69506-85-0Relevant academic research and scientific papers
Tetrakis(imidazolium) macrocyclic receptors for anion binding
Wong, Wallace W. H.,Vickers, Matthew S.,Cowley, Andrew R.,Paul, Rowena L.,Beer, Paul D.
, p. 4201 - 4208 (2005)
New (tetrakis)imidazolium macrocyclic receptor systems of variable cavity size have been synthesised by stepwise alkylation reactions of bis(imidazolium) precursor compounds. Proton NMR titration studies reveal the macrocycles to strongly bind halide and benzoate anions, with two receptor systems displaying notable selectivity for fluoride in competitive acetonitrile-water (9:1) solvent media. The Royal Society of Chemistry 2005.
Syntheses and structural characterization of Cu(II) and Mn(II) coordination polymers with the neutral flexible bidentate N-donor ligands
Lalegani, Arash,Khaledi Sardashti, Mohammad,Khalaj, Mehdi,Gajda, Roman,Wo?niak, Krzysztof
, p. 136 - 144 (2017)
Four new coordination polymers of [Cu(μ-bip)2(N3)2·2H2O]n(1), [Cu(μ-bbd)2(μ4-N3)4]n(2), [Mn(μ-bip)2(NCS)2]n(3) and [Mn(μ-bip)2(N3)2]n(4) were prepared by using the neutral N-donor ligands 1,3-bis(imidazolyl)propane (bip) and 1,4-bis(3,5-dimethylpyrazolyl)butane (bbd), mono-anionic NCS?or N3?ligands and appropriate metal salts of Cu(II) and Mn(II) ions. The results of the X-ray measurements demonstrate that in the crystal structure of 1, 3 and 4 the metal ions adopts MN6(M = Cu, Mn) an octahedral geometry while, in the structure of 2, the copper(II) ion forms CuN5trigonal bipyramides. In the polymer 1, 3 and 4 the N3?or NCS?groups are terminally bonded to the metal center and each bip ligand with anti-gauche conformation acts as bridging ligand connecting two metal ions to form a one-dimensional zig-zag chain. Whereas in the polymer 2, the N3groups adopt so called End-on mode of connection with metal center and the each bbd with anti-anti-anti conformation acts as bridging connecting two copper(II) ions to form a two-dimensional network with a hcb [point symbol (36)] topology. Compounds 1, 3 and 4 are isostructural with each other.
Homoleptic crown N-heterocyclic carbene complexes
McKie, Ross,Murphy, John A.,Park, Stuart R.,Spicer, Mark D.,Zhou, Sheng-Ze
, p. 6525 - 6528 (2007)
(Figure Presented) Two ways about it: The first metal N-heterocyclic carbene complexes derived from a cyclic tetraimidazolium salt show a remarkable versatility of ligand conformation and coordination geometry. With Pd II, a mononuclear square-planar complex is obtained, but with Cu I and AgI, an unprecedented dinuclear motif with a short metal-metal interaction is observed (see structure; N blue, C white ellipsoids, H white circles).
Reactivity of Ruthenium(II) Complexes Bearing Bis-NHC Ligands
Dutschke, Patrick D.,Hahn, F. Ekkehardt,Hepp, Alexander,Lübbering, Tobias
supporting information, p. 3775 - 3784 (2021/11/17)
Bis-imidazolium salts bearing N-2-fluorobenzyl substituents and methylene, ethylene, or propylene linkers ([H2-4]Br2-[H2-6]Br2) and the bis-imidazolium salt [H2-8]Br2 featuring an ethylene linker and N-3-fluorophenyl substituents have been prepared. Salts [H2-5]Br2 and [H2-6]Br2 react with [RuCl2(CO)2]n to give the bis-NHC chelate complexes [9] and [10]. Chloride substitution in [10] for the 2-nitrophenyl isocyanide ligand 11 yielded the complex [12]PF6. The nitro group of the isocyanide in [12]PF6 could not be reduced. Salts [H2-4]Br2 and [H2-5]Br2 yield with [RuCp*(MeCN)3]PF6 the chelate complexes [13]PF6 and [14]PF6, respectively. The propylene-bridged bis-imidazolium salt [H2-6]Br2 reacts with [RuCp*(MeCN)3]PF6 to give, via an oxidative addition of a C-H bond of the central methylene group of the linker, the seven-coordinate RuIV complex [15]PF6 bearing a tridentate CNHCCalkylCNHC ligand and a hydrido ligand. Introduction of a nitrophenyl isocyanide ligand to [14]PF6 and reduction of the nitro group to the primary amine was also possible. Finally, [H2-8]Br2 reacts with [RuCp*(MeCN)3]PF6 to give, after intramolecular oxidative addition of a Caryl-H bond followed by reductive elimination of an imidazolium group, the complex [20]PF6 bearing a unique tridentate CarylCNHCC=Cimidazolium chelate ligand.
