Phosphonic systems Part 9. Solution and solid state structure of R,R (S,S) stereoisomers of the adducts of diethyl(1-cyclohexenyl)methylphosphonate and aldehydes
作者:Kobus P. Gerber、H.Marita Roos、Tomasz A. Modro
DOI:10.1016/0022-2860(93)80121-b
日期:1993.7
The solution and solid state structures of single stereoisomers of alpha-adducts of diethyl(1-cyclohexenyl)methylphosphonate and three aldehydes were determined by NMR spectroscopy and by X-ray diffraction. In both phases, the molecules exist in virtually the same conformation, involving gauche orientation of the PO3Et2 and the 2-hydroxy groups, and trans orientation of the former group and the R group of the aldehyde molecule. In the crystal, this conformation is retained in spite of the fact that P=O ... H-O hydrogen bonding occurs inter- and not intramolecularly.