Impact of Na- and K-C pi-interactions on the structure and binding of M3(sol)n(BINOLate)3Ln catalysts.
Shibasaki's heterobimetallic complexes M3(THF)n(BINOLate)3Ln [M = Li, Na, K; Ln = lanthanide(III)] are among the most successful asymmetric Lewis acid catalysts. Why does M3(THF)n(BINOLate)3Ln readily bind substrates when M = Li but not when M = Na or K? Structural studies herein indicate Na- and K-C cation-pi interactions and alkali metal radius may be more important than even lanthanide radius. Also reported is a novel polymeric [K3(THF)2(BINOLate)3Yb]n structure that provides the first evidence of interactions between M3(THF)n(BINOLate)3Ln complexes.
Wooten
Alfred J
AJ
P. Roy and Diana T. Vagelos Laboratories, University of Pennsylvania, Department of Chemistry, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, USA.
Carroll
Patrick J
PJ
Walsh
Patrick J
PJ
D001665:Binding Sites; D002384:Catalysis; D004583:Electrons; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008094:Lithium; D008672:Metals, Alkali / Q000138:chemical synthesis*; D015394:Molecular Structure; D009284:Naphthols / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis*; D011188:Potassium; D012964:Sodium; D013763:Tetrahydrofolates / Q000737:chemistry*
C406944:BINOL, naphthol; D028581:Lanthanoid Series Elements; D008672:Metals, Alkali; D009284:Naphthols; D009942:Organometallic Compounds; D013763:Tetrahydrofolates; C030371:5,6,7,8-tetrahydrofolic acid; D008094:Lithium; D012964:Sodium; D011188:Potassium