Two novel olefin-copper(I) coordination polymers with DHDAB as building blocks

Crystal structure and enantiomeric layer disorder of a copper(I) nitrate π-coordination compound

The novel π-coordination compound [CuI(m-dmphast)NO3], where m-dmphast = 5-(allylthio)-1-(3,5-dimethylphenyl)-1H-tetrazole, is characterized using single-crystal X-ray diffraction and crystallizes in a noncentrosymmetric space group. Additionally, for the first time in this group of materials, the streaks of X-ray diffuse scattering in the reciprocal space sections were observed and described. This gave the possibility for a deeper insight into the local structure of the title compound. The conjecture about the origin of diffuse scattering was derived from average structure solution. It was then confirmed using the local structure modelling. The extended [Cu(m-dmphast)NO3]∞ chains, connected by weak interactions, produce layers which can exist in two enantiomeric forms, one of which predominates.

The crystal structure of dichlorido-μ2-dichlorido-(η2-1,4-bis(4-vinylbenzyl)-1,4-diazabicyclo[2.2.2]octane-1,4-diium)dicopper(I), C24H30N2Cu2Cl4

C24H30N2Cu2Cl4, triclinic, P1̄ (no. 2), a = 7.204(4) Å, b = 8.593(5) Å, c = 21.112(12) Å, α = 89.153(7)°, β = 85.294(7)°, γ = 84.604(6)°, V = 1296.7(12) Å3, Z = 2, Rgt (F) = 0.0535, wR ref(F 2) = 0.1471, T = 296(2) K.

A spiro-type ammonium based switchable dielectric material with two sequential reversible phase transitions above room temperature

A novel spiro-type hybrid undergoes two phase transitions at 336 and 357 K, accompanied by remarkable changes of H-bond interactions.