title: Zwitterionic and anionic multinuclear pentacoordinate silicon(IV) complexes with bridging (R,R)-tartrato(4-) ligands and SiO5 skeletons: synthesis and reactivity in aqueous solution.
abstract: Two nutrients in one molecule: A zwitterionic λ(5)Si,λ(5)Si'-disilicate (1) was synthesized and characterized. It contains ligands that exclusively derive from natural products ((R,R)-tartaric acid, choline). Hydrolysis of 1 yields 2, which shows a remarkable kinetic stability in water. Upon dissolution of 1 and 2 in water, the nutrients choline and orthosilicic acid are formed by hydrolysis.
authors.affiliation: Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany.
authors.forename: Bastian
authors.initials: B
authors.lastname: Theis
authors.forename: Jörg
authors.initials: J
authors.lastname: Weiss
authors.forename: W Peter
authors.initials: WP
authors.lastname: Lippert
authors.forename: Rüdiger
authors.initials: R
authors.lastname: Bertermann
authors.forename: Christian
authors.initials: C
authors.lastname: Burschka
authors.forename: Reinhold
authors.initials: R
authors.lastname: Tacke