Two Modifications of Y2Piv6(Hpiv)6 crystals: Synthesis and structures

Two Modifications of Y2Piv6(Hpiv)6 crystals: Synthesis and structures Crystals of two modifications of yttrium pivalate solvate Y2Piv6(HPiv )6(HPiv = (CH3)3CCOOH) are synthesized and studied by single-crystal X-ray diffraction analysis. The 3α-modification crystallizes in the monoclinic system, a = 16.394(2) Å, b = 11.948(4) Å, c = 20.352(3) Å, β = 108.73(3)°, Z = 4, space group P21/n, R 1 = 0.105. Crystals of the β-modifications are also monoclinic, a = 21.617(4) Å, b = 36.559(4) Å, c = 29.930(4) Å, β = 104.40(2)°, Z = 12, space group P21/c, R 1 = 0.050. The molecular structures of crystals of the α-and β-modifications consist of the Y2(μ2-Piv)4(Piv)2(HPiv)6 dimers. The Y atoms with a distorted antiprismatic coordination surrounding of the O atoms (Y-O 2.23–2.53 Å) are linked by four bridging bidentate pivalate anions and form the structural fragment shaped into a distorted lantern. Monodentate Hpiv molecules participate in the formation of intramolecular hydrogen bonds with Piv ligands. Crystal structures of the α-and β-modifications differ in packing of the Y2Piv6(HPiv)6 dimers and in centrosymmetric nature of the dimers in the structure of the α-modification. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Coordination Chemistry Springer Journals

Two Modifications of Y2Piv6(Hpiv)6 crystals: Synthesis and structures

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Publisher
Nauka/Interperiodica
Copyright
Copyright © 2006 by Pleiades Publishing, Inc.
Subject
Chemistry; Inorganic Chemistry; Physical Chemistry
ISSN
1070-3284
eISSN
1608-3318
D.O.I.
10.1134/S1070328406010106
Publisher site
See Article on Publisher Site

Abstract

Crystals of two modifications of yttrium pivalate solvate Y2Piv6(HPiv )6(HPiv = (CH3)3CCOOH) are synthesized and studied by single-crystal X-ray diffraction analysis. The 3α-modification crystallizes in the monoclinic system, a = 16.394(2) Å, b = 11.948(4) Å, c = 20.352(3) Å, β = 108.73(3)°, Z = 4, space group P21/n, R 1 = 0.105. Crystals of the β-modifications are also monoclinic, a = 21.617(4) Å, b = 36.559(4) Å, c = 29.930(4) Å, β = 104.40(2)°, Z = 12, space group P21/c, R 1 = 0.050. The molecular structures of crystals of the α-and β-modifications consist of the Y2(μ2-Piv)4(Piv)2(HPiv)6 dimers. The Y atoms with a distorted antiprismatic coordination surrounding of the O atoms (Y-O 2.23–2.53 Å) are linked by four bridging bidentate pivalate anions and form the structural fragment shaped into a distorted lantern. Monodentate Hpiv molecules participate in the formation of intramolecular hydrogen bonds with Piv ligands. Crystal structures of the α-and β-modifications differ in packing of the Y2Piv6(HPiv)6 dimers and in centrosymmetric nature of the dimers in the structure of the α-modification.

Journal

Russian Journal of Coordination ChemistrySpringer Journals

Published: Feb 13, 2006

References

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