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Jagadese J. Vittal - One of the best experts on this subject based on the ideXlab platform.

  • guest triggered supramolecular Isomerism in a pillared layer structure with unusual Isomers of paddle wheel secondary building units by reversible single crystal to single crystal Transformation
    Chemistry: A European Journal, 2013
    Co-Authors: Inhyeok Park, Jagadese J. Vittal
    Abstract:

    : Solvothermal reaction of Zn(NO(3))(2)·4H(2)O, 1,4-bis[2-(4-pyridyl)ethenyl]benzene (bpeb) and 4,4'-oxybisbenzoic acid (H(2)obc) in the presence of dimethylacetamide (DMA) as one of the solvents yielded a threefold interpenetrated pillared-layer porous coordination polymer with pcu topology, [Zn(2)(bpeb)(obc)(2)]·5H(2)O (1), which comprised an unusual Isomer of the well-known paddle-wheel building block and the Trans-Trans-Trans Isomer of the bpeb pillar ligand. When dimethylformamide (DMF) was used instead of DMA, a supramolecular Isomer [Zn(2)(bpeb)(obc)(2)]·2DMF·H(2)O (2), with the Trans-Cis-Trans Isomer of the bpeb ligand with a slightly different variation of the paddle-wheel repeating unit, was isolated. In MeOH, single crystals of 2 were Transformed by solvent exchange in a single-crystal-to-single-crystal (SCSC) manner to yield [Zn(2)(bpeb)(obc)(2)]·2H(2)O (3), which is a polymorph of 1. SCSC conversion of 3 to 2 was achieved by soaking 3 in DMF. Compounds 1 and 2 as well as 2 and 3 are supramolecular Isomers.

Sergienko V.s. - One of the best experts on this subject based on the ideXlab platform.

  • Synthesis and crystal structure of (1H-Benzo[d]imidazol-2-yl)(3,3-dimethyl- 3,4-dihydroisoquinolin-1-yl)methanone (L). complex formation of copper(II) and cobalt(II) chlorides with L
    2020
    Co-Authors: Sokol V.i., Davydov V.v., Skarzhevskii Yu.a., Shklyaev Yu.v., Sergienko V.s.
    Abstract:

    (1H-Benzo[d]imidazol-2-yl)(3,3-dimethyl-3,4-dihydroisoquinolin-1-yl) methanone (L) and its complexes with copper and cobalt chlorides [CuLCl 2] (I) and [CoLCl2] (II) are synthesized and studied by IR spectroscopy. The structure of molecule L is determined by X-ray diffraction analysis. Molecule L crystallizes as a Cis-Trans Isomer. The dihydroisoquinoline (A) and benzimidazole (B) fragments lie in the mutually perpendicular planes. The N-C bond lengths of fragment A (double bond N(1)-C(1) 1.278(3) Å, ordinary bond N(1)-C(9) 1.490(3) Å) differ noticeably. The N-C bond lengths in fragment B range from 1.327(4) to 1.389(4) Å. The C=O bond is 1.218(3) Å According to the data of IR spectroscopy and X-ray diffraction analysis, complexes I and II are assumed to have different structures with different coordination modes to the metal atom of molecule L: through the imine atoms N(1) and N(2) of fragments A and B in I and through the N(1) atom of the dihydroisoquinoline fragment and the O atom of the carbonyl group in II. © 2011 Pleiades Publishing, Ltd

  • Synthesis, crystal structure, and spectra of 9(E)-phenanthrene-9,10- dione[(1Z)-3,3-dimethyl-3,4-dihydroisoquinolin-1(2H)-ylidene]hydrazone and its cation-anion complex with copper(I) bromide
    IAPC Nauka Interperiodica, 2020
    Co-Authors: Davydov V.v., Sokol V.i., Shklyaev Yu.v., Rychagina N.v., Linko R.v., Sergienko V.s.
    Abstract:

