Efficient and economical plastic waste upcycling relies on the development of catalysts capable of polymer degradation. A systematic high-throughput screening of twenty-eight polymerization catalyst precursors, belonging to the catalyst families of metallocenes, ansa-metallocenes, and hemi-and post-metallocenes, in cis-1,4-polybutadiene (PB) degradation reveals, for the first time, important structure-activity correlations. The upcycling conditions involve activation of the catalysts (at 0.18 % catalyst loading) with tri-isobutyl aluminum at 50 °C in toluene. The data indicate the ability to degrade PB is a general reactivity profile of neutral group 4 metal hydrides. A simple quantitative-structure activity relationship (QSAR) model utilizing two descriptors for the distribution of steric bulk in the active pocket and one measuring the metal ion electrophilicity reveals the degradation ability improves with increased but not overbearing steric congestion and lower electrophilicity.

Efficient and economical plastic waste upcycling relies on the development of catalysts capable of polymer degradation. A systematic high-throughput screening of twenty-eight polymerization catalyst precursors, belonging to the catalyst families of metallocenes, ansa-metallocenes, and hemi-and post-metallocenes, in cis-1,4-polybutadiene (PB) degradation reveals, for the first time, important structure-activity correlations. The upcycling conditions involve activation of the catalysts (at 0.18 % catalyst loading) with tri-isobutyl aluminum at 50 °C in toluene. The data indicate the ability to degrade PB is a general reactivity profile of neutral group 4 metal hydrides. A simple quantitative-structure activity relationship (QSAR) model utilizing two descriptors for the distribution of steric bulk in the active pocket and one measuring the metal ion electrophilicity reveals the degradation ability improves with increased but not overbearing steric congestion and lower electrophilicity.

Eine Chloroformsuspension von SnCl4 reagiert mit den Liganden bei Raumtemperatur zu den festen Addukten (I).

One of the most prevalent metabolic and reproductive disorders in women of reproductive age is polycystic ovarian syndrome (PCOS). Numerous symptoms that women with PCOS experience have a major negative influence on their standard of living. It raises the risk of numerous comorbidities, such as obesity, insulin resistance, type 2 diabetes, cardiovascular disease (CVS), infertility, and psychological conditions. A case of a 27-year-old female with PCOS is addressed. According to the report, she was successfully treated in 7 months by individualized homoeopathic treatment.

Die 3:2‐molare Umsetzung von Vanadylsulfat, Co‐, Ni‐ oder Cu‐dichlorid mit dem Titelliganden in Methanol oder Äthanol führt zu den Komplexen (I) und (II), bei Zugabe von Na‐acetat‐Puffer zu den Komplexen (III) des′ dideprotonierten Liganden.