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Sandwich transitional metal complexes with tungstobismuthates and 1-methylimidazole ligands: Syntheses, structures and magnetic properties

✍ Scribed by Hong Liu; Lin Xu; Guanggang Gao; Fengyan Li; Ning Jiang

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
658 KB
Volume
878
Category
Article
ISSN
0022-2860

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✦ Synopsis

Two novel sandwich-type coordination compounds of tungstobismuthate Na 9 [{Na(

(2) (mim = 1-methylimidazole) have been synthesized in alkaline aqueous solution. Their composition and structures were established by elemental analyses, IR spectra, and single crystal X-ray diffraction. These two complexes consist of two tri-vacant [a-B-Bi III W VI 9 O 33 ] 9À moieties linked through three Cu II or Mn II and three Na + ions. These Na + cations around the complex anion were bonded with some terminal and bridging oxo atoms from the complex anion and water molecules. In addition to tungstobismuthate ligands, 1-methylimidazoles also coordinate to sandwich transitional metal ions. Magnetic measurement indicates the existence of antiferromagnetic interaction between the trimeric transitional metal ions for 1 and 2.

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✍ Wei-Xiong Zhang; Yang-Yi Yang; Shao-Bo Zai; Seik Weng Ng; Xiao-Ming Chen 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 235 KB 👁 1 views

## Abstract Three discrete dinuclear copper(II)–lanthanide(III) complexes, namely, [CuLn(mmi)~2~(NO~3~)~3~(H~2~O)~2~] [Ln = La (1), Sm (2)] and [CuGd(mmi)~2~(NO~3~)~2~(H~2~O)~3~][NO~3~] (3) (Hmmi = 2‐hydroxymethyl‐1‐methylimidazole) were synthesized and structurally characterized by X‐ray diffracti