The Crystal and Molecular Structure of Diaquadihydroxotetrakis(<i>m</i>-nitrobenzenesulfonato)discandium(III) in a Linear Polymeric Form, [Sc2(OH)2(O2NC6H4SO3)4(H2O)2]<i>n</i>

Abstract

Abstract The crystal and molecular structures of the title complex has been determined by the single-crystal X-ray diffraction method. It is monoclinic, with the space group Pn, Z=2 (including 4 metal atoms), a=28.90(2), b=10.251(4), c=5.981(1) Å, and β=94.68(3)°. Both of the metal atoms, Sc(1) and Sc(2), have the hexa-coordinated octahedral geometry, being coordinated to four sulfonato oxygen atoms as well as to two water oxygen (Sc(1)) or to two hydroxide oxygen atoms (Sc(2)). Any pair of the neighboring metal atoms along the b-axis are bridged by two sulfonato ions, forming an infinite chain structure; however, the Sc(2)–O bond lengths (2.307(10)–2.556(19) Å; average, Sc(2)–O (sulfonate), 2.422; Sc(2)–O(OH−), 2.394 Å) are much longer than the Sc(1)–O lengths (2.031(7)–2.150(8) Å; average, Sc(1)–O(sulfonate), 2.055; Sc(1)–O(H2O), 2.122 Å).