X-Ray structure analysis of methyl 2,3,4,5-Tetra-O-acetyl-α-D-galactoseptanoside

Abstract

The crystal structure of the title compound was determined by X-ray diffraction and the use of the multi-solution programs MULTAN 74. Crystals are monoclinic, space group C₂ with Z = 4 in a unit cell of dimensions: a 21.140(6), b 9.394(3), c 9.765(3) Ǻ, β 108.73(5)°. The structure was refined by full-matrix least-squares methods to a final R of 0.036 for 1858 diffractometer reflections. The seven-membered ring approximates to a twist-chair conformation very similar to that found for the gluco analogue.