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Syntheses, characterization, and structural analyses of several f-block isothiocyanatonitrato complexes

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Abstract

Reactions of tetra-n-butylammonium thiocyanate with lanthanide and uranyl nitrates yield complexes of the general type [(Bu)4N]x[M(NCS)y(NO3)z]. Samples of [(Bu)4N]2 [UO2(NCS)3( NO3)] (1), [(Bu)4N]3[Yb(NCS)4(NO3)2] (2), and [(Bu)4N]3[Nd(NCS)4(NO3)2rsqb; (3) were prepared from alcohol solutions. Crystallization of 1 occurs in the centrosymmetric monoclinic space group C2/c (No. 15) with a = 17.949(4) Å, b = 16.587(3) Å, c = 16.763(3) Å; β = 99.77(3)°; and Z = 4. The seven-coordinate uranium(VI) ion exhibits a pentagonal bipyramid coordination environment. Crystallization of 2 occurs in the centrosymmetric orthorhombic space group Pnnn (No. 48) with a = 12.530(2) Å, b = 12.9440(10) Å, c = 21.203(2) Å; Z = 2. The eight-coordinate ytterbium(III) ion expresses a dodecahedral coordination environment. Crystallization of 3 occurs in the noncentrosymmetric monoclinic space group Cc (No. 9) with a = 16.556(2) Å, b = 18.130(2) Å, c = 23.984(4) Å; Z = 4. The 10-coordinate neodymium(III) ion exhibits a dodecahedral coordination environment. Characterization includes physical property determinations, conoscopic studies, IR spectroscopic identifications, and UV spectral data. Details of the syntheses along with selected bond distances and angles are presented and discussed.

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Authors and Affiliations

  1. Department of Chemistry and Biochemistry, Baylor University, Waco, Texas, 76798-7348

    J. Matt Farmer & Hong S. Kwon

  2. Department of Chemistry and Biochemistry, Baylor University, Waco, Texas, 76798-7348

    Jason A. Kautz

  3. Department of Chemistry and Biochemistry, Baylor University, Waco, Texas, 76798-7348

    Donald F. Mullica

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  1. J. Matt Farmer
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  2. Jason A. Kautz
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  3. Hong S. Kwon
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  4. Donald F. Mullica
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Deceased, 30 March 1999

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Farmer, J.M., Kautz, J.A., Kwon, H.S. et al. Syntheses, characterization, and structural analyses of several f-block isothiocyanatonitrato complexes. Journal of Chemical Crystallography 30, 301–309 (2000). https://doi.org/10.1023/A:1009505106793

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