The crystal and molecular structure of the mew title complex has been determined by means of a single crystal X-ray diffraction method. It is triclinic with the space group P\bar1, Z=2, a=15.518(5), b=19.827(7), c=7.493(2) Å, α=100.90(3), β=103.94(2), γ=82.85(3)°. Both of the metal atoms have almost the same coordination geometry, pentagonal bipyramidal which coordinates the oxygen atoms of five water molecules (2 axial and 3 equatorial ones) and the two hydroxide ions which bridge the both metal atoms. The Sc(1)···Sc(2) distance is 3.403(2) Å. The average Sc–O(H2O) bond length is 2.194 Å, which is much longer than that of Sc–O(OH), 2.072 Å. Benzenesulfonate ions and the other water molecules do not coordinate to the metal atoms, though their oxygen atoms as well as those of the coordinated water are connected with each other by a network involving hydrogen bonding.
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