PGSE diffusion, 1H–19F HOESY and NMR studies on several [Rh(1,5-COD)(Biphemp)]X complexes: detecting positional anion effects

✍ Scribed by P. G. Anil Kumar; Paul S. Pregosin; Thomas M. Schmid; Giambattista Consiglio

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 160 KB
• Volume: 42
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1406

✦ Synopsis

Abstract

Three new salts of Rh(I), [Rh(1,5‐COD)(Biphemp)]X, Biphemp = (6,6′‐dimethylbiphenyl‐2,2′‐diyl)bis(diphenylphosphine), X = BF~4~^−^, 2a, PF~6~^−^, 2b, and CF~3~SO~3~^−^, 2c, were prepared and studied using PGSE diffusion, ^1^H–^19^F HOESY and inverse ^103^Rh (amongst other) NMR methods. Although the immediate coordination sphere of the cation does not sense the change in the anion, the PGSE diffusion and ^1^H–^19^F HOESY data suggest that, in addition to some ion pairing, each of the anions in 2 demonstrates selectivity in its approach towards the cation. Copyright © 2004 John Wiley & Sons, Ltd.