Oxidation-induced C-H bond activation in iridium pincer complexes.

Dehydrogenation reactions that produce molecular hydrogen are thermodynamically unfavourable. Desired is to couple them with a green driving force, such as oxidation with oxygen or an electric current. This, in turn, requires understanding of the catalyst's redox properties.

Copper(I) Catalyzed Decarboxylative Synthesis of Diareno[,]cyclooctatetraenes.

Diareno[,]cyclooctatetraenes find widespread applications as building blocks, ligands, and responsive cores in topologically switchable materials. However, current synthetic methods to these structures suffer from low yields or operational disadvantages. Here, we describe a practical three-step approach to diareno[,]cyclooctatetraenes using an efficient copper(I) catalyzed double decarboxylation as the key step.

The burden and health care use of patients with migraine and tension-type headache in post-conflict area of Serbia.

Purpose: The aim of the present study was to assess the burden and health care use of adult patients with migraine and tension type headache in a post-conflict area of Serbia.

Methods: This cross-sectional study was conducted on a representative sample of adults, living in predominantly Serb communities on the Kosovo and Metohija territory. The required data was obtained through a survey, utilizing a culturally-adapted questionnaire.

Predicting no-reflow phenomenon prior to primary percutaneous coronary intervention using a novel probability risk score derived from clinical and angiographic parameters.

Objective: We aimed to create a clinically usable probability risk score for prediction of no-reflow (NRF) phenomenon prior to primary percutaneous coronary intervention (PPCI).

Patients And Methods: This single-center and retrospective study included 1254 patients with acute ST-segment elevation myocardial infarction (STEMI) who underwent PPCI. Patients were randomly assigned into two groups in the ratio 2:1, the derivation dataset (n=840) and validation dataset (n=414).

Electro-mechanically switchable hydrocarbons based on [8]annulenes.

Pure hydrocarbons with shape and conjugation properties that can be switched by external stimuli is an intriguing prospect in the design of new responsive materials and single-molecule electronics. Here, we develop an oligomeric [8]annulene-based material that combines a remarkably efficient topological switching upon redox changes with structural simplicity, stability, and straightforward synthesis: 5,12-alkyne linked dibenzo[a,e]cyclooctatetraenes (dbCOTs). Upon reduction, the structures accommodate a reversible reorganization from a pseudo-conjugated tub-shape to a conjugated aromatic system.