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Crystal structure of tris-[bis-(2,6-diiso-propyl-phen-yl) phosphato-κO]penta-kis-(methanol-κO)europium methanol monosolvate.

ABSTRACT: The mononuclear title complex, [Eu(C₂₄H₃₄O₄P)₃(CH₄O)₅]·CH₄O, (1), has been obtained as a minor product in the reaction between EuCl₃(H₂O)₆ and lithium bis-(2,6-diiso-propyl-phen-yl) phosphate in a 1:3 molar ratio in a methanol medium. Its structure exhibits monoclinic (P2₁/c) symmetry at 120 K and is isostructural with the La, Ce and Nd analogs reported previously [Minyaev et al. (2018a ▸). Acta Cryst. C74, 590-598]. In (1), all three bis-(2,6-diiso-propyl-phen-yl) phosphate ligands display the terminal κ¹ O-coordination mode. All of the hy-droxy H atoms are involved in O-H⋯O hydrogen bonding, exhibiting four intra-molecular and two inter-molecular hydrogen bonds. Photophysical studies have demonstrated luminescence of (1) with a low quantum yield.

SUBMITTER: Kalugin AE

PROVIDER: S-EPMC6895930 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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Crystal structure of tris-[bis-(2,6-diiso-propyl-phen-yl) phosphato-κO]penta-kis-(methanol-κO)europium methanol monosolvate.

Kalugin Alexey E AE Lyssenko Konstantin A KA Minyaev Mikhail E ME Roitershtein Dmitrii M DM Puntus Lada N LN Varaksina Evgenia A EA Nifant'ev Ilya E IE

Acta crystallographica. Section E, Crystallographic communications 20191119 Pt 12

The mononuclear title complex, [Eu(C24H34O4P)3(CH4O)5]·CH4O, (1), has been obtained as a minor product in the reaction between EuCl3(H2O)6 and lithium bis-(2,6-diiso-propyl-phen-yl) phosphate in a 1:3 molar ratio in a methanol medium. Its structure exhibits monoclinic (P21/c) symmetry at 120 K and is isostructural with the La, Ce and Nd analogs reported pr ...[more]

PMID: 31871753

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Project description:The title compounds, [FeCl2(C15H20N2)4], (I), [FeBr2(C15H20N2)4], (II), and [FeBr2(C15H20N2)4]·2C4H10O, (IIb), respectively, all have triclinic symmetry, with (I) and (II) being isotypic. The Fe(II) atoms in each of the structures are located on an inversion center. They have octa-hedral FeX 2N4 (X = Cl and Br, respectively) coordination spheres with the Fe(II) atom coordinated by two halide ions in a trans arrangement and by the tertiary N atom of four aryl-imidazole ligands [1-(2,6-diiso-propyl-phen-yl)-1H-imidazole] in the equatorial plane. In the two independent ligands, the benzene and imidazole rings are almost normal to one another, with dihedral angles of 88.19 (15) and 79.26 (14)° in (I), 87.0 (3) and 79.2 (3)° in (II), and 84.71 (11) and 80.58 (13)° in (IIb). The imidazole rings of the two independent ligand mol-ecules are inclined to one another by 70.04 (15), 69.3 (3) and 61.55 (12)° in (I), (II) and (IIb), respectively, while the benzene rings are inclined to one another by 82.83 (13), 83.0 (2) and 88.16 (12)°, respectively. The various dihedral angles involving (IIb) differ slightly from those in (I) and (II), probably due to the close proximity of the diethyl ether solvent mol-ecule. There are a number of C-H⋯halide hydrogen bonds in each mol-ecule involving the CH groups of the imidazole units. In the structures of compounds (I) and (II), mol-ecules are linked via pairs of C-H⋯halogen hydrogen bonds, forming chains along the a axis that enclose R 2 (2)(12) ring motifs. The chains are linked by C-H⋯π inter-actions, forming sheets parallel to (001). In the structure of compound (IIb), mol-ecules are linked via pairs of C-H⋯halogen hydrogen bonds, forming chains along the b axis, and the diethyl ether solvent mol-ecules are attached to the chains via C-H⋯O hydrogen bonds. The chains are linked by C-H⋯π inter-actions, forming sheets parallel to (001). In (I) and (II), the methyl groups of an isopropyl group are disordered over two positions [occupancy ratio = 0.727 (13):0.273 (13) and 0.5:0.5, respectively]. In (IIb), one of the ethyl groups of the diethyl ether solvent mol-ecule is disordered over two positions (occupancy ratio = 0.5:0.5).

Dataset Information

Crystal structure of tris-[bis-(2,6-diiso-propyl-phen-yl) phosphato-κO]penta-kis-(methanol-κO)europium methanol monosolvate.

Publications

Crystal structure of tris-[bis-(2,6-diiso-propyl-phen-yl) phosphato-κ<i>O</i>]penta-kis-(methanol-κ<i>O</i>)europium methanol monosolvate.

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