X‐ray diffraction of oriented amylose fibers. III. The structure of amylose–n‐butanol complexes

Complexes of amylose with n‐butanol were prepared both as crystalline precipitates and as oriented fibers. These complexes were subjected to x‐ray analysis, their unit cells were calculated, and the space group of P212121 was confirmed. n‐Butanol complexes exist in both hydrated and anhydrous forms. There is no evidence for methanol, ethanol, or n‐propanol structures similar to those shown by the n‐butanol complex. The Complexes are unstable in the open air and revert to V‐amylose hydrate on standing.