PGSE diffusion, 1H-19F HOESY and NMR studies on several [Rh(1,5-COD)(Biphemp)]X complexes: detecting positional anion effects.
Three new salts of Rh(I), [Rh(1,5-COD)(Biphemp)]X, Biphemp = (6,6'-dimethylbiphenyl-2,2'-diyl)bis(diphenylphosphine), X = BF4-, 2a, PF6-, 2b, and CF3SO3-, 2c, were prepared and studied using PGSE diffusion, 1H-19F HOESY and inverse 103Rh (amongst other) NMR methods. Although the immediate coordination sphere of the cation does not sense the change in the anion, the PGSE diffusion and 1H-19F HOESY data suggest that, in addition to some ion pairing, each of the anions in 2 demonstrates selectivity in its approach towards the cation.
Anil Kumar
P G
PG
Laboratory of Inorganic Chemistry, ETHZ, Hönggerberg, CH-8093 Zürich, Switzerland.
Pregosin
Paul S
PS
Schmid
Thomas M
TM
Consiglio
Giambattista
G
D000838:Anions; D004058:Diffusion; D005461:Fluorine; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008958:Models, Molecular; D008968:Molecular Conformation; D010720:Phosphines / Q000032:analysis / Q000737:chemistry*; D011522:Protons; D012238:Rhodium / Q000032:analysis / Q000737:chemistry*; D013329:Structure-Activity Relationship
D000838:Anions; D010720:Phosphines; D011522:Protons; D005461:Fluorine; D012238:Rhodium