Search Results - "Ojwach, Stephen O."

Liquid-liquid extraction of copper(II), zinc(II), cadmium(II), and lead(II) from aqueous solution and sewage effluent using phenoxy-amino ligands by Nyamato, George S, Wambugu, Kelvin, Kiratu, John, Ojwach, Stephen O

“…The phenoxy-amino ligands 2-(((2-(diethylamino)ethyl)amino)methyl)phenol (L1) and 2-(((2-mercaptoethyl)amino)methyl)-phenol (L2) were studied as model…”
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Fischer Carbene Complexes of Iridium(I) for Application in Catalytic Transfer Hydrogenation by Ramollo, G. Kabelo, Strydom, Ian, Fernandes, Manuel A, Lemmerer, Andreas, Ojwach, Stephen O, van Wyk, Juanita L, Bezuidenhout, Daniela I

“…New examples of the very rare class of iridium­(I) Fischer carbene complexes (FCCs) are reported from the facile transmetalation from group 6 FCCs…”
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Nickel(II) complexes bearing pyrazolylpyridines: synthesis, structures and ethylene oligomerization reactions by Nyamato, George S., Alam, Mohd. Gulfam, Ojwach, Stephen O., Akerman, Matthew P.

“…Reactions of 2‐bromo‐6‐(3,5‐dimethyl‐