-1,6-dihydro-1,3,5-triazin-2-amines) (8-10) due to the [4 + 2]-cycloaddition accompanying elimination of HNMe2. The formulation of 8-10 is based on ESI-MS, 1H, 13C{1H} NMR, and X-ray crystal structures determined for 9 and 10. The reaction of 1,3-diaza-1,3-dienes with 1,3-di-p-tolylcarbodiimide, described in this article, constitutes a novel synthetic approach to a useful class of heterocyclic species like 1,6-dihydro-1,3,5-triazines.
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Affiliation(s)
- Pavel V Gushchin
- Saint Petersburg State University, 198504 Stary Petergof, Russian Federation, Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Avenida Rovisco Pais, 1049-01 Lisbon, Portugal
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Lasri J, Adília Januário Charmier M, da Silva MFCG, Pombeiro AJL. Mixed unsymmetric oxadiazoline and/or imine platinum(ii) complexes. Dalton Trans 2007:3259-66. [PMID: 17893771 DOI: 10.1039/b704329e] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Iminoacylation of acetone oxime Me(2)C[double bond, length as m-dash]NOH upon reaction with trans-[PtCl(2)(NCCH(2)CO(2)Me)(2)] and [2 + 3] cycloaddition of acyclic nitrone (-)O(+)N(Me) = C(H)(C(6)H(4)Me-4) to a nitrile ligand in lead to the formation of mono-imine trans-[PtCl(2)(imine-a)(NCCH(2)CO(2)Me)] [imine-a = NH[double bond, length as m-dash]C(CH(2)CO(2)Me)ON = CMe(2)] and mono-oxadiazoline trans-[PtCl(2)(oxadiazoline-a)(NCCH(2)CO(2)Me)] [oxadiazoline-a = [upper bond 1 start]N[double bond, length as m-dash]C(CH(2)CO(2)Me)ON(Me)C[upper bond 1 end](H)(C(6)H(4)Me-4)] unsymmetric mixed ligand complexes, respectively, as the main products. Reactions of or with acetone oxime , cyclic nitrone (-)O(+)N = CHCH(2)CH(2)C[upper bond 1 end]Me(2) or N,N-diethylhydroxylamine give access, in moderate to good yields, to the unsymmetric mixed ligand oxadiazoline and/or imine complexes trans-[PtCl(2)(oxadiazoline-a)(imine-a)] , trans-[PtCl(2)(oxadiazoline-a)(oxadiazoline-b)] [oxadiazoline-b = [upper bond 1 start]N[double bond, length as m-dash]C(CH(2)CO(2)Me)O[lower bond 1 start]NC[upper bond 1 end](H)CH(2)CH(2)C[lower bond 1 end]Me(2)], trans-[PtCl(2)(imine-a)(imine-b)] [imine-b = NH = C(CH(2)CO(2)Me)ONEt(2)] or trans-[PtCl(2)(imine-a)(oxadiazoline-b)] . The cis mono-imine mixed ligand complex cis-[PtCl(2)(imine-a)(NCCH(2)CO(2)Me)] is the major product from the reaction of cis-[PtCl(2)(NCCH(2)CO(2)Me)(2)] with the oxime , while the di-imine compound cis-[PtCl(2)(imine-a)(2)] is a minor product. Reaction of cis-[PtCl(2)(imine-a)(NCCH(2)CO(2)Me)] with N,N-diethylhydroxylamine or the cyclic nitrone affords, in good yields, the unsymmetric mixed ligand complexes cis-[PtCl(2)(imine-a)(imine-b)] or cis-[PtCl(2)(imine-a)(oxadiazoline-b)] , respectively. All these complexes were characterized by elemental analyses, IR and (1)H, (13)C and (195)Pt NMR spectroscopies, and FAB(+)-MS. The X-ray structural analysis of trans-[PtCl(2){NH=C(CH(2)CO(2)Me)ON=CMe(2)}(NCCH(2)CO(2)Me)] is also reported.