Catalytic assay of Schiff base Co(II), Ni(II), Cu(II) and Zn(II) complexes for N-alkylation of heterocycles with 1,3-dibromopropane
Chavan, Sanjay,Gaikwad, Gautam,Hegade, Sujit,Jadhav, Yuvraj,Mulik, Ganpatrao
, (2020/08/06)
Abstract: N-alkylation of heterocycles with 1,3-dibromopropane using Schiff base Co(II), Ni(II), Cu(II) and Zn(II) transition metal complexes as a catalyst was studied in 1:1 and 2:1 coupling ratios under mild conditions. It was observed that all the complexes worked as efficient catalyst with product yield 78–92percent for coupling ratio 1:1 and product yield 63–78percent for coupling ratio 2:1. N-alkylation of heterocycles with 1,3-dibromopropane in 1:1 coupling ratio is easier with higher yields as compared with N-alkylation in 2:1 coupling ratio. Graphic abstract: N-Alkylation of heterocycles with 1,3-dibromopropane[Figure not available: see fulltext.]
A amino-containing double-nuclear alkaline ionic liquid and its preparation method and application
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Paragraph 0035; 0036; 0037, (2017/09/26)
The invention discloses a novel amino-containing dual-core basic ionic liquid and a preparation method and an application thereof. The structure formula of the ionic liquid is as shown in the description, wherein n is 2, 3, 4, 5 or 6. The ionic liquid disclosed by the invention reacts with a bromine salt by virtue of a dual-core substance; the obtained substance contains a plurality of amino groups, is relatively high in alkalinity and relatively good in effect on carbon dioxide absorption, and can be repeatedly used for a plurality of times.
Synthesis and properties of dicationic ionic liquids containing a siloxane structural moiety
Glukhov,Krasovskiy,Chernikova,Kapustin,Kustov,Koroteev
, p. 2204 - 2209 (2015/11/17)
Five new ionic liquids formed by doubly charged cations containing a siloxane moiety and bis(trifluoromethylsulfonyl) imide anion are synthesized and characterized. Their thermal stability is studied by means of TGA; melting points (glass transition temperatures) and densities are measured. The temperature dependences of kinematic viscosity of the obtained ionic liquids are presented along with their approximations by the Vogel-Tammann-Fulcher equation.
Synthesis and antitubercular screening of imidazole derivatives
Pandey, Jyoti,Tiwari, Vinod K.,Verma, Shyam S.,Chaturvedi, Vinita,Bhatnagar,Sinha,Gaikwad,Tripathi, Rama P.
experimental part, p. 3350 - 3355 (2009/12/01)
A series of imidazole based compounds were synthesized by reacting simple imidazoles with alkyl halides or alkyl halocarboxylate in presence of tetrabutylammonium bromide (TBAB). The compounds bearing carbethoxy group undergo amidation with different amines in the presence of DBU to give respective carboxamides. The synthesized compounds were screened against Mycobacterium tuberculosis where compound 17 exhibited very good in vitro antitubercular activity and may serve as a lead for further optimization.
Size selective recognition of anions by a tetracationic imidazoliophane
Sato, Kiyoshi,Onitake, Tomomi,Arai, Sadao,Yamagishi, Takamichi
, p. 779 - 784 (2007/10/03)
The reaction of 1:1 mixture of 1,3-bis(1-imidazolyl)propane and 1,4-bis(chloromethyl)durene gives a new tetracationic heterophane (2), which forms a 1:1 inclusion complex with halides and oxoanions in DMSO-d6 in the order of HSO4- > Br- > H2PO4- > Cl- > I- > ClO4- depending on the size of anions.
