Trifluoromethyl Fluorosulfonate (CFOSOF) and Trifluoromethoxy Sulfur Pentafluoride (CFOSF) - Two Gaseous Sulfur(VI) Compounds with Insulating Properties.

In this work, we analyzed trifluoromethyl fluorosulfonate (CFOSOF) and trifluoromethoxy sulfur pentafluoride (CFOSF) regarding their potential use as dielectrics by investigating some of their intrinsic and extrinsic properties. Both compounds show a higher breakdown voltage than SF with averaged relative breakdown voltages of 1.3±0.

Epigallocatechin-3-gallate Inhibits Cu(II)-Induced β-2-Microglobulin Amyloid Formation by Binding to the Edge of Its β-Sheets.

Epigallocatechin-3-gallate (EGCG) is a catechin found in green tea that can inhibit the amyloid formation of a wide variety of proteins. EGCG's ability to prevent or redirect the amyloid formation of so many proteins may reflect a common mechanism of action, and thus, greater molecular-level insight into how it exerts its effect could have broad implications. Here, we investigate the molecular details of EGCG's inhibition of the protein β-2-microglobulin (β2m), which forms amyloids in patients undergoing long-term dialysis treatment.

Perfluoro Alkyl Hypofluorites and Peroxides Revisited.

A more convenient synthesis of the perfluoro alkyl hypofluorite (F C) COF as well as the hitherto unknown (C F )(F C) COF compound is reported. Both hypofluorites can be prepared by use of the corresponding tertiary alcohols R OH and elemental fluorine in the presence of CsF. An appropriate access to these highly reactive hypofluorites is crucial.

Application of SPOT chip for transcutaneous oximetry.

This response is provided to address the questions raised in the letter to the editor by Henni et al. on our manuscript (Kmiec et al. Magn Reson Med 2019;81:781-794) describing the development of a new method for transcutaneous oxygen measurement in humans based on electron paramagnetic resonance (EPR) technology using SPOT chip.

No Fear of Perfluorinated Peroxides: Syntheses and Solid-State Structures of Surprisingly Inert Perfluoroalkyl Peroxides.

We report on the solid-state structures of bis(nonafluoro-tert-butyl) peroxide [(F C) CO] and bis(undecafluoro-2-methyl-2-butyl) peroxide [(C F )(F C) CO] . These peroxides were prepared from the corresponding hypofluorites and fluorinated silver wool. The solid-state structures obtained after in situ crystallisation show unusual COOC dihedral angles of 180°, as well as elongated O-O bonds because of the bulky perfluorinated alkyl groups.

Transcutaneous oxygen measurement in humans using a paramagnetic skin adhesive film.

Purpose: Transcutaneous oxygen tension (TcpO ) provides information about blood perfusion in the tissue immediately below the skin. These data are valuable in assessing wound healing problems, diagnosing peripheral vascular/arterial insufficiency, and predicting disease progression or the response to therapy. Currently, TcpO is primarily measured using electrochemical skin sensors, which consume oxygen and are prone to calibration errors.

The tris(trifluoromethyl)methyl phosphonium ion, P(CF(3))(3)CH(3)(+), preparation and structure.

The P(CF(3))(3)CH(3)(+) ion is synthesized as P(CF(3))(3)CH(3)(+)AsF(6)(-) by methylation in a MeF/SO(2)/AsF(5) system or as P(CF(3))(3)CH(3)(+)Sb(2)F(11)(-) in a MeF/HF/SbF(5) system at low temperatures. In contrast to (CF(3))(3)(CH(3))P(+)AsF(6)(-), P(CF(3))(3)CH(3)(+)Sb(2)F(11)(-) is a stable, colorless crystalline solid. A crystal structure determination shows the presence of a slightly distorted tetrahedral phosphonium cation with P-C(F) distances of 188.

Systematic reactions of [Pt(PF3)4].

Tetrahedral [Pt(PF(3))(4)] reacts with H(+) to form trigonal bipyramidal [Pt(PF(3))(4)H](+). This in turn looses PF(3) to form square-planar [Pt(PF(3))(3)H](+). The complex [Pt(PF(3))(4)] can be oxidized with AsF(5) to form the square-planar complex, [Pt(PF(3))(4)](2+), which can be more conveniently obtained from PtF(4) and PF(3) in HF/SbF(5) solution.

Solid state molecular structures of transition metal hexafluorides.

Single-crystal structure determinations of all nine transition metal hexafluorides (Mo, Tc, Ru, Rh, W, Re, Os, Ir, and Pt) at -140 degrees C are presented. All compounds crystallize alike and have the same molecular structure. The bond length sequence r(w-F) congruent with r(Re-F) congruent with r(Os-F) < r(Ir-F) < r(Pt-F) is confirmed and paralleled by the sequence r(Mo-F) congruent with r(Tc-F) congruent with r(Ru-F) < r(Rh-F).