    The reaction of 1-hydrazino-3,3-dimethyl-3,4-dihydroisoquinoline with 9,10-phenanthrenequinone gave (9E)-phenanthrene-9,10-dione[(1Z)-3,3-dimethyl-3, 4-dihydroisoquinolin-1(2H)-ylidene]hydrazone (L). The reaction of L with copper(II) bromide gave the complex (LH)[CuBr2]. The crystal structures of the monohydrate L • H2O (I) and the isolated complex (LH)[CuBr2] (II) were determined by X-ray diffraction. The structural units of I are pseudo-centrosymmetric dimers in which the L and water molecules are combined by strong hydrogen bonds. The active H atom is located at the N(1) atom of the isoquinoline fragment of the L molecule. The L molecule occurs in the crystal as the Cis, Trans Isomer with respect to exocyclic C=N bonds at the isoquinoline and phenanthrenequinone fragments, respectively. Complex II has a cation-anion structure. The LH+ cation as the Cis, Cis Isomer is protonated at N(2) and stabilized by two intramolecular hydrogen bonds. In the CuBr 2 - anion, the copper atom in the oxidation state +1 has a linear coordination, the C-Br bond length is 2.185(4) ± 0.005 Å, and the BrCuBr angle is 179.8(4)°. The main ion-ion interactions in structure II are shortened contacts involving bromine atoms, which combine cations and anions into a three-dimensional framework. © 2009 Pleiades Publishing, Ltd

V V Atuchin - One of the best experts on this subject based on the ideXlab platform.

  • the Cis Trans Isomer Transformation spectroscopic and thermal properties of li na k 1 3 diethyl 2 thiobarbiturate complexes
    Polyhedron, 2015
    Co-Authors: Nicolay N. Golovnev, Maxim S. Molokeev, Irina V. Sterkhova, V V Atuchin, S N Vereshchagin
    Abstract:

    Abstract Three new complexes of 1,3-diethyl-2-thiobarbituric acid (C8H11N2O2S, HDETBA) with Li+, Na+, K+ alkali ions were synthesized. The complexes have been prepared by neutralization of 1,3-diethyl-2-thiobarbituric acid with the corresponding metal hydroxide in aqueous solution. The colorless crystals have been investigated using X-ray single crystal and powder techniques and characterized by differential scanning calorimetry, thermogravimetry and infrared spectroscopy. The compounds of MDETBA with M = Li and M = Na crystallize in the monoclinic lattice with a = 10.678(1) A, b = 7.2687(9) A, c = 13.202(2) A, β = 108.841(2)°, Z = 4, V = 969.8(2) A3, S.G. P21/n and a = 10.534(2) A, b = 7.604(1) A, c = 14.186(1) A, β = 108.964(4)°, Z = 4, V = 1074.6(3) A3, S.G. P21/n, respectively. Сompound KDETBA crystallizes in the orthorhombic lattice with a = 4.2541(6) A, b = 14.739(2) A, c = 16.635(3) A, Z = 4, V = 1043.1(3) A3, S.G. P212121. In Li(I) and Na(I) complexes, the DETBA− ion is in Cis-configuration and, in the K(I) complex, this ion is in Trans-configuration. The reason for the Transformation from Cis- to Trans-configuration has been rationalized.

Davydov V.v. - One of the best experts on this subject based on the ideXlab platform.

  • Synthesis and crystal structure of (1H-Benzo[d]imidazol-2-yl)(3,3-dimethyl- 3,4-dihydroisoquinolin-1-yl)methanone (L). complex formation of copper(II) and cobalt(II) chlorides with L
    2020
    Co-Authors: Sokol V.i., Davydov V.v., Skarzhevskii Yu.a., Shklyaev Yu.v., Sergienko V.s.
    Abstract:

    (1H-Benzo[d]imidazol-2-yl)(3,3-dimethyl-3,4-dihydroisoquinolin-1-yl) methanone (L) and its complexes with copper and cobalt chlorides [CuLCl 2] (I) and [CoLCl2] (II) are synthesized and studied by IR spectroscopy. The structure of molecule L is determined by X-ray diffraction analysis. Molecule L crystallizes as a Cis-Trans Isomer. The dihydroisoquinoline (A) and benzimidazole (B) fragments lie in the mutually perpendicular planes. The N-C bond lengths of fragment A (double bond N(1)-C(1) 1.278(3) Å, ordinary bond N(1)-C(9) 1.490(3) Å) differ noticeably. The N-C bond lengths in fragment B range from 1.327(4) to 1.389(4) Å. The C=O bond is 1.218(3) Å According to the data of IR spectroscopy and X-ray diffraction analysis, complexes I and II are assumed to have different structures with different coordination modes to the metal atom of molecule L: through the imine atoms N(1) and N(2) of fragments A and B in I and through the N(1) atom of the dihydroisoquinoline fragment and the O atom of the carbonyl group in II. © 2011 Pleiades Publishing, Ltd

