ISSN:
1572-8854
Schlagwort(e):
Bis(dibenzo[d,f][1,3,2]dioxaphosphepin) ligands
;
platinum
;
hydroformylation
;
enantioselective catalysis
;
diastereomers
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Geologie und Paläontologie
,
Physik
Notizen:
Abstract Bis(dibenzo[d,f][1,3,2]dixoaphosphepin) ligands are extensively used in catalysts for asymmetric alkene hydroformylation; however, few crystal structures of complexes of these ligands have been reported. In this paper, the synthesis and X-ray crystal structure of cis-{(±)-6,6′-[[1,1′-biphenyl]-2,2′-diylbis(oxy)]bis-dibenzo[d,f][1,3,2]dioxaphosphepin} diiodoplatinum (II)·dichloromethane are presented. This complex crystallizes in the triclinic space group P1¯ with a = 12.0842(2,3) b = 12.6993(15) c = 13.2801(18) Å; α = 85.852(10), β = 76.723(13), γ = 72.400(12)°, V = 1890.7(10) Å3 and Z = 4. The diastereomer that has crystallized has an R*R*R*(S*S*S*) configuration. This X-ray crystal structure supports previous observations that bis(phosphite) ligands with bridging groups derived from 2,2′-biphenol can exhibit a wide range of bite angles (〉20°).
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1009579516577
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