โ Scribed by Huijie Wan; Agnes M. Modro; Tom A. Modro; Susan Bourne; Luigi R. Nassimbeni
No coin nor oath required. For personal study only.
The x-ray molecular structures of five chiral phosphoramidates derived from N-phosphorylated nitrogen mustard were determined and the molecular parameters are discussed. The value of the torsion angle of the O=P-N-H function which determines the packing of the molecules was found to determine also the ability of a substrate to form diastereomeric hydrogen-bonded complexes with optically active acids.
Ph
๐ SIMILAR VOLUMES
An nmr spectral comparison of a model cyclic pentapeptide cyclo(G1y-Pro-Gly-D-Phe-Pro) with an analogous pseudopeptide has been made. The pseudopeptide contains a $[CH2S] amide bond replacement a t the only amide linkage that, in the model, is not involved in an intramolecular hydrogen bond. Both pr
The vibrational spectra of tris(hydroxymethyl)aminomethane (THAM) were observed at various temperatures and the polarized Raman spectra at room temperature. The three types of O-H stretch indicate that the structure of THAM consists of a chain rather than a layer structure. Some structures found in