Two Modifications of Y 2 Piv 6 (Hpiv) 6 crystals: Synthesis and structures
作者： E. A. Kiseleva , S. I. Troyanov , Yu. M. Korenev
DOI: 10.1134/S1070328406010106
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摘要: Crystals of two modifications 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) A, b 11.948(4) c 20.352(3) β 108.73(3)°, Z 4, space group P21/n, R 1 0.105. β-modifications also monoclinic, 21.617(4) 36.559(4) 29.930(4) 104.40(2)°, 12, P21/c, 0.050. molecular structures crystals α-and consist Y2(μ2-Piv)4(Piv)2(HPiv)6 dimers. Y atoms with distorted antiprismatic coordination surrounding O (Y-O 2.23–2.53 A) linked four bridging bidentate anions form structural fragment shaped into lantern. Monodentate Hpiv molecules participate formation intramolecular hydrogen bonds Piv ligands. Crystal differ packing Y2Piv6(HPiv)6 dimers centrosymmetric nature structure α-modification.
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