title: From {Bi22O26} to chiral ligand-protected {Bi38O45}-based bismuth oxido clusters.
abstract: The reaction of [Bi(22)O(26)(OSiMe(2)tBu)(14)] (1) in THF with salicylic acid gave [Bi(22)O(24)(HSal)(14)] (2) first, which was converted into [Bi(38)O(45)(HSal)(22)(OH)(2)(DMSO)(16.5)]·DMSO·H(2)O (3·DMSO·H(2)O) after dissolution and crystallization from DMSO. Single-crystal X-ray diffraction analysis and ESI mass spectrometry associated with infrared multi-photon dissociation (IRMPD) tandem MS experiments confirm the formation of the large and quite stable bismuth oxido cluster 3. The reaction of compound 2 with the butoxycarbonyl(BOC)-protected amino acids phenylalanine and valine (BOC-PheOH and BOC-ValOH), respectively, resulted in the formation of chiral [Bi(38)O(45)(BOC-AA)(22)(OH)(2)] (AA=deprotonated amino acid), as shown by a combination of different analytical techniques such as elemental analysis, dynamic light scattering, circular dichroism spectroscopy, and ESI mass spectrometry.
authors: Technische Universität Chemnitz, Strasse der Nationen 62, 09111 Chemnitz, Germany.
authors: Dirk
authors: D
authors: Mansfeld
authors: Linda
authors: L
authors: Miersch
authors: Tobias
authors: T
authors: Rüffer
authors: Dieter
authors: D
authors: Schaarschmidt
authors: Heinrich
authors: H
authors: Lang
authors: Tony
authors: T
authors: Böhle
authors: Ralf W
authors: RW
authors: Troff
authors: Christoph A
authors: CA
authors: Schalley
authors: Jens
authors: J
authors: Müller
authors: Michael
authors: M
authors: Mehring
mesh_terms: D000596:Amino Acids / Q000737:chemistry*; D001729:Bismuth / Q000737:chemistry*; D008024:Ligands; D013058:Mass Spectrometry; D015394:Molecular Structure; D020156:Salicylic Acid / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000596:Amino Acids; D008024:Ligands; C033301:bismuth oxide; D020156:Salicylic Acid; D001729:Bismuth