Symmetrical and Mixed Tris(acyl)phosphines: Synthesis, Oxidation and Photochemistry.

Invited for the cover of this issue are the groups of M. Haas, G. Gescheidt and H.

Symmetrical and Mixed Tris(acyl)phosphines: Synthesis, Oxidation and Photochemistry.

Herein, we present a convenient synthesis for symmetrical and mixed substituted tris(acyl)phosphines (TAPs) starting from red phosphorus. All TAPs exhibit a phosphaalkene-acylphosphine equilibrium, which was investigated in detail by variable-temperature (VT) NMR spectroscopy supported by density-functional theory (DFT) calculations. Depending on the substituents, two phosphaalkene derivatives and ten acylphosphine derivatives could be isolated.

Mpox (Monkeypox) Infection During Pregnancy.

Background: An mpox (formerly "monkeypox") outbreak began in 2022, leading to infection in special populations, including pregnant individuals.

Case: We present a case of an individual who presented with a labial ulcer and subsequent papular rash at 31 weeks of gestation. She was diagnosed with mpox infection and was treated with tecovirimat.

Bis(acyl)phosphide - Ambidentate Ligands for the Synthesis of Group 14 and 15 Main Group Element Compounds.

The reactivity of the bis(acyl)phosphide ion [P(COR) ] (BAP , R=Ph, Mes) with silicon halides SiX (X=Cl, Br) and pnictogen chlorides ECl (E=As, Sb and Bi) was investigated. The reaction with SiX leads to the hexacoordinate silanes SiX (BAP) in which BAP is coordinated in the chelating κ -O,O' mode, analogously to acac . Unexpectedly, the coordination behaviour of BAP differs from the one of acac in the interpnictogen compounds E(BAP) (E=As, Sb) in which the formation of E-P bonds is favoured over κ -O,O' chelation via the oxygen centres.