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Affiliation(s)
- Jamal Lasri
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, TU Lisbon, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
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Kuznetsov ML, Kozlova LV, Dement’ev AI. Theoretical study of 1,3-dipolar cycloaddition of nitrones to doubly activated nitriles. RUSS J INORG CHEM+ 2006. [DOI: 10.1134/s0036023606100147] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Holmes KE, Kelly PF, Dale SH, Elsegood MRJ. New observations of structural diversity in copper(ii) complexes of diphenylsulfimide. CrystEngComm 2006. [DOI: 10.1039/b601230b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kuznetsov ML, Nazarov AA, Pombeiro AJL. Protic Conversion of Nitrile into Azavinylidene Complexes of Rhenium, a Mechanistic Theoretical Study. J Phys Chem A 2005; 109:8187-98. [PMID: 16834205 DOI: 10.1021/jp0527913] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The mechanism of the protonation of the rhenium nitrile chloro-complexes [ReCl(NCCH3)(PH3)4] (2), taken as models of the real systems [ReCl(NCR)(dppe)(2)] (dppe = Ph2PCH2CH2PPh2), leading to the azavinylidene products [ReCl(NC(H)CH3)(PH3)4]+ (3) was investigated by theoretical methods at the B3LYP level of theory. Electrostatic and molecular orbital arguments and thermodynamic, kinetic, and steric factors are analyzed and indicate that the chlorine atom is the most probable site of the initial proton attack, although the direct protonation of the nitrile carbon atom is also possible as a concurrent process. For the cis-isomer of 2, the initially formed chloro-protonated species cis-[Re(ClH)(NCCH3)(PH3)4]+ further converts to the azavinylidene cis-3 via either an acid-independent 1,4-proton shift or an acid-base catalyzed pathway involving a second protonation of the nitrile carbon atom to give cis-[Re(ClH)(NC(H)CH3)(PH3)4]2+ followed by elimination of the proton from the chlorine atom.
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Affiliation(s)
- Maxim L Kuznetsov
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
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Kumar PS, Singh P, Uppal P, Bharatam PV. Electronic Structure of Sulfimides: A Theoretical Study. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2005. [DOI: 10.1246/bcsj.78.1417] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bokach NA, Kuznetsova TV, Simanova SA, Haukka M, Pombeiro AJL, Kukushkin VY. Nitrile−Amidine Coupling at Pt(IV) and Pt(II) Centers. An Easy Entry to Imidoylamidine Complexes. Inorg Chem 2005; 44:5152-60. [PMID: 15998045 DOI: 10.1021/ic050037q] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Treatment of trans-[PtCl4(RCN)2] (R = Me, Et, Ph, NEt2) with 2 equiv of the amidine PhC(=NH)NHPh in a suspension of MeCN (R = Me), CHCl3 (R = Et, Ph), or in CHCl3 solution (R = NEt2) results in the formation of the imidoylamidine complexes trans-[PtCl4{NH=C(R)N=C(Ph)NHPh}2] (1-4) isolated in good yields (66-84%). The reaction of soluble complexes 3 and 4 with 2 equiv of Ph3P=CHCO2Me in CH2Cl2 (40 degrees C, 5 h) leads to dehydrochlorination resulting in a chelate ring closure to furnish the platinum(IV) chelates [PtCl2{NH=C(R)NC(Ph)=NPh}2] (R = Ph, 5; R = NEt2, 6), accordingly, and the phosphonium salt [Ph3PCH2CO2Me]Cl. Treatment of 5 with 3 equiv of Ph3P=CHCO2Me at 50 degrees C for 5 d resulted in only a 30% conversion to the corresponding Pt(II) complex [Pt{NH=C(NEt2)NC(Ph)=NPh}2] (15). The reduction can be achieved within several minutes, when Ph2PCH2CH2PPh2 in CDCl3 is used. When the platinum(II) complex trans-[PtCl2(RCN)2] is reacted with 2 equiv of the amidine, the imidoylamidinato complexes [PtCl(RCN){NH=C(R)NC(Ph)=NHPh}] (8-11) and [PhC(=NH)NHPh] x HCl (7) are formed. The reaction of trans-[PtCl2(RCN)2] with 4 equiv of the amidine under a prolonged reaction time or treatment of [PtCl(RCN){NH=C(R)NC(Ph)=NHPh}] (8-11) with 2 more equiv of the amidine yields the complex bearing two chelate rings [Pt{NH=C(R)NC(Ph)=NHPh}2] (12-15). The treatment of cis-[PtCl2(RCN)2] (R = Me, Et) with the amidine gives ca. 50-60% yield of [PtCl2{NH=C(R)NHC(Ph)=NHPh}] (16 and 17). All of the platinum compounds were characterized by elemental analyses; FAB mass spectrometry; IR spectroscopy; 1H, 13C{1H}, and 195Pt NMR spectroscopies, and four of them (4, 6, 8, and 15) were also characterized by X-ray crystallography. The coupling of the Pt-bound nitriles and the amidine is metal-mediated insofar as RCN and PhC(=NH)NHPh do not react in the absence of the metal centers in conditions more drastic than those of the observed reactions. The nitrile-amidine coupling reported in this work constitutes a route to the synthesis of imidoylamidine complexes, some of them exhibiting luminescent properties.
