PoIy[[bis[aqua(1,10-phenanthroline)-Ianthanum(III)]-μ-aqua-di-μ-5-sulfon-atoisophthalato] monohydrate] and poly[[[triaqualanthanum(III)]-μ-5-sulfonatoisophthalato] monohydrate].

In the two related polymeric title compounds, {[La2(sip)2- (phen)2(H2O)3]·H2O}n [sip is the 5-sulfonatoisophthalate trianion (C8H3O7S3- ) and phen is 1,10-phenanthroline (C12H8N2)], (I), and {[La(sip)(H2O)3]-H2O]n, (II), the lanthanum(III) ions are nine-coordinate, with similar distorted monocapped square-antiprism coordination geometry. The two crystal structures are very different. In (I), the sip anion acts as a pentadentate ligand, one of the coordinated water molecules lies on a twofold axis and further inversion, n-glide and translation operations generate a two-dimensional framework. In (II), the sip anion functions as a hexadentate ligand and a three-dimensional network with trinuclear 24- membered rings is developed via inversion, n-glide, twofold- screw and translation operations. Both structures also have extensive O—H…O hydrogen-bonded networks and π-π interactions. [ABSTRACT FROM AUTHOR]