Characterization of copper complexes with derivatives of the ligand (2-aminoethyl)bis(2-pyridylmethyl)amine (uns-penp) and their reactivity towards oxygen

Mechanistic studies on catalytic alkane oxidation by Murahashi's O2/copper(ii)/aldehyde system

“…m -Chloroperbenzoic acid ( m -CPBA) was purified by recrystallization from CH 2 Cl 2 in a refrigerator kept at −20 °C, and the purity was determined to be 80–90% by redox titration using NaI. Ligands (TMPA, 44 TEPA, 45 Me 2 -uns-penp, 46 TMG 3 tren 47 and Me 2 -pp3 (ref. 48)) and Cu II -complexes ([Cu II (Me 6 tren)(CH 3 CN)](ClO 4 ) 2 ( 1 ), 49 [Cu II (TMPA)(CH 3 CN)](ClO 4 ) 2 ( 5 ) 50 and [Cu II (TEPA)(OTf)](OTf) ( 6 ) 51 ) were prepared according to reported procedures.…”

“…m-Chloroperbenzoic acid (m-CPBA) was purified by recrystallization from CH 2 Cl 2 in a refrigerator kept at −20 °C, and the purity was determined to be 80-90% by redox titration using NaI. Ligands (TMPA, 44 TEPA, 45 Me 2 -uns-penp, 46 Catalysis Science & Technology Paper cryostat cell holder USP-203. Near IR spectra were taken on a Jasco V-670.…”

Development of comprehensive approaches to characterizing CuII complexes: structures in solution and solid‐state, dynamic behavior, and bioactivity

“…Copper contributes to numerous processes in living nature and deserves special attention due to the regulation of redox processes, since it is a part of active sites in many enzymes, exhibiting a variable coordination number from 4 to 6. [1][2][3][4] Taking into account these and other reasons, extensive investigations of Cu I -N-donors and Cu II -N-donors complexes' bioactivity are provided to investigate their binding with DNA, [3,[5][6] redox processes, [3,[6][7][8] cytotoxicity, [3,6,[9][10] and antibacterial properties. [11][12][13] Despite a detailed study of these complexes' biological activity, few authors investigate their structure in solution [14][15][16] and structure-property relation, usually focused on solid-state structures.…”

Reactivity of Copper Complexes with Tripodal Tetradentate Ligands based on Camphoric Acid towards Dioxygen

“…For example, the ligand Me 2 -uns-penp (3) formed a dimeric copper (trans-1,2-peroxido) complex. [13,19] With tetraphenylborate as an anion, it was possible to stabilize this usually unstable intermediate even at room temperature. With this peroxido species, the oxidation of toluene could be achieved.…”

“…With an aminoethyl group for R (Scheme 2), the tripodal ligand uns‐penp [18] was obtained, and derivatives of this ligand were applied successfully for stabilizing copper oxygen intermediates. For example, the ligand Me 2 ‐uns‐penp ( 3 ) formed a dimeric copper ( trans ‐1,2‐peroxido) complex [13,19] . With tetraphenylborate as an anion, it was possible to stabilize this usually unstable intermediate even at room temperature.…”