Crystal and molecular structure of cobalt(II)mercury(II) thiocyanate adducts having a new layer structure.

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概要

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• <I>N</I>-Methyl-2-piperidone adduct and dimethyl sulfoxide adduct of cobalt(II)mercury(II) thiocyanate were synthesized and their crystal and molecular structures were determined by the single-crystal X-ray diffraction technique. The former adduct is triclinic with a space group <I>P</I>\bar1, <I>a</I>=8.488(3), <I>b</I>=17.206(7), <I>c</I>=8.466(3) Å, α=103.72(1)°, β=90.00(1)°, γ=100.85(1)°, <I>Z</I>=2, while the latter adduct is orthorhombic with a space group <I>P</I>2<SUB>1</SUB>2<SUB>1</SUB>2<SUB>1</SUB>, <I>a</I>=8.418(3), <I>b</I>=27.389(10), <I>c</I>=8.407(3) Å, <I>Z</I>=4, and the final <I>R</I> values obtained were 0.059 and 0.066, respectively. In these adducts each mercury atom is in the tetrahedral geometry, coordinated with four sulfur atoms of the thiocyanate (SCN) ions, and each cobalt atom is in the octahedral geometry, coordinated with four nitrogen atoms of SCN ions and two oxygen atoms of the Lewis-base molecules which occupy the trans-positions. Each pair of different kinds of metal atoms are bridged by an SCN ion forming a 16-membered ring of Co<SUB>2</SUB>Hg<SUB>2</SUB>(SCN)<SUB>4</SUB>; these are linked, forming a two-dimensional network. The Lewis-base ligands are extended perpendicular to the plane on both sides. The complex layers are piled up in parallel, and there are no chemical or hydrogen bondings between the layers. This is a new type of the structure for CoHg(SCN)<SUB>4</SUB>L<SUB>2</SUB> (L=Lewis base) type adducts.

• 公益社団法人 日本化学会の論文

著者

• Ouchi Akira

  Department of Chemistry, College of Arts and Sciences, The University of Tokyo

• Kinoshita Hisashi

  Department of Chemistry, Faculty of Liberal Arts, Shizuoka University

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