TY - RPRT TI - Spirocyclic zwitterionic lambda5Si-silicates with two bidentate ligands derived from alpha-amino acids or alpha-hydroxycarboxylic acids: synthesis, structure, and stereodynamics. AU - Reinhold Tacke AU - RĂ¼diger Bertermann AU - Christian Burschka AU - Simona Dragota AU - Martin Penka AU - Ingo Richter PY - 2004 DO - 10.1021/ja047248z UR - https://pubmed.ncbi.nlm.nih.gov/15521770/ ID - 15521770 ER -