Journal of Structural Chemistry

, Volume 48, Issue 3, pp 547–551 | Cite as

Synthesis and crystal structure of a supramolecular adduct of the aqua nitrato complex of gadolinium [Gd(NO3)(H2O)7]2+ with macrocyclic cavitand cucurbit[6]uril

  • A. A. Tripol’skaya
  • E. A. Mainicheva
  • O. A. Geras’ko
  • D. Yu. Naumov
  • V. P. Fedin
Article

Abstract

A supramolecular adduct of gadolinium aqua nitrato complex and cucurbit[6]uril { [Gd(NO3)(H2O)7](C5H5N)@(C36H36N24O12)}(NO3)2·10H2O is obtained by slow diffusion of methanol into an aqueous solution containing gadolinium nitrate, pyridine, and cucurbit[6]uril. According to single crystal X-ray diffraction data, water molecules coordinated to metal atom make hydrogen bonds to polarized carbonyl groups of the macrocycle. The heptaaquanitratogadolinium(III) [Gd(NO3)(H2O)7]2+ cation is structurally characterized for the first time. Crystal system is triclinic, space group \(P\overline 1 \), a = 12.3137(4) Å, b = 14.2334(5) Å, c = 19.5629(6) Å; α = 80.850(1)°, β = 86.879(1)°, γ = 68.855(1)°; V = 3157.15(18) Å3, Z = 2. Oriented hydrogen-bonded chains of alternating cucurbit[6]uril molecules and gadolinium aqua cations form in the crystal structure.

Keywords

cucurbit[6]uril gadolinium aqua complex 

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Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  • A. A. Tripol’skaya
    • 1
  • E. A. Mainicheva
    • 1
  • O. A. Geras’ko
    • 1
  • D. Yu. Naumov
    • 1
  • V. P. Fedin
    • 1
  1. 1.A. V. Nikolaev Institute of Inorganic Chemistry, Siberian DivisionRussian Academy of SciencesNovosibirsk

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