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Affiliation(s)
- Nadezhda A Bokach
- St. Petersburg State University, 198504 Stary Petergof, Russian Federation
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Synthesis and characterisation of the amidine complexes trans-[PtCl(NH3){HNC(NH2)R}2]Cl (R=Me, Ph, CH2Ph) derived from addition of NH3 to the coordinated nitriles in trans-[PtCl2(NCR)2]. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2005.01.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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43
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Makarycheva-Mikhailova AV, Tronova EA, Kukushkin VY. Synthesis of amidine complexes by metal-mediated addition of amino acid esters to coordinated nitriles. Russ Chem Bull 2005. [DOI: 10.1007/s11172-005-0330-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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44
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Bokach NA, Kukushkin VY, Kelly PF, Haukka M, Pombeiro AJL. The first examples of metal-mediated addition of a phosphorus imine to nitriles; the preparation and X-ray crystal structures of [PtCl4{NHC(Et)NPPh3}2] and [PtCl2(EtCN){NHC(Et)NPPh3}]. Dalton Trans 2005:1354-6. [PMID: 15824771 DOI: 10.1039/b502970h] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Imino(triphenyl)phosphorane, Ph3P=NH (1), reacts with nitrile complexes of Pt(IV) to generate hydrolytically sensitive [PtCl4{NH=C(R)N=PPh3}2](R=Me 2a, Et 2b, Ph 2c), and with the Pt(II) complex [PtCl2(EtCN)2] to give [PtCl2(EtCN){NH=C(Et)N=PPh3}](3) and [PtCl2{NH=C(Et)N=PPh3}2](4); X-ray crystallography performed upon (2b) and (3) confirms the presence of an imine/nitrile addition ligand bound by the terminal nitrogen.
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Affiliation(s)
- Nadezhda A Bokach
- St. Petersburg State University, 198904, Stary Petergof, Russian Federation.
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45
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Clegg W, Dale SH, Drennan D, Kelly PF. The use of the bromosulfimide Ph2SNBr as nitrogen source in reactions with selenium-based systems. Dalton Trans 2005:3140-2. [PMID: 16172635 DOI: 10.1039/b509382a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The N-bromosulfimide Ph(2)S=NBr reacts with a range of selenium sources including, uniquely, elemental selenium itself, to generate the explosive nitride Se(4)N(4).
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Affiliation(s)
- William Clegg
- School of Natural Sciences (Chemistry), Bedson Building, University of Newcastle upon Tyne, Newcastle upon Tyne NE1 7RU, UK
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46
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Makarycheva-Mikhailova AV, Selivanov SI, Bokach NA, Kukushkin VY, Kelly PF, Pombeiro AJL. Nucleophilic addition of bifunctional sulfimidosulfides to platinum(IV)-coordinated nitriles. Russ Chem Bull 2004. [DOI: 10.1007/s11172-005-0017-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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47
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Bokach NA, Pakhomova TB, Kukushkin VY, Haukka M, Pombeiro AJL. Hydrolytic metal-mediated coupling of dialkylcyanamides at a Pt(IV) center giving a new family of diimino ligands. Inorg Chem 2004; 42:7560-8. [PMID: 14606852 DOI: 10.1021/ic034800x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Addition of excess R(2)NCN to an aqueous solution of K(2)[PtCl(4)] led to the precipitation of [PtCl(2)(NCNR(2))(2)] (R(2) = Me(2) 1; Et(2) 2; C(5)H(10) 3; C(4)H(8)O, 4) in a cis/trans isomeric ratio which depends on temperature. Pure isomers cis-1-3 and trans-1-3 were separated by column chromatography on SiO(2), while trans-4 was obtained by recrystallization. Complexes cis-1-3 isomerize to trans-1-3 on heating in the solid phase at 110 degrees C; trans-1 has been characterized by X-ray crystallography. Chlorination of the platinum(II) complexes cis-1-3 and trans-1-4 gives the appropriate platinum(IV) complexes [PtCl(4)(NCNR(2))(2)] (cis-5-7 and trans-5-8). The compound cis-6 was also obtained by treatment of [PtCl(4)(NCMe)(2)] with neat Et(2)NCN. The platinum(IV) complex trans-[PtCl(4)(NCNMe(2))(2)] (trans-5) in a mixture of undried Et(2)O and CH(2)Cl(2) undergoes facile hydrolysis to give trans-[PtCl(4)[(H)=C(NMe(2))OH](2)] (9; X-ray structure has been determined). The hydrolysis went to another direction with the cis-[PtCl(4)(NCNR(2))(2)] (cis-5-7) which were converted to the metallacycles [PtCl(4)[NH=C(NR(2))OC(NR(2))=NH]] (11-13) due to the unprecedented hydrolytic coupling of the two adjacent dialkylcyanamide ligands giving a novel (for both coordination and organic chemistry) diimino linkage. Compounds 11-13 and also 14 (R(2) = C(4)H(8)O) were alternatively obtained by the reaction between cis-[PtCl(4)(MeCN)(2)] and neat undried NCNR(2). The structures of complexes 11, 13, and 14 were determined by X-ray single-crystal diffraction. All the platinum compounds were additionally characterized by elemental analyses, FAB mass-spectrometry, and IR and (1)H and (13)C[(1)H] NMR spectroscopies.
