title: 3,3'-Selenobis(propionic acid).
abstract: In contrast to Se[CH(2)C(O)OH](2) versus S[CH(2)C(O)OH](2), the title compound, Se[CH(2)CH(2)C(O)OH](2) or C(6)H(10)O(4)Se, is structurally quite similar to its sulfur analogue. The molecule has twofold symmetry. The C-Se-C bond angle is 96.48 (8) degrees and the Se-C bond lengths are 1.9610 (14) A. The shortest Se.O intermolecular distance is 3.5410 (11) A. The O.O distances in the carboxylic acid dimers are 2.684 (2) A. The temperature dependence of the IR spectrum suggests tautomerism in the solid state.
authors: Department of Chemistry, University of Bergen, Allégaten 41, 5007 Bergen, Norway.
authors: K I
authors: KI
authors: Doudin
authors: J
authors: J
authors: Songstad
authors: K W
authors: KW
authors: Törnroos