H-bonding in liquid acetamide as studied by x-ray scattering

A structural investigation of liquid acetamide was performed at 346 K using x-ray scattering. The data are analyzed to yield the molecular structure f actor and the distinct pair correlation function. Two H-bonds per molecule are found on average. The mean N ... O distance is about 3.03 Angstrom. The liquid structure can be described by some structural units similar to the ones existing either in the rhombohedral or in the orthorhombic crystalline form. (C) 1999 American Institute of Physics. [S0021-9606(99)50718-6].