Neutron and X-ray diffraction, inelastic neutron scattering, and solid-state (super 13)C NMR investigations of polymorphic p-chlorophenylformamide: absence of proton transfer along the intermolecular N-H-O hydrogen bond

Neutron and X-ray crystal structures of p-chlorophenylformamide (ClC6H4NHCHO, 1) are determined after recrystallization from methanol and acetone solvents. All structures reveal that the formamide group is essentially coplanar with the chlorophenyl ring.