Methylpyrazole-capped two-dimensional supramolecular M(II) (M = Mn, Ni, Co) assemblies constructed by covalent and noncovalent interactions: Uncommon coordination modes of methylpyrazoles and magnetic properties

Hye Choi Da, Hee Yoon Jung, Hak Lim Jeong, Chan Kim Hyoung, Chang Seop Hong

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Two mononuclear complexes [Mn(5-methylpyrazole)4(N 3)2] (1) and [Ni(5-methylpyrazole)4(N 3)2] (2), as well as a novel one-dimensional coordination polymer [Co(3-methylpyrazole)2(5-methylpyrazole)2(tp)] n (3) (tp = terephthalate), were characterized. The isostructural complexes, 1 and 2, display two-dimensional supramolecular networks formed by hydrogen bonds between the N-H groups of 5-methylpyrazoles and the end N atoms of the azide ligands and additional face-to-face π-π interactions of the 5-methylpyrazoles. For 3, tp-bridged one-dimensional chains assisted by intrachain hydrogen bonds among the N-H groups of methylpyrazoles and carboxylate oxygens are connected with the help of interchain C-H⋯O hydrogen bonds, leading to a two-dimensional structure. The intra- and interchain hydrogen bonds account for the coexistence of two unique coordination forms (5-methylpyrazole and 3-methylpyrazole) of methylpyrazoles in the same coordination sphere. Weak antiferromagnetic interactions coupled with the spin-orbit coupling effect are operative in 3 through the tp ligands.

Original languageEnglish
Pages (from-to)5947-5952
Number of pages6
JournalInorganic Chemistry
Issue number15
Publication statusPublished - 2006 Jul 24


ASJC Scopus subject areas

  • Inorganic Chemistry

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