β Scribed by Anna Bernardi; Maria Grazia Beretta; Vincenzo Malatesta; Camillo Tosi
No coin nor oath required. For personal study only.
A combined experimental ('H NMR) and theoretical (molecular mechanics and PCILO) study of (4S,SS,6R)-4-carboma thoxyethylenyl-N-carbobenzyloxy-5-methyl-6-phenyl oxazolidine has been carried out with the purpose of contributing to a better understanding of the steric and electronic factors responsible for the observed diastereoisomeric selectivity in the dihydroxylation of oxazolidines leading to optically active a, j3 dialkoxyaldehydes.
π SIMILAR VOLUMES
The conformation of diribosylribitol phosphate was studied by means of NMR spectroscopy and molecular dynamics (MD). Starting from 3 J( 1 H, 1 H), 3 J( 31 P, 1 H) and 3 J( 31 P, 13 C) couplings, measured from 1 H NMR, 13 C NMR and COSY spectra, the conformations of the ribose residues and the phosph
The 1,5-cyclooctadiene COD molecule can easily form complexes with transition metals with the molecular structure of various of these complexes being proposed with the aid of X-ray diffraction methods. The fact that the complexes exhibit weak metalαCOD bonds makes it very important in inorganic synt
Models of the trisaccharide, 1-kestose [beta-D-fructofuranosyl-(2----1)-beta-D-fructofuranosyl-(2 in equilibrium with 1)-alpha-D -glucopyranoside], were analyzed with the molecular mechanics computer program MM2(87) to ascertain their inter-ring torsion angles, primary alcohol side-group orientation
Cycloartenol(4), a natural plant sterol, was shown to be an effective membrane reinforcer; this was attributed to its conformation. We now present a conformational analysis of 4 by molecular modeling and NMR. Molecular modeling suggests that two conformations I and I1 coexist, differing mainly at th
C NMR spectra of six flavones from Gomphrena martiana were analysed and compared with those of two related flavones isolated from Popowiu caulipora. This series of compounds has a similar substitution pattern on ring A, all compounds having oxygenated substituents on C-5, C-6 and C-7. Consistent tre