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Structure of two polymorphs of bis-trifluoroacetylacetonato-(N,N,N′N′-tetramethylethylenediamine)magnesium

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Abstract

The structures of two polymorphs [Mg(tmeda)(tfac)2] (tmeda = N,N,N′N′-tetramethylethylenediamine, tfac = trifluoroacetylacetonate anion) are studied by single crystal XRD. The crystallographic data are as follows: for the α-modification, space group P21/c, a = 8.0874(4) Å, b = 20.2826(11) Å, c = 12.8759(7) Å, β = 90.6350(1)°, V = 2111.5(19) Å3, Z = 4, R = 0.0583; for the β-modification, space group C2/c, a = 8.8698(4) Å, b = 13.3441(8) Å, c = 18.1189(11) Å, β = 92.280(2)°, V = 2142.8(2) Å3, Z = 4, R = 0.0537. Both structures are composed of monomeric complex molecules; the magnesium coordination environment is a distorted octahedron; tfac ligands are in the trans-position. The interatomic distances and bond angles are identical in the molecules; the packing motif is the only distinction between the two polymorphs.

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Authors and Affiliations

  1. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

    E. S. Vikulova, K. V. Zherikova, D. A. Piryazev, I. V. Korol’kov, N. B. Morozova & I. K. Igumenov

  2. Novosibirsk National Research State University, Novosibirsk, Russia

    D. A. Piryazev & I. V. Korol’kov

Authors
  1. E. S. Vikulova
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  2. K. V. Zherikova
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  3. D. A. Piryazev
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  4. I. V. Korol’kov
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  5. N. B. Morozova
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  6. I. K. Igumenov
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Correspondence to E. S. Vikulova.

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Original Russian Text © 2017 E. S. Vikulova, K. V. Zherikova, D. A. Piryazev, I. V. Korol'kov, N. B. Morozova, I. K. Igumenov.

Translated from Zhurnal Strukturnoi Khimii, Vol. 58, No. 8, pp. 1731-1734, November-December, 2017.

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Vikulova, E.S., Zherikova, K.V., Piryazev, D.A. et al. Structure of two polymorphs of bis-trifluoroacetylacetonato-(N,N,N′N′-tetramethylethylenediamine)magnesium. J Struct Chem 58, 1681–1684 (2017). https://doi.org/10.1134/S0022476617080297

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  • DOI: https://doi.org/10.1134/S0022476617080297

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