title: Neutron scattering study of the H-bond network in amorphous N-methylformamide.
abstract: Original investigations of structural properties in noncrystalline solid N-methylformamide (HCONHCH(3)) are presented in this paper. After description of the sample preparation, the elastic neutron scattering formalism is applied to deduce the coherent scattering cross section for amorphous N-methylformamide. The contribution of each possible monomer (cis or trans) is computed and the corresponding distinct structure factor is deduced. Our measurements clearly show that the hydrogen-bond network occurs in amorphous N-methylformamide between C=O and N-H groups. The experimental spectra are consistent with an open-chain structure similar to the one existing in the crystalline form. The more probable clusters that have been identified in the liquid are also examined.
authors.affiliation: Laboratoire Physico-Chimie des Matériaux, Département de Physique, Faculté des Sciences de Monastir, Monastir 5019, Tunisia.
authors.forename: Férid
authors.initials: F
authors.lastname: Hammami
authors.forename: Salah
authors.initials: S
authors.lastname: Nasr
authors.forename: Marie-Claire
authors.initials: MC
authors.lastname: Bellissent-Funel