Formation and structural characterization of a europium(II) mono(scorpionate) complex and a sterically crowded pyraza­bole

Acta Crystallographica Section E: Crystallographic Communications

Hilfert, L.¹  Liebing, P.³  hling, M.⁴  Kü⁵  Takats, J.⁶  Edelmann, F.T.⁷ 

[1] Chemisches Institut der Otto-von-Guericke-UniversitäDepartment of Chemistry, University of Alberta, Edmonton, Alberta, AB, Canada, T6G 2G2;ETH Zür Anorganische Chemie, Vladimir-Prelog-Weg 2, 8093 Zürich, Laboratorium fürich, Switzerland;t Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany

关键词: CRYSTAL STRUCTURE;    EUROPIUM;    PYRAZOLYLBORATE;    SCORPIONATE;    PYRAZABOLE;   

DOI  :  10.1107/S2056989017016498

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

The reaction of EuI2(THF)2 with potassium hydro­tris­(3,5-diiso­propyl­pyrazol­yl)borate (K[HB(3,5-iPr2pz)3] (= KTpiPr2, pz = pyrazol­yl) in a molar ratio of 1:1.5 resulted in extensive ligand fragmentation and formation of the europium(II) mono(scorpionate) complex bis­(3,5-diisopropyl-1H-pyrazole)[hydro­tris­(3,5-diiso­propyl­pyrazol­yl)borato]iodido­europium(II), [Eu(C27H46BN6)I(C9H16N2)2] or (TpiPr2)(3,5-iPr2pzH)2EuIII, 1, in high yield (78%). As a typical by-product, small amounts of the sterically crowded pyraza­bole derivative trans-4,8-bis­(3,5-diiso­propyl­pyrazol-1-yl)-1,3,5,7-tetra­iso­propyl­pyraza­bole, C36H62B2H8 or trans-{(3,5-iPr2pz)HB(μ-3,5-iPr2pz)}2, 2, were formed. Both title compounds have been structurally characterized through single-crystal X-ray diffraction. In 1, two isopropyl groups are each disordered over two orientations with occupancy ratios of 0.574 (10):0.426 (10) and 0.719 (16):0.281 (16). In 2, one isopropyl group is similarly disordered, occupancy ratio 0.649 (9):0.351 (9).

【 授权许可】

CC BY