Metal Carbonyl Complexes of Sapphyrins

✍ Scribed by Dr. Anthony K. Burrell; Prof. Jonathan L. Sessler; Michael J. Cyr; Ellen McGhee; Prof. James A. Ibers

• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 387 KB
• Volume: 30
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.199100911

✦ Synopsis

The constitution of 6 was established by elemental analysis, the mass spectrum," O1 the relatively high-field position of the 31P NMR signal (6 = -87.6), and the appearance of two sets of pseudoquintets for the trimethylsilyl groups in the 'H and I3C NMR spectra.["lThe expected steric crowding of the molecule in syn form with two silyl groups in "flagpole" position, as well as the resulting repulsion between the lone pairs on the phosphorus atoms, favors an anti conformation for 6. Its existence was confirmed by an X-ray structure analysis['21 (Fig. 1). :4 C 5