Publications by authors named "L P Sanchez-Barba"
Article Synopsis
- Scorpionate ligands have gained importance in coordination chemistry and catalysis since the 1960s, known for their stable tridentate coordination and ability to modify chemical properties.
- This review focuses on scorpionate complexes, particularly those based on tris(1-pyrazol-1-yl)borate and bis(1-pyrazol-1-yl)methane, as effective catalysts for producing sustainable polymers like biorenewable polylactides (PLAs) and other eco-friendly materials.
- It highlights the performance of various metal catalysts, including magnesium, calcium, zinc, and rare-earth metals, aiming to inform future research on sustainable polymerization processes.
New and simple ligand design strategies for the preparation of versatile metal-based catalysts capable of operating under greener and eco-friendly conditions in several industrially attractive processes are in high demand for society development. We present the first nucleophilic addition of an organolithium to ketenimines which incorporates a stereogenic centre in an N-donor atom to prepare new enantiopure NNN-donor scorpionates. We have also verified its potential utility as a valuable scaffold for chirality induction through the preparation of inexpensive, non-toxic and asymmetric zinc complexes.
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- Novel alkyl zinc complexes with acetamidate/thioacetamidate ligands were synthesized and showed varying coordination modes influenced by their electronic and steric properties.
- These complexes were found to effectively catalyze hydroelementation reactions of alkynyl alcohol/acid substrates, leading to enol ether or unsaturated lactone products under mild conditions.
- Kinetic studies revealed that the reactions are first-order with respect to the catalyst and zero-order in alkynyl substrate, while DFT calculations indicated a mechanism involving an alkoxide-zinc intermediate formed through protonolysis of the Zn-alkyl bond.
Objective: To evaluate the prevalence of gastro-intestinal parasites in human remains from Late Antiquity (5th - 7th c.) Granada (Spain).
Materials: The study included pelvic and cranial control samples from 17 skeletons from the archaeological sites of Los Mondragones (n = 13) and Rafael Guillén (n = 4).
Objective: To investigate the presence of trepanations in an early Modern Age, skeletal collection documented in medical treatises but infrequently reported in osteological collections.
Materials: Analyses were conducted on 387 non-adult crania from the ossuary in the church of the Assumption of Valdepeñas (16th - 18th C.), Ciudad Real, Spain.