The Crystal and Molecular Structure of Vitamin B6 Derivatives. I. Pyridoxal Phosphate Hydrate and Pyridoxal Phosphate Methyl Hemiacetal

摘要: Pyridoxal phosphate hydrate (PLPHYD) was crystallized from an aqueous solution in the form of monoclinic needles; space group P21⁄c with a=10.503, b=13.608, c=7.488 A, β=93.71° and four molecules unit cell. Prism-shaped crystal pyridoxal methyl hemiacetal (PLPMHA) obtained by dissolving crystals into 90% methanol; P\barl, cell dimensions, a=9.42, b=10.61, c=6.20 α=105.6°, β=95.7°, γ=99.7°, two per Intensity data were collected on automated diffractometer for PLPHYD photographically PLPMHA. Crystal structures have been determined symbolic addition method. Refinements done block-diagonal least-squares procedures, final R value being 0.093 0.112 The free aldehyde interacts water molecule to gem-diol crystalline state methanol hemiacetal. One o...