Spectroscopic Evidence for Intramolecular MoVI(O2)····HO−C Hydrogen Bonding in Solution

✍ Scribed by Holger Glas; Michael Spiegler; Werner R. Thiel

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 626 KB
• Volume: 1998
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/(sici)1099-0682(199802)1998:2<275::aid-ejic275>3.0.co;2-h

✦ Synopsis

The ring-opening reaction of epoxycyclohexane with 2-[3(5)-acts as a bidentate chelate, proves the formation of a weak intramolecular Mo VI (O 2 )••••HOϪC bridge in CHCl 3 solution. pyrazolyl]pyridine results in the formation of racemic trans-

This H bonding is broken by solvents such as acetone, THF or DMF, which are capable of forming hydrogen bonds to tion with lipase B from candida antarctica gives the (1S,2S) enantiomer of 1, the solid-state structure of which was deter-alcohols. Intermolecular hydrogen bonds between the OH groups and molybdenum peroxo moieties are also found in mined by X-ray crystallography, as an enantiomerically pure tridentate ligand. Investigation by NMR spectroscopy of the the solid-state structure of 2, leading to a helical arrangement of the peroxo complexes. corresponding oxodiperoxomolybdenum complex 2, where 1