Bis(1,2-dionedioximato) complexes of Pt(ii) form linear chains of metal complexes that metallise under pressure. Through high-pressure structural, computational and conductivity measurements we show the crucial role of the ligand in dictating these properties.

High-pressure studies have been performed on the ε-form of the powerful explosive CL-20. Hydrostatic compression over the pressure range 0-12 GPa has been monitored using synchrotron powder X-ray diffraction. The potential effects of X-ray radiation damage were observed and circumvented through a follow-up compression study over the pressure range 0-7 GPa using neutron powder diffraction. This second study revealed smooth compression behaviour, and the absence of any phase transitions. Intermolecular interaction energies as obtained using PIXEL calculations did not show any discontinuity upon application of pressure. An isothermal equation of state has been determined, and the high-pressure response is supported by dispersion-corrected DFT calculations. Inelastic neutron scattering (INS) (experimental and simulated) spectra for the ε-form are in excellent agreement.

Magnetic bistability has previously been observed and evaluated in an organic thiazyl radical 1,3,5 triathia 2,4,6-triazapentalenyl (TTTA). Herein, the structure-pressure response of TTTA has been evaluated by X-ray diffraction, where...

Despite possessing the desirable crystal packing and short Pt⋯Pt stacking distances required for a large piezoresistive response, we explain why the conductivity-pressure response of the Magnus green salt [Pt(NH3)4][PtCl4] is extremely sluggish.

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