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The title compound, (C21H33N2O)2[SmCl5(C4H8O)]·C7H8·C4H8O, has a layered structure in which each distorted octa­hedral [SmCl5(THF)]2− unit (THF is tetra­hydro­furan) is capped by two cations. The central metal SmIII atom of the [SmCl5(THF)]2− anionic unit is coordinated by five Cl atoms and one THF O atom, forming a distorted octa­hedral geometry. The crystal structure displays C—H...Cl and O—H...Cl hydrogen bonding. The structure exhibits disorder of the solvent.

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In the title compound, C14H9BrN2, the benzene and quinoxaline rings are almost coplanar [r.m.s. deviation = 0.0285 (3) Å and dihedral angle = 2.1 (2)°].
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