O hydrogen bonds is augmented not only by a two-centre iodo.
Similar discrepancies are found for the high-pressure polymorph of phenanthrene, which is here re-investigated in greater detail. A theoretical basis for this surprising result is established. The strong hydrogen bonds link molecules in finite chains, with hydroxyl O atoms acting as both donors and acceptors of hydroxyl H atoms.
O contact formed to a carboxylate in another layer. The classification of these special twins is based on the coincidence site lattice concept. A theoretical basis for this surprising result is established. The layers are connected together by a third set of ND.
Although neutron diffraction experiments are the preferred source of this information, for a variety of reasons they are possible only for a minority of materials of interest.
The obtained fraction of monoclinic grains develop twinned structures, but there is still a lack of information about the character of grain boundaries formed in doped monoclinic solid solutions. This is achieved by modifying the relative orientations of molecules and by encouraging the formation of denser structures in which molecules pack together more efficiently.
carbonyl interaction. Despite the great diversity of CN and types of coordination polyhedra, the volume of the VD polyhedron was found to depend only on the identity of the Ln atom and its oxidation state. O hydrogen bonds, two two-centre iodo. Similar discrepancies are found for the high-pressure polymorph of phenanthrene, which is here re-investigated in greater detail.
A non-conventional mechanism of strain relaxation has been proposed, which is competitive with respect to the usual formation of misfit dislocations. This is achieved by modifying the relative orientations of molecules and by encouraging the formation of denser structures in which molecules pack together more efficiently.
A comprehensive description of the hydrogen-bonding scheme in both polymorphs is given. Its mechanism is driven by the hydrogen ordering between the partially ordered TDP-II state and the completely ordered TDP-III state.
The hydroxyl moieties are distributed along the outer edges of the ribbon and in phase I they connect the ribbons into a layer by chains of OD. carbonyl interaction.
For pseudo-centrosymmetric structures, even those very close to being centrosymmetric, it is found that it is often possible to obtain significant values of the Flack parameter.
This is achieved by modifying the relative orientations of molecules and by encouraging the formation of denser structures in which molecules pack together more efficiently. Although neutron diffraction experiments are the preferred source of this information, for a variety of reasons they are possible only for a minority of materials of interest.
Given the important disorder observed in the latter compound, only a combination of non-harmonic waves, crenel functions and TLS tensors offered a good modelling of the structure. These are fully and accurately detailed by the neutron diffraction study. O hydrogen bonds to carboxylate groups.
O hydrogen bonds formed between ammonium and carboxylate groups.
The silicide domain consists of a core region, along the bending contour, where the silicide layer has grown epitaxially with silicon. The chains are linked into a ribbon by a second set of ND. Neutron diffraction allows the full description of the H-atom positions in this molecular material, which is vital in benchmarking related crystal-structure predictions. The silicide domain consists of a core region, along the bending contour, where the silicide layer has grown epitaxially with silicon.