Reactive Noble-Gas Compounds Explored by 3D Electron Diffraction: XeF-MnF Adducts and a Facile Sample Handling Procedure.

Recent advances in 3D electron diffraction (3D ED) have succeeded in matching the capabilities of single-crystal X-ray diffraction (SCXRD), while requiring only submicron crystals for successful structural investigations. One of the many diverse areas to benefit from the 3D ED structural analysis is main-group chemistry, where compounds are often poorly crystalline or single-crystal growth is challenging. A facile method for loading and transferring highly air-sensitive and strongly oxidizing samples at low temperatures to a transmission electron microscope (TEM) for 3D ED analysis was successfully developed and tested on xenon(II) compounds from the XeF-MnF system.

Crystal structure of CaSiF·2HO(2) and reevaluation of the Si-F bond-valence parameter .

The structure of a second polymorph of CaSiF·2HO [calcium hexafluorido-silicate dihydrate; space group 2/ (No. 13), Pearson symbol 2] was elucidated by single-crystal X-ray diffraction. It arose as an unexpected product when soda-lime glass was attacked by HF.

()-2-[()-2,2,2-Tri-fluoro-1-hy-droxy-eth-yl]-1-tetra-lone.

The crystal structure of the title compound, CHFO, was elucidated by low-temperature single-crystal X-ray diffraction. The enanti-opure compound crystallizes in the Sohncke space group 2 and features one mol-ecule in the asymmetric unit. The structure displays inter-molecular O-H⋯O hydrogen bonding, which links the mol-ecules into infinite chains propagating parallel to [010].