A three-dimensional framework structure constructed from 2-(2-pyridyl-N-oxide) ethylphosphonic acid and Nd(III)

Inorganic Chemistry
Xinmin GanRobert T Paine

Abstract

A multistep synthesis for 2-(2-pyridyl-N-oxide) ethylphosphonic acid 6-H2 is described along with its spectroscopic (IR, NMR) data and a single-crystal X-ray diffraction structure analysis. Combination of the ligand with Nd(OH)3 results in the formation of a complex Nd(6-H)3. Single-crystal X-ray diffraction analysis reveals a three-dimensional crystal network generated by hydrogen-bonded chains along the crystallographic c axis. The hydrogen bonds are formed between phosphonic acid anion (6-H)(-1) protons on one chain and pyridyl N-oxide oxygen atoms in neighboring chains. The asymmetric unit contains 1/3[Nd(6-H)3] and there are two unique Nd(III) atoms, each with point symmetry. As a result, each Nd(III) ion is bound to six (6-H)(-1) ligands and the symmetry about the Nd(III) ion is octahedral with each vertex occupied by a phosphonate oxygen atom. The Nd-O bond lengths are essentially identical: Nd(1)-O(3), 2.336 (1) A; Nd(2)-O(4), 2.340 (1) A. The monoanionic ligand (6-H)(-1), therefore, serves to bridge the unique Nd(III) centers.

References

Oct 18, 2001·Journal of the American Chemical Society·O R EvansW Lin
Oct 30, 2001·Inorganic Chemistry·P AyyappanW Lin
Nov 28, 2002·Journal of the American Chemical Society·Helen L Ngo, Wenbin Lin

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Citations

Aug 10, 2006·Dalton Transactions : an International Journal of Inorganic Chemistry·Xin-Min GanRobert T Paine
Nov 9, 2017·Beilstein Journal of Organic Chemistry·Charlotte M SevrainPaul-Alain Jaffrès
Mar 28, 2008·Inorganic Chemistry·Christian R SamanamuAnne F Richards
Jun 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Nikoletta Harsági, György Keglevich
Sep 25, 2010·Inorganic Chemistry·Sylvie PaillouxRobert D Hancock

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