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51.
Muharrem Diner Namk
zdemir Süleyman Gülcemal Bekir etinkaya 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(5):m228-m230
The title complex, [RhBr(C8H12)(C21H8N2F10)], has a slightly distorted pseudo‐square‐planar geometry. The whole molecule has an approximate mirror symmetry, with the mirror plane passing through the mid‐points of the two alkene bonds of the cycloocta‐1,5‐diene (COD) ligand. The average Rh—C(COD) distance is inversely related to the magnitude of the Rh—C(benzimidazole) distance in this type of compound. The molecules are stacked in columns running along the a axis. The crystal structure contains two types of intermolecular C—H...F interactions, as well as two weak π–π stacking interactions. 相似文献
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Sibel Demir Muharrem Dinçer Alaaddin Çukurovali ibrahim Yilmaz 《International journal of quantum chemistry》2012,112(4):1016-1028
The title compound, N′‐benzylidene‐N‐[4‐(3‐methyl‐3‐phenyl‐cyclobutyl)‐thiazol‐2‐yl]‐chloro‐acetic acid hydrazide, has been synthesized and characterized by elemental analysis, IR, 1H and 13C NMR, and X‐ray single crystal diffraction. The compound crystallizes in the orthorhombic space group P 21 21 21 with a = 5.8671 (3) Å, b = 17.7182 (9) Å, and c = 20.6373 (8) Å. Moreover, the molecular geometry from X‐ray experiment, the molecular geometry, vibrational frequencies, and gauge‐including atomic orbital 1H and 13C chemical shift values of the title compound in the ground state have been calculated by using the Hartree–Fock and density functional methods (B3LYP) with 6‐31G(d) and 6‐31G(d,p) basis sets. The results of the optimized molecular structure are exhibited and compared with the experimental X‐ray diffraction. Besides, molecular electrostatic potential, Frontier molecular orbitals, and thermodynamic properties of the title compound were determined at B3LYP/6‐31G(d) levels of theory. © 2011 Wiley Periodicals, Inc. Int J Quantum Chem, 2012 相似文献
53.
Sahin M Koca A Ozdemir N Dinçer M Büyükgüngör O Bal-Demirci T Ulküseven B 《Dalton transactions (Cambridge, England : 2003)》2010,39(42):10228-10237
The stable uranyl complexes, [UO(2)(L)C(9)H(19)OH], were obtained from 3,5-dichlorosalicyl-(L(I)) and salicyl-aldehyde-S-propyl-thiosemicarbazones (L(II)) with substituted-salicylaldehyde in nonyl alcohol. The structures of the complexes have been characterized by elemental analysis, IR, (1)H NMR, conductivity, magnetic moment measurements, cyclic voltammetry, thermal gravimetric analysis and single crystal X-ray diffraction technique. The U(VI) centre is seven-coordinated in a distorted pentagonal bipyramidal geometry. The relative orientations of the nonyl alcohol and S-propyl group in the title complexes are completely different due to different crystal packing. Electrochemical behaviors of the thiosemicarbazone ligands and the uranyl complexes were studied using cyclic voltammetry and square wave voltammetry. Redox processes of the compounds are significantly influenced by the central metal ions and the nature of substituents on the thiosemicarbazones, which are important factors in controlling the redox properties. In situ spectroelectrochemical studies were employed to determine the colors and spectra of electro-generated species of the complexes. 相似文献
54.
Şükriye Güveli Namık Özdemir Tülay Bal-Demirci Bahri Ülküseven Muharrem Dinçer Ömer Andaç 《Polyhedron》2010
Reaction of 2-hydroxyacetophenone thiosemicarbazone with [Ni(PPh3)2Cl2] in optimized conditions afforded a mixed ligand complex with an isolated triphenylphosphine molecule. The structure was characterized by elemental analysis, IR, NMR and UV–Vis. spectroscopies and single crystal X-ray diffraction technique. In addition, the molecular geometry, vibrational frequencies and gauge including atomic orbital (GIAO) 1H and 13C NMR chemical shift values of the title compound in the ground state have been calculated using the density functional theory (DFT/B3LYP) method with the 6-31G(d,p) basis set for the C, N, O, S, P, H atoms and LANL2DZ pseudo-potential for the Ni atom, and compared with the experimental data. Besides, atomic charge distributions, molecular electrostatic potential and frontier molecular orbitals (FMO) analysis of the title compound were investigated by theoretical calculations. The thermodynamic properties of the compound at different temperatures have been calculated and corresponding relations between the properties and temperature have also been obtained. Atomic charge distributions indicate that during forming the title compound, the free ligand of thiosemicarbazone ion transfers their negative charges to central Ni(II) ion. The effect of different solvents (chloroform, methanol and water) on the geometry, vibrational frequencies, total energies and dipole moments was studied using the density functional theory (DFT/B3LYP) method by applying the Onsager and the Polarizable Continuum Model (PCM). 相似文献
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56.
Muharrem Kaya 《中国化学》2011,29(11):2355-2360
By the cyclization of 4,4‐dimethylcyclohexane‐1,3‐dione with different aromatic aldehydes, the xanthene regioisomers were obtained. The diversity of xanthene isomers could be determined. The electronic and steric effects on aromatic aldehydes could be observed. 相似文献
57.
Twenty-two new 3,4,5-trisubstituted 1,2,4,5-oxadiazaboroles were prepared by the cyclocondensation reaction of N-substituted thiophene, furan and pyridine carboxamidoximes with phenylboronic acid in refluxing toluene in good yields. The structures of the new oxadiazaboroles were elucidated by means of spectral measurements (IR, 1H, 13C, 11B NMR, MS, X-ray) and physical data (melting points, elemental compositions by HRMS). 相似文献
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