期刊
INORGANICA CHIMICA ACTA
卷 530, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2021.120697
关键词
One-pot solvothermal synthesis; Nickel complex; Conformation alteration; Crystal structure; Magnetism
资金
- key scientific research projects in colleges and universities of henan province [21A150036]
- plan for science and technology innovation team in colleges and universities of henan province [21IRTSTHN004]
- Natural Science Foundation of China [U1804131]
Two new discrete compounds with similar structures have been synthesized and analyzed. Magnetic measurements suggest the presence of weak ferromagnetic coupling in compound 2.
Two new discrete compounds with the formula [Ni(3,5,6-tcpa)(2,2 & PRIME;-bipy)Cl] (1) and [Ni-2(3,5,6-tcpa)(2)(2,2 & PRIME;- bipy)(2)(ox)].2EtOH (2) (3,5,6-Htcpa = 2-((3,5,6-trichloro pyridin-2-yl)oxy)acetic acid, 2,2 & PRIME;-bipy = 2,2 & PRIME;-bipyridine, ox = oxalate dianion) have been co-synthesized under solvothermal conditions in the same medium. Single-crystal X-ray diffraction analysis shows that both 1 and 2 have crystallized in triclinic system, space group P(1) over bar and the central Ni-II ions are both in deformed square-pyramids. The Ni-II ion in 1 was bonded by one chloride ion (Cl-), one bidentate chelate 3,5,6-tcpa anion and one 2,2 & PRIME;-bipy to give a mononuclear complex 1. While for 2, the Ni-II ion was coodinated with one monodentate 3,5,6-tcpa, one oxalate anion and one 2,2 & PRIME;-bipy. The oxalate anion linked two equivalent NiII ions to form the binuclear cluster 2. The Cl...Cl halogen bonds, pi...pi stacking interactions and/or O-H...O hydrogen bonds play an important part in the crystal packing for 1 and 2. Their deeply structural analyses revealed that the similar structure features and conformation alteration of 3,5,6-tcpa may be responsible for the cocrystallization phenomenon of 1 and 2. The magnetic measurements indicated the presence of intramolecular weak ferromagnetic coupling with J = 1.02 cm(-1) in 2.
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