Structure of the solvated yttrium(III) ion in the oxygen donor solvents dimethyl sulfoxide, N,N-dimethylformamide and N,N′-dimethylpropyleneurea and crystal structures of [Y(OSMe2)8]I3 and [Y(OCN2Me2(CH2)3)6]I3

Patric Lindqvist-Reis; Jan Näslund; Ingmar Persson; Magnus Sandström

doi:10.1039/B005119P

Structure of the solvated yttrium(III) ion in the oxygen donor solventsdimethyl sulfoxide, N,N-dimethylformamide and N,N′-dimethylpropyleneurea and crystal structures of [Y(OSMe₂)₈]I₃ and [Y(OCN₂Me₂(CH₂)₃)₆]I₃

Patric Lindqvist-Reis,^a Jan Näslund,^a Ingmar Persson^a and Magnus Sandström*^ac

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* Corresponding authors

^a Department of Chemistry, Royal Institute of Technology, Stockholm, Sweden

^b Department of Chemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden

^c Department of Structural Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm, Sweden

Abstract

The structure of the solvated yttrium(III) ion in the oxygen donor solvents dimethyl sulfoxide, N,N-dimethylformamide and N,N′-dimethylpropyleneurea, OCN₂Me₂(CH₂)₃, has been studied by means of XAFS and large angle X-ray scattering. The yttrium(III) ion co-ordinates eight solvent molecules in dimethyl sulfoxide and N,N-dimethylformamide solution with the mean Y–O bond distance 2.36(1) Å. The slightly asymmetric distribution was modelled by the cumulant expansion method for the XAFS data. The Y⋯S distance of the [Y(OSMe₂)₈]³⁺ ion in dimethyl sulfoxide solution was found to be 3.54(1) Å, corresponding to a mean Y–O–S angle of 132°. For the [Y(OCHNMe₂)₈]³⁺ ion in N,N-dimethylformamide the Y⋯C distance is 3.34(1) Å, giving a Y–O–C angle of 133°. In N,N′-dimethylpropyleneurea solution the steric effect of the bulky solvent molecules reduces the co-ordination number to six and the mean Y–O bond distance to 2.24(1) Å. The mean Y⋯C distance at 3.48(2) Å agrees with an analysis of the angular-sensitive multiple scattering contributions, which gave a Y–O–C angle of about 165°. The crystal structures of [Y(OCN₂Me₂(CH₂)₃)₆]I₃ and [Y(OSMe₂)₈]I₃, determined by X-ray diffraction at room temperature, show the ionic radii of yttrium(III) to increase about 0.12 Å from six to eight co-ordination.

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Article information

DOI: https://doi.org/10.1039/B005119P
Article type: Paper
Submitted: 06 Jan 2000
Accepted: 26 Jun 2000
First published: 26 Jul 2000

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J. Chem. Soc., Dalton Trans., 2000, 2703-2710

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Structure of the solvated yttrium(III) ion in the oxygen donor solvents dimethyl sulfoxide, N,N-dimethylformamide and N,N′-dimethylpropyleneurea and crystal structures of [Y(OSMe₂)₈]I₃ and [Y(OCN₂Me₂(CH₂)₃)₆]I₃

P. Lindqvist-Reis, J. Näslund, I. Persson and M. Sandström, J. Chem. Soc., Dalton Trans., 2000, 2703 DOI: 10.1039/B005119P

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Journal of the Chemical Society, Dalton Transactions