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Utilization of modified polyethylenes as macroscopic ligands
Ráliš, Václav ; Pinkas, Jiří (advisor) ; Vojtíšek, Pavel (referee)
Charles University in Prague Faculty of Science Department of Inorganic Chemistry Author: Václav Ráliš Supervisor: Mgr. Jiří Pinkas, Ph.D.prof. Consultant: RNDr. Petr Štěpnička, Ph.D., DrSc. Title: Utilization of modified polyethylenes as macroscopic ligands Termination of growing polyethylene (PE) chain by silane HSiR1 R2 R3 leads to polymers bearing chain-end silyl group (SiPE). These materials can be further modified to form polymers terminated by silanol group (PE-SiOH). Using suitable default conditions, a modified PE with relatively low molecular weight (Mn ~1000 Da) and useful solubility profile can be obtained. Due to the presence of reactive silanol or hydrosilane groups, such materials can serve as a support for grafting a wide range of metals. The aim of the thesis is to verify the possibility of grafting metals by chemical bonding on a modified PE (which in this particular case can be seen as a "slightly larger" ligand. Prepared materials will be tested with regard on their possible use in catalysis. This research is interdisciplinary at the border between inorganic (coordination chemistry) and physical chemistry (polymers, catalysis). Keywords: supported complexes, modified polyethylene, catalysis
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Preparation of ruthenium complexes bearing ibuprofene derivatives
Ráliš, Václav ; Štěpnička, Petr (advisor) ; Schulz, Jiří (referee)
Charles University in Prague Faculty of Science Department of inorganic chemistry Author: Václav Ráliš Supervisor: prof. RNDr. Petr Štěpnička, Ph.D., DSc. Consultant: Mgr. Jiří Pinkas, Ph.D Title: Preparation of ruthenium complexes bearing ibuprofene derivatives Cp* arene complexes of ruthenium with the general formula [(η6 -arene)RuCp*]X (where Cp* is pentamethylcyclopentadienyl and X is an anion in the outer sphere) have recently been the subject of the development of new anticancer drugs. The aim of this thesis was to prepare two new compounds bearing ibuprofen (ibuprofen as a racemic mixture). Two synthetic procedures were chosen for the attachment of ibuprofen, by η6 -bond and also by ester bond to the complex [(η6 -BnOH)RuCp*]Cl (3), where Bn is benzyl. The complex [(η6 -ibuprofen)RuCp*]PF6 (1HPF6) was prepared. The zwitterionic form of this complex [(η6 -ibuprofen- )RuCp*] (1) showed unexpected decarboxylation, yielding the complex [(η6 -1-ethyl-4-isobutylbenzene)RuCp*]HCO3 (2). To the best of our knowledge this kind of reaction has never been described before for this type of compounds. The complex [(η6 -BnOibuprofen)RuCp*]Cl (4) was prepared by reacting ibuprofen acyl chloride with the complex 3. Prepared complexes were characterized via 1 H, 13 C{1 H} NMR, IR spectroscopy, ESI-MS+ and melting...
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