TY - JOUR
T1 - Unprecedented Stereospecific Ligand Exchange at a W ≡ W Template
AU - Dietz, Steven D.
AU - Eilerts, Nancy W.
AU - Heppert, Joseph A.
PY - 1992/1
Y1 - 1992/1
N2 - Diastereomeric binaphtholato complexes with the composition [W2(bino)2(OtBu)2] (H2bino = 1,1′‐bi‐2‐naphthol), the anti and gauche isomers 1 and 2, are formed from the reaction of [W2(OtBu)6] with rac H2bino or (R)‐H2bino respectively. Isomers 1 and 2 differ considerably in their thermodynamic stability: 1 is stable at room temperature and can be used for further diastereoselective exchange reactions, 2 decomposes in only a short time producing ter‐butanol, isobutene, and [W2{(R,R,R)‐bino}3]. The gauche arrangement of the tBuO ligands in 2 is apparently more favorable for intramolecular proton transfer. (Figure Presented.)
AB - Diastereomeric binaphtholato complexes with the composition [W2(bino)2(OtBu)2] (H2bino = 1,1′‐bi‐2‐naphthol), the anti and gauche isomers 1 and 2, are formed from the reaction of [W2(OtBu)6] with rac H2bino or (R)‐H2bino respectively. Isomers 1 and 2 differ considerably in their thermodynamic stability: 1 is stable at room temperature and can be used for further diastereoselective exchange reactions, 2 decomposes in only a short time producing ter‐butanol, isobutene, and [W2{(R,R,R)‐bino}3]. The gauche arrangement of the tBuO ligands in 2 is apparently more favorable for intramolecular proton transfer. (Figure Presented.)
UR - http://www.scopus.com/inward/record.url?scp=33751152457&partnerID=8YFLogxK
U2 - 10.1002/anie.199200661
DO - 10.1002/anie.199200661
M3 - Article
AN - SCOPUS:33751152457
VL - 31
SP - 66
EP - 68
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 1
ER -