New mononuclear ruthenium complexes of η5-cyclichydrocarbon containing azine ligands: Syntheses, spectral and structural studies

Synthesis, molecular structure analyses and DFT studies on new asymmetrical azines based Schiff bases

“…The importance given to azine derivatives due to their wide application in various scientific fields was considered a research project in our laboratory [29][30]. Different methods of synthesis of symmetrical and unsymmetrical azines are reported [3,13,31] where the first cited are easily obtained, while their asymmetrical counterparts, they are it under harsher conditions [31,[32][33]. These are prepared in two steps as described in the set of works reported in the literature, from two different aromatic derivatives aldehyde or ketone, and hydrazine hydrate [34][35] or selectively using hydrazine derivatives [36][37].…”

Mono and dinuclear half-sandwich platinum group metal complexes bearing pyrazolyl-pyrimidine ligands: Syntheses and structural studies

“…In recent years, we have been carrying out arene ruthenium complexation reactions with a variety of nitrogen-based ligands [31][32][33][34][35][36] including pyridyl-pyridazine and pyrazolyl-pyridazine ligands. Ruthenium complexes of these types of nitrogen-based ligands have a capacity to function as catalysts for the oxidation of water to oxygen [37][38][39].…”

Ruthenium half-sandwich complexes with tautomerized pyrazolyl-pyridazine ligands: Synthesis, spectroscopic and molecular structural studies

“…Arene metal complexes have been utilized as homogeneous catalysts or catalyst precursors in numerous transformations such as hydrogenation, esterification, olefin metathesis and Diels-Alder cycloaddition [3][4][5][6]. In recent years, we have been carrying out reactions of arene ruthenium dimers with a variety of nitrogen-based ligands [7][8][9][10][11][12] including pyridyl-pyridazine and pyrazolyl-pyradazine ligands. Ruthenium complexes of these types of nitrogen-based ligands have a capacity to function as catalysts for the oxidation of water to oxygen [13,14].…”

“…H NMR (400 MHz, CDCl 3 , 25°C, TMS): d = 8.53 (d,3 J H,H = 10.0 Hz, 1H),8.45 (d, 3 J H,H = 2.4 Hz, 1H), 8.27 (s, 1H), 8.19 (d, 3 J H,H = 9.6 Hz, H), 6.44 (d, 3 J H,H = 2.4 Hz, 1H), 6.34 (d, 3 J H,H = 2.4 Hz, 1H), 5.93 (d, 3 J H,H = 6.0 Hz, 1H, Ar p-cy ), 5.87 (d, 3 J H,H = 6.4 Hz, 1H, Ar p-cy ), 5.76 (d, 3 J H,H = 6.0 Hz, 1H, Ar p-cy ), 5.68 (d, 3 J H,H = 6.0 Hz, 1H, Ar p-cy ), 3.1 (sep, 3 J H,H = 6.8 Hz, 1H), 2.39 (s, 6H, CH 3 ), 2.26 (s, 3H), 1.42 (d, 3 J H,H = 7.2 Hz, 3H), 1.38 (d, 3 J H,H = 7.2 Hz, 3H).ESI-MS (m/z): 511.3 [MÀClO 4 ]. 4.3.6.…”