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1 H, 19 F, and 31 P PGSE NMR Diffusion Studies on Chiral Organic Salts: Ion Pairing and the Dependence of a Diffusion Value on Diastereomeric Structure
Author(s) -
MartínezViviente Eloísa,
Pregosin Paul S.,
Vial Laurent,
Herse Christelle,
Lacour Jérôme
Publication year - 2004
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200305719
Subject(s) - diastereomer , chemistry , diffusion , hexacoordinate , pulsed field gradient , ion , phosphate , solvent , inorganic chemistry , organic chemistry , molecule , thermodynamics , physics , silicon
1 H, 19 F and 31 P pulsed field gradient spin‐echo (PGSE) diffusion studies on chiral organic salts that contain hexacoordinate phosphate anions, namely tris(tetrachlorobenzenediolato)phosphate( V ) (TRISPHAT) and bis(tetrachlorobenzenediolato)mono([1,1′]binaphthalenyl‐2,2′diolato)‐phosphate( V ) (BINPHAT), are reported. The first example of the dependence of a diffusion value on diastereomeric structure is presented. Marked solvent and concentration effects on the diffusion constants ( D ) of these salts are noted and the question of ion pairing is discussed.