Cocrystallising Rotamers of a Pentacoordinate Silicon Complex with a Chiral Aminodiol Ligand. Issue 9 (25th January 2013)

• Record Type: Journal Article
• Authors: Schlecht, Sebastian; Finze, Maik; Bertermann, Rüdiger; Frank, Walter; Domann, Anke; Braun, Manfred
• Is Part Of: European journal of inorganic chemistry. Issue 9(2013)
• Page Start: 1488
• Page End: 1492
• Publication Date: 2013-01-25
• Subjects: Chirality -- Crystal structure -- Density functional calculations -- Solid‐state NMR spectroscopy -- Silicon -- Stereomutation; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201201173
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract: Crystal structure analysis reveals the cocrystallysation of two turnstyle rotamers of a pentacoordinate silicon complex with a chiral backbone derived from 2‐amino‐1, 1, 2‐triphenylethanol. The structures of the two epimers are well reproduced by DFT calculations. In addition, the coexistence of two rotamers, which readily interconvert in solution, is confirmed by their solid‐state NMR spectroscopic data. Possible mechanisms of their interconversion are discussed, and preference is given to a turnstile‐like rotation of three ligands at the silicon atom about 120°. Abstract : The interconversion of turnstile rotamers at silicon, readily occurring in solution, is frozen in the solid state. Therein, the pentacoordinate complexes featuring a homochiral backbone are reported as the first examples of cocrystallising rotamers at silicon.