  • Synthesis, crystal structure, and spectra of 9(E)-phenanthrene-9,10- dione[(1Z)-3,3-dimethyl-3,4-dihydroisoquinolin-1(2H)-ylidene]hydrazone and its cation-anion complex with copper(I) bromide
    IAPC Nauka Interperiodica, 2020
    Co-Authors: Davydov V.v., Sokol V.i., Shklyaev Yu.v., Rychagina N.v., Linko R.v., Sergienko V.s.
    Abstract:

    The reaction of 1-hydrazino-3,3-dimethyl-3,4-dihydroisoquinoline with 9,10-phenanthrenequinone gave (9E)-phenanthrene-9,10-dione[(1Z)-3,3-dimethyl-3, 4-dihydroisoquinolin-1(2H)-ylidene]hydrazone (L). The reaction of L with copper(II) bromide gave the complex (LH)[CuBr2]. The crystal structures of the monohydrate L • H2O (I) and the isolated complex (LH)[CuBr2] (II) were determined by X-ray diffraction. The structural units of I are pseudo-centrosymmetric dimers in which the L and water molecules are combined by strong hydrogen bonds. The active H atom is located at the N(1) atom of the isoquinoline fragment of the L molecule. The L molecule occurs in the crystal as the Cis, Trans Isomer with respect to exocyclic C=N bonds at the isoquinoline and phenanthrenequinone fragments, respectively. Complex II has a cation-anion structure. The LH+ cation as the Cis, Cis Isomer is protonated at N(2) and stabilized by two intramolecular hydrogen bonds. In the CuBr 2 - anion, the copper atom in the oxidation state +1 has a linear coordination, the C-Br bond length is 2.185(4) ± 0.005 Å, and the BrCuBr angle is 179.8(4)°. The main ion-ion interactions in structure II are shortened contacts involving bromine atoms, which combine cations and anions into a three-dimensional framework. © 2009 Pleiades Publishing, Ltd

V S Sergienko - One of the best experts on this subject based on the ideXlab platform.

  • synthesis crystal structure and spectra of 9 e phenanthrene 9 10 dione 1z 3 3 dimethyl 3 4 dihydroisoquinolin 1 2h ylidene hydrazone and its cation anion complex with copper i bromide
    Russian Journal of Inorganic Chemistry, 2009
    Co-Authors: V V Davydov, V I Sokol, N V Rychagina, R V Linko, M A Ryabov, Yu V Shklyaev, V S Sergienko
    Abstract:

    The reaction of 1-hydrazino-3,3-dimethyl-3,4-dihydroisoquinoline with 9,10-phenanthrenequinone gave (9E)-phenanthrene-9,10-dione[(1Z)-3,3-dimethyl-3,4-dihydroisoquinolin-1(2H)-ylidene]hydrazone (L). The reaction of L with copper(II) bromide gave the complex (LH)[CuBr2]. The crystal structures of the monohydrate L · H2O (I) and the isolated complex (LH)[CuBr2] (II) were determined by X-ray diffraction. The structural units of I are pseudo-centrosymmetric dimers in which the L and water molecules are combined by strong hydrogen bonds. The active H atom is located at the N(1) atom of the isoquinoline fragment of the L molecule. The L molecule occurs in the crystal as the Cis, Trans Isomer with respect to exocyclic C=N bonds at the isoquinoline and phenanthrenequinone fragments, respectively. Complex II has a cation-anion structure. The LH+ cation as the Cis, Cis Isomer is protonated at N(2) and stabilized by two intramolecular hydrogen bonds. In the CuBr 2 − anion, the copper atom in the oxidation state +1 has a linear coordination, the C-Br bond length is 2.185(4) ± 0.005 A, and the BrCuBr angle is 179.8(4)°. The main ion-ion interactions in structure II are shortened contacts involving bromine atoms, which combine cations and anions into a three-dimensional framework.