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

The mononuclear title complex, [Eu(C(24)H(34)O(4)P)(3)(CH(4)O)(5)]·CH(4)O, (1), has been obtained as a minor product in the reaction between EuCl(3)(H(2)O)(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 (P2(1)/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 κ(1) 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.