Syntheses, and crystal and molecular structures of [enneakis(chloroacetato)-tetrakis(dimethyl sulfoxide)trineodymium(III)], [Nd3(ClCH2CO2)9{(CH3)2SO}4], and of the isomorphous lanthanum(III) and praseodymium(III) salts.

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概要

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• The crystal and molecular structures of the chloroacetato–dimethyl sulfoxide (dmso) mixed complex of neodymium(III) indicated in the title were determined by the single-crystal X-ray diffraction method. The crystal is monoclinic, space group <I>P</I>2<SUB>1</SUB>⁄<I>n</I>, <I>a</I>=21.106(21), <I>b</I>=15.871(8), <I>c</I>=15.748(7) Å, β=93.29(5)°, <I>Z</I>=4 (including 12 metal atoms in a unit cell). There are three kinds of crystallographically independent metal atoms, Nd(1), Nd(2), and Nd(3): Nd(1) and Nd(3) are ennea-coordinated (approximately tricapped trigonalprism geometry), and Nd(2) is deca-coordinated (approximately bicapped square-antiprism geometry) including a slightly long M–O bonding. All dmso molecules are directly coordinated to the metal atoms as unidentate, while all the carboxylate ions bridge metal atoms acting as bidentate or tridentate ligands. The bridging atoms are arranged in a chain which is approximately formed along the [101] axis. Also, the isomorphous lanthanum(III) and praseodymium(III) complexes were obtained and their structures were elucidated.

• 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

• Sugita Yoshihiko

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

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