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An Ionic Nickel(II) Phosphate with Ethylenediamine: (C2H10N2)[Ni(H2O)6](HPO4)2. Hydrothermal Synthesis, Crystal Structure, and Spectroscopic Properties

✍ Scribed by J. Escobal; J.L. Pizarro; J.L. Mesa; M.I. Arriortua; T. Rojo

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 209 KB
Volume: 154
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.2000.8865

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✦ Synopsis

An ionic nickel(II) phosphate templated by ethylenediamine, (C 2 H 10 N 2 )[Ni(H 2 O) 6 ](HPO 4 ) 2 , has been prepared by hydrothermal synthesis and characterized by single-crystal di4raction data and spectroscopic techniques. The compound crystallizes in the monoclinic space group P2 1 /c with a ‫؍‬ 6.226(1), b ‫؍‬ 16.241(2), and c ‫؍‬ 14.778(2) A > , ‫؍‬ 91.28(1)3, V ‫؍‬ 1493.9(4) A > 3 , and Z ‫؍‬ 4. The structure consists of isolated Ni(H 2 O) 6 octahedra and HPO 4 tetrahedra, both of them hydrogen-bonded to ethylenediammonium cations. The compound has been characterized by IR spectroscopy, showing the bands characteristic of the (HPO 4 ) 2؊ anions and the ethylenediammonium cation. Diffuse re6ectance measurements indicate the presence of octahedrally coordinated Ni(II) ions. The D q (835 cm ؊1 ) and Racah (B ‫؍‬ 900, C ‫؍‬ 4040 cm ؊1 ) parameters have been calculated for the Ni(II) ions in octahedral sites.

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