The structure in the solid state of two optically active polyamides obtained from 2,3-O-methylene-l-tartaric acid and linear α,ω-alkanediamines with 9 and 12 carbon atoms, abbreviated P9MLT and P12MLT respectively, was investigated.
The structure in the solid state of two helical nylon 3 derivatives, poly(α-n-hexyl-β-l-aspartate) and poly(α-n-octyl-β-l-aspartate), was investigated by molecular mechanics simulation methods.
This review gives an account of the observed structural diversity in relation to the role of different donors and acceptors, aqua ligand and solvents, nature of the ligands and metal ions, coordination geometry around the metal ions and counter ions besides the experimental conditions such as temperature, pH, etc. in directing the formation of supramolecular structures in the solid state.
Further investigation by differential scanning calorimetry and X-ray diffraction revealed the formation of well-ordered interdigitated structure of PTZT2T in the solid state (d1 = 20.7 Å).
Less blinkered approaches than the classic interpretation of just the molecular chemistry led us to think more about the forces which held the crystal structures together, and thus more about the impact of these on the overall structures and properties of the solid state.
The acidity of the aqueous solution and the structure of the solid-state anion were examined to confirm the presence of SiW salts.
On the other hand, a significant domain scattering due to the presence of crystalline lamellar structure was observed in the solid state (T=20°C for crystallisation time=∞).
The molecular structures of 12a,b in the solid state are reported confirming the monomeric architecture with coordination number 4 at silver, which is setup by a chelate-bonded (κ2-S,S′) S2CNR(C2H4OH) unit and two coordinated PPh3 ligands.
The elucidation of the structure of compound 3b, both in the solid state and in solution, has revealed that nN-σ*CH2-N3R+ overlap overlap confirms that an anomeric effect is present in the ammonium salt.
A DFT calculation of NBO also gives a quantitative understanding of the formation of the solid state structure by H-bonding.
The most interesting feature of the solid state structure of 1 consists in the occurrence of decanuclear water clusters made up of self-assembled cyclic hexameric water clusters with a quasi-planar conformation, unclosed trinuclear clusters and individual water molecules.
