STERICALLY CONGESTED LIGANDS - SYNTHESIS AND SOLUTION CONFORMATION OF BISPHOSPHITE LIGAND PRECURSORS

The synthesis and characterization of precursors to sterically hindered bisphosphite ligands containing the dibenzo[d,f][1,3,2]dioxaphosphepin and dibenzo[d,g][1,3,2]dioxaphosphocin ring system is described. The Delta G double dagger for ring inversion of the dibenzo[d,f][1,3,2]dioxaphosphepin ring...

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Bibliographic Details
Published inPhosphorus and sulfur and the related elements Vol. 90; no. 1-4; pp. 95 - 102
Main Authors PASTOR, SD, RICHARDSON, CF, NABIRAHNI, MA
Format Journal Article
LanguageEnglish
Published READING Taylor & Francis 01.05.1994
Subjects
Chemistry
Chemistry, Inorganic & Nuclear
Chemistry, Organic
Physical Sciences
Science & Technology
MONOCYCLIC PENTAOXYPHOSPHORANES
MEDIUM-SIZED HETEROCYCLES
RING SIZE
DIBENZO[D,FL[1,3,2]DIOXAPHOSPHEPIN RING
DELTA-G(NOT-EQUAL) FOR RING INVERSION
PENTACOORDINATED MOLECULES
PHOSPHORUS-COMPOUNDS
CONFORMATIONAL ANALYSIS
TRIFLUOROETHOXY GROUPS
LIGAND
DIBENZO[D,GL[1,3,2LDIOXAPHOSPHOCIN RING
OXYPHOSPHORANES
8-MEMBERED CYCLIC PHOSPHOROCHLORIDITES
P-31
HYDROFORMYLATION
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Summary:The synthesis and characterization of precursors to sterically hindered bisphosphite ligands containing the dibenzo[d,f][1,3,2]dioxaphosphepin and dibenzo[d,g][1,3,2]dioxaphosphocin ring system is described. The Delta G double dagger for ring inversion of the dibenzo[d,f][1,3,2]dioxaphosphepin ring was determined by VT P-31{H-1} NMR spectroscopy The H-1 NMR spectra of the dibenzo[d,g][1,3,2]dioxaphosphocin ligands were consistent with the eight-membered ring adopting a boat-chair conformation in solution.
ISSN:0308-664X
DOI:10.1080/10426509408016390