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Affiliation(s)
- Nadezhda A Bokach
- Department of Chemistry, St Petersburg State University, 198504 Stary Petergof, Russian Federation
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48
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Affiliation(s)
- Vladimir V Grushin
- Central Research and Development, E I DuPont de Nemours & Co, Inc, Experimental Station, Wilmington, Delaware 19880-0328, USA
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49
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Aucott SM, Bailey MR, Elsegood MRJ, Gilby LM, Holmes KE, Kelly PF, Papageorgiou MJ, Pedrón-Haba S. Reactions of mono- and bis-N-bromosulfimides with thio-ether crowns, phosphines and selenides. NEW J CHEM 2004. [DOI: 10.1039/b316850f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Kopylovich MN, Pombeiro AJL, Fischer A, Kloo L, Kukushkin VY. Facile Ni(II)/Ketoxime-Mediated Conversion of Organonitriles into Imidoylamidine Ligands. Synthesis of Imidoylamidines and Acetyl Amides. Inorg Chem 2003; 42:7239-48. [PMID: 14577793 DOI: 10.1021/ic0349813] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Treatment of alkyl nitriles with NiX(2).6H(2)O (X = Cl, NO(3)) and 2-propanone oxime, followed by (X = Cl) addition of [i-Pr(4)N](NO(3)) for precipitation of the product, resulted in the formation of amidinium nitrates [RC([double bond]NH(2))NH(2)](NO(3)) (R = Me, Et, n-Pr). The reaction went to another direction with NiX(2).2H(2)O, i.e., the reaction between neat RCN (R = Me, Et, n-Pr, i-Pr, n-Bu, CH(2)Cl, CH(2)C(6)H(4)OMe-p) and NiCl(2).2H(2)O/2-propanone oxime (other ketoximes can also be used) gave the (imidoylamidine)Ni(II) complexes [Ni[N(H)[double bond]C(R)NHC(R)[double bond]NH](2)](2+) (1(2+)-7(2+)). The latter were isolated in good yields (65-91%) as the bis-chloride salts 1.Cl(2)-6.Cl(2) and the mixed salt 7.(Cl)(p-MeOC(6)H(4)CH(2)CO(2)). Remarkably, the latter transformation does not proceed at all if NiCl(2).2H(2)O or the ketoxime are taken alone. Liberation of imidoylamidines was performed for one alkyl-containing complex [2.Cl(2)] and one benzyl-containing complex [7.(Cl)(p-MeOC(6)H(4)CH(2)CO(2))], by (i) addition of HBF(4).Et(2)O to the acetonitrile solution of the complexes to yield [N(H)[double bond]C(R)NHC(R)[double bond]NH].2HBF(4) (R = Et 8 and R = CH(2)C(6)H(4)OMe-p 9) or (ii) substitution for ethanediamine (en) with following precipitation of the complex [Ni(en)(3)]Cl(2) with formation of free N(H)[double bond]C(R)NHC(R)[double bond]NH (R = Et 10 and R = CH(2)C(6)H(4)OMe-p 11). In contrast to the liberation in nonaqueous media, treatment of 2.Cl(2) and 7.(Cl)(p-MeOC(6)H(4)CH(2)CO(2)) with Na(2)EDTA.2H(2)O in water-methanol solutions led to substitution and hydrolysis to furnish the acyl amides [EtC([double bond]O)](2)NH (12) and [p-MeOC(6)H(4)CH(2)C([double bond]O)](2)NH (13). Alternatively, 12 and 13 were obtained by hydrolysis of 10 and 11 in water at pH ca. 8.5. It was shown that the oxime complexes trans-[NiCl(2)(C(4)H(8)C[double bond]NOH)(4)] (14) or cis-[Ni(O,O-NO(3))(2)(C(4)H(8)C[double bond]NOH)(2)] (15) can be intermediates in the formation of amidines and imidoylamidines. The sequence of the Ni(II)/oxime mediated formation of (imidoylamidine)Ni complexes and liberation (or hydrolytic liberation) of the ligands opens up a novel, facile and environmentally benign route to imidoylamidines and acyl amides.
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Affiliation(s)
- Maximilian N Kopylovich
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
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