The crystal structure of an unstable polymorph of β-d-allose
CrystEngComm2004Vol. 6(86), pp. 535–539
Citations Over Time
Abstract
The crystal structure of a new polymorph, Form II, of β-D-allose has been determined by X-ray powder diffraction. The unit cell is hexagonal, a = b = 16.598 Å, c = 4.856 Å, α = β = 90°, γ = 120°, space group P62 with Z = 6, Z′ = 1. The molecule adopts the 4C1 chair-conformation, with a torsional change of conformation of the O6 side-chain compared to the orthorhombic Form I. The two polymorphs share a common feature of a stacked hydrogen bonded column of molecules in the short axis direction. The structures differ in hydrogen linking of these columns. The more stable Form I has more immediate neighbours linked by hydrogen bonds to a reference molecule, and higher crystal density than Form II.
Related Papers
- → On the uranates of ammonium—II(1963)94 cited
- → 4-(p-Methylthio)phenyl-2,6-diphenyl phosphinine: The first X-ray crystal structure of a λ3-triaryl-phosphabenzene(2006)27 cited
- → Solid-solid synthesis and structural phase transition process of SmF 3(2018)8 cited
- → Crystal Structure of a Chalcone Derivative(2001)1 cited
- → Crystal and molecular structure of 6-0-acetylgrayanotoxin III(1996)