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Your search keyword '"Zhu, Dun-ru"' showing total 25 results
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25 results on '"Zhu, Dun-ru"'

23. Substituted group-directed assembly of six coordination compounds based on pyrazole bifunctional ligands

Author

Shen, Lei, Ma, Qian-Qian, Liu, Qing, Jia, Tian-Tian, Xu, Yue, Zhu, Ting, Zhu, Dun-Ru, and Yang, Jie

Abstract

Six new complexes [Mn8(μ4-O)4(phpz)8(MeOH)4]·(MeOH)(H2O) (1) [Co2(HphpzH)(Hphpz)2(phpz)2]·4(MeOH) (2), Ni(Hphpz)2(3), [Ni(Hphpz)2]·H2O (4), [Zn4(pzpy)4Cl4] (5) and [Cu2(pzpy)2(HCO2)2(H2O)2] (6) have been synthesized by hydrothermal reactions of MCl2·4H2O (M = Mn, Co, Ni, Zn or Cu) with 5-(2-hydroxyphenyl)-3-pyrazole (HphpzH) or 2-(1H-pyrazol-3-yl)pyridine (Hpzpy). The complexes were characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. Complex 1is an octanuclear Mn(III) cluster, complexes 2and 6are binuclear Co(III) and Cu(II), respectively, complexes 3and 4are isomorphous mononuclear species, while complex 5is a tetranuclear Zn(II) cluster. The magnetic behavior of complex 1was investigated. Magnetic susceptibility measurements revealed antiferromagnetic exchange interactions between the metal centers in the clusters. The luminescence properties of the complexes were investigated at room temperature in the solid state.

Published
2018
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24. One-Pot Synthesis of Highly Substituted 1H-Pyrazole-5-carboxylates from 4-Aryl-2,4-diketoesters and Arylhydrazines.

Author

Zhai, Jiao ‐ Jiao, Gu, Chun ‐ Hui, Guo, Ying, Liao, Dao ‐ Hua, Zhu, Dun ‐ Ru, and Ji, Ya ‐ Fei

Subjects
PYRAZOLES, CARBOXYLATES, X-ray crystallography, HETEROCYCLIC compounds synthesis, CONDENSATION
Abstract

A of highly substituted 1 H-pyrazole-5-carboxylates 1 has been developed starting from easily available 4-aryl-2,4-diketoesters 2 and arylhydrazine hydrochlorides 3. More active 2-carbonyl group of 2 was blocked with methoxyamine hydrochloride to give 2-methoxy imine intermediates, which were then subjected to condensation with 3 in situ to provide the desired products 1. In addition, the geometrical configuration of 1aa was unambiguously confirmed by single crystal X-ray crystallography. [ABSTRACT FROM AUTHOR]

Published
2016
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25. One-pot Synthesis of a 3,4,5-Triaryltriazole from the Subsitituted 1,3,4-Oxadiazole: Crystal Structures Characterization.

Author

Jiang, Jing ‐ Jing, Shen, Guo ‐ Ping, He, Xin, Shen, Xuan, and Zhu, Dun ‐ Ru

Subjects
TRIAZOLES synthesis, OXADIAZOLES, HETEROCYCLIC compounds synthesis, SUBSTITUTION reactions, CRYSTAL structure, HYDROGEN bonding
Abstract

Two heterocyclic compounds, 2-( p-bromophenyl)-5-(2-pyridyl)-1,3,4-oxadiazole ( 1) and 3-( p-bromophenyl)-4-phenyl-5-(2-pyridyl)-1,2,4-triazole ( 2) were successfully synthesized and characterized by UV-vis, FTIR, 1H NMR, ESI-MS spectra, elemental analysis, and single crystal X-ray crystallography. The structural analysis indicates that 1 is almost a planar molecule but 2 not. The crystal structure of 1 is stabilized by two kinds of π-π interactions and two types of C-H···N hydrogen bonds, whereas 2 by three kinds of C-H···π interactions and three types of C-H···N hydrogen bonds. Additional, 2 can be prepared directly from 1 in an aniline solution at 190°C in a yield of 70%. [ABSTRACT FROM AUTHOR]

Published
2014
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