Premium
New C 2 ‐Chiral Bidentate Ligands Bridging the gap between donor phosphine and acceptor carbonyl ligands
Author(s) -
Peter Kündig E.,
Dupré Chantal,
Bourdin Bernadette,
Cunningham Allan,
Pons Dominique
Publication year - 1994
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19940770202
Subject(s) - chemistry , denticity , cyclopentane , phosphine , stereochemistry , alkyl , medicinal chemistry , crystallography , crystal structure , organic chemistry , catalysis
Two new C 2 chiral bidentate phosphorous ligands have been prepared in enantiomerically pure form. The two phosphorous centers bear electron‐withdrawing groups ((CF 3 ) 2 CHO, C 6 F 5 ) and are linked by a trans ‐cyclopentane‐1,2‐diol‐derived bridge. Photolysis of [Cr(η 6 ‐C 6 H 6 )(CO) 3 ] in the presence of these two new ligands and of two previously reported bidentate phosphites, and fluorophosphinites (L) afforded [Cr(η 6 ‐C 6 H 6 )(CO)L] complexes. IR Spectral comparison of the complexes shows the new ligands to be intermediate in their bonding properties between alkyl phosphites and CO.