CRYSTAL STRUCTURES OF TWO N-HETEROCYCLIC CARBENE-PALLADACYCLES

N-heterocyclic carbene palladacycle C—HѱCl hydrogen bond SѱS interaction.

МОЛЕКУЛЯРНАЯ И ДИССОЦИАТИВНАЯ АДСОРБЦИЯ МОЛЕКУЛЫ ДИЭТИЛСУЛЬФИДА НА ГРАНЯХ (010) И (001) НАНОЧАСТИЦЫ TiO2 МОДИФИКАЦИИ АНАТАЗ, ЗВЕЗДООБРАЗНЫЕ ПОЛИМЕРЫ ДЕКСТРАН—ПОЛИАКРИЛАМИД: ПЕРСПЕКТИВЫ ПРИМЕНЕНИЯ В НАНОТЕХНОЛОГИЯХ, ...

2015. 56, 5 UDC 548.73 CRYSTAL STRUCTURES OF TWO N-HETEROCYCLIC CARBENE-PALLADACYCLES H.M. Li1, X.Q. Li u 1, Z. Q. Wang2, W.J. Fu2, C. Xu 2 1College of Life Science, Luoyang Normal University, Luoyang, Henan, P. R. China 2College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan, P. R. China E-mail: xubohan@163.com Received December, 14, 2014 teractions are found in the crystals. <...> Among them, a combination of a palladacycle framework with highly donating and sterically demanding NHCs has been reported [ 3—8]. <...> These adducts were far more active than the corresponding dimeric palladacycle. <...> Recently, we have investigated fluorescent NHC-cyclopalladated 2-(4-ethylphenyl)pyrazine and 2-(4-methoxyphenyl)pyrazine complexes [ 12 ]. <...> As a part of our continuous research work, herein, the structures of two NHC [N,N-bis((1,3-di-4-methyl-phenyl)-imidazol)-2ylidene]-palladacycles are determined by single crystal X-ray diffraction. <...> Single crystals suitable for X-ray diffraction were obtained by recrystallization from a CH2Cl2-petroleum ether solution at room temperature. <...> Single crystal X-ray diffraction data of complex 1 and 2 were collected on a Xcalibur, Eos, Gemini diffractometer with graphite-monochromated Mo h radiation (y = 0.071073 nm). <...> In the final step of the crystal structure refinement, hydrogen atoms of idealized —CH2 and —CH3 groups were added and treated with the riding atom mode; their isotropic displacement factor was chosen as 1.2 and 1.5 times the preceding carbon atom, respectively. <...> Crystal data and experimental details of the structure determinations, selected bond distances and angles, and hydrogen bonding parameters are listed in Tables 1 and 2, respectively. <...> The X-ray diffraction data were deposited with the Cambridge Crystallographic Data Center (CCDC no. 1039124 for 1 and 1013221 for 2) and are available from the authors at www.ccdc.cam.ac.uk/data_request/cif. Li H.M., Liu X.Q., Wang Z.Q., Fu W.J., Xu C., 2015 Revised — February, 21, 2015 The crystal structures of two N-heterocyclic carbene (NHC)-palladacycles are determined by single crystal X-ray diffraction. <...> Although many structures of palladacycles have been determined <...>

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