Catalysts, Volume 12, Issue 9
September 2022 - 145 articles
- Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
- You may sign up for email alerts to receive table of contents of newly released issues.
- PDF is the official format for papers published in both, html and pdf forms. To view the papers in pdf format, click on the "PDF Full-text" link, and use the free Adobe Reader to open them.
Cover Story: The reaction of [Ti(OR)4] (R = Me, nPr, iPr, tBu) with the acids 2,2’-Ph2C(X)(CO2H), where X = OH, NH2 (i.e., benzilic acid and 2,2’-diphenylglycine, respectively), led to the isolation of mono-, bi-, tri-, or tetra-metallic products. In the case of the ring-opening polymerization (ROP) of ε-caprolactone, all systems except for R = nPr, X = NH2 (this system exhibited the best performance: ≥ 99% within 6 min at 100 °C) exhibited a lengthy induction period (≤ 285 min) and were quite sluggish; products were of a moderate to high molecular weight. For the ROP of rac-lactide, there was no induction period, and higher molecular weight products were obtained; the system R = iPr, X = OH exhibited the fastest kinetics. Comparative ROP studies using the parent [Ti(OR)4] starting materials revealed high conversions but poorer control versus the acid-derived complexes. View this paper 
