The conformational difference of the title compound (1) in the solid state and in solution has been investigated by X-ray crystallography and high-field proton n.m.r. spectrometry. In the solid state, compound 1 adopts the "c,(D) conformation (la), whereas 1 exists preferentially in the 'C4(D) confo
Conformation of Sterically Hindered 4-Methyl-2-oxo-2-trityl-1,3,2-dioxaphosphorinane in the Solid State and the Solution
✍ Scribed by R. Kruszynski; E. Czubacka; A. Trzesowska-Kruszynska; T. J. Bartczak; K. S. Bruzik; P. Knopik; Z. Kudzin; W. J. Stec; W. M. Wolf
- Book ID
- 106404850
- Publisher
- Springer
- Year
- 2011
- Tongue
- English
- Weight
- 492 KB
- Volume
- 41
- Category
- Article
- ISSN
- 1572-8854
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## Abstract The 220 MHz proton NMR spectra of three isomeric pairs of 2‐R‐2‐oxo‐4‐methyl‐1,3,2‐dioxaphosphorinanes, where R = methoxy (1a, b), methyl (2a, b) and dimethylamino (3a, b) (a represents the __trans__ and b the __cis__ arrangement of R and the 4‐methyl group) were analyzed by iterative c
Results of IR and 1 H, 13 C, and 31 P NMR studies of the anancomeric title compounds (2-5) and compound 1 (Scheme 1) are analyzed to search for the existence of high-energy boat or twist-boat conformations in the equatorial epimers. While the difference in frequencies (Dm) PסO between the axial an