Thermal reaction of a (hydrido)(selenolato)platinum(II) complex having a dibenzobarrelenyl group leading to three cyclometalations.
The thermal reaction of a (dibenzobarreleneselenolato)(hydrido)platinum(ii) complex gave two four-membered selenaplatinacycles, one of which is formed by hydroplatination of the Pt-H bond to the etheno bridge and the other is a vinylic C-H bond activation product, and a five-membered selenaplatinacycle formed by an aromatic C-H bond activation.
Strong Solid‐State Phosphorescence of 1,2‐Telluraplatinacycles Incorporated into Rigid Dibenzobarrelene and Triptycene Skeletons
Four- and five-membered 1,2-telluraplatinacycles incorporated into dibenzobarrelene and triptycene skeletons were synthesized by the reaction of bis(dibenzobarrelenyl) ditelluride and bis(triptycyl) ditelluride, respectively, with [Pt(η2-norbornene)(PPh3)2] in the presence of PPh3. These complexes emit strong, orange phosphorescence in the solid state at room temperature (λem = 622–676 nm). Ligand-exchange reactions of a five-membered telluraplatinacycle with bidentate phosphine ligands gave a series of derivatives that emitted a range of colors (blue to orange, λem = 507–596 nm) with high emission quantum yields (max. ΦF = 0.93) in the solid state at room temperature, for which vapoluminescence was observed.
Preparation courses for a medical admissions test: effectiveness contrasts with opinion
Objectives  The Undergraduate Medicine and Health Sciences Admissions Test (UMAT) is used to rank applicants for admission to many medical schools. This study aimed to determine the effects of preparation courses on UMAT performance and on students’ perceptions of their performance.