Polyiodide amide complexes of transition metals: Structures and raman spectra |
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| Authors: | E V Savinkina B N Mavrin D V Al’bov V V Kravchenko M G Zaitseva |
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| Institution: | (1) Lomonosov State Academy of Fine Chemical Technology, pr. Vernadskogo 86, Moscow, 119992, Russia;(2) Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow oblast, 142092, Russia;(3) Moscow State University, Moscow, 119899, Russia |
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| Abstract: | The Raman spectra of the polyiodide complexes of d elements with urea (Ur) and acetamide (AA), namely, M(Ur)6]I3]3 (M = Cr, Fe), Co(Ur)6]I3]2 · 2Ur, Mn(Ur)6]I8], Ni(AA)6]I3]2, M(AA)6]I10 (M = Fe, Co, Cd), and Co(AA)4(H2O)2]I12], are studied. The structure of Cr(Ur)6]I3]3 is studied. The crystals of Cr(Ur)6]I3]3 are monoclinic: space group C2/c, a = 15.260(5), b = 11.941(3), c = 20.506(6) Å, β = 106.14(3)°, Z = 4, V = 3589.4(18) Å3. The I-I bond length in the CdI2 · 4BA · 2I2 polyiodide complex amorphous to X-rays is estimated by a correlation between the I-I bond length and the frequency of vibrations of this bond in the Raman spectra. |
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