Discovering SnB: a half-sandwich structure with double aromaticity and pathways to molecular machines.

Numerous boron-based molecular fluxional models, such as the Wankel motor, tank treads B and BC, and the Earth-Moon system BeB, have been widely recognized for their potential to develop molecular machines. From a series of tin-doped boron clusters SnB ( = 5-14), the half-sandwich structure SnB is found to possess high relative energy stability, and a HOMO-LUMO gap of 4.33 eV.

Aromatic and magnetic properties in a series of heavy rare earth-doped Ge cluster anions.

A series of pentagonal bipyramidal anionic germanium clusters doped with heavy rare earth elements, (RE = Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), have been identified at the PBE0/def2-TZVP level using density functional theory (DFT). Our findings reveal that the centrally doped pentagonal ring structure demonstrates enhanced stability and heightened aromaticity due to its uniform bonding characteristics and a larger charge transfer region. Through natural population analysis and spin density diagrams, we observed a monotonic decrease in the magnetic moment from Gd to Yb.

Mammography and MRI manifestations of breast angiosarcoma.

Background: Breast angiosarcoma is rare and previous studies only focus on its pathology. This study aimed to summarize its imaging features.

Methods: Overall 17 patients pathologically confirmed with breast angiosarcoma were recruited.

Copper and manganese: two concordant partners in the catalytic oxidation of p-cresol to p-hydroxybenzaldehyde.

Copper and manganese were found to be two concordant partners in the synthesis of p-hydroxybenzaldehyde from p-cresol; under mild conditions, this research realised 95.6% selectivity for p-hydroxybenzaldehyde at 98.5% conversion of p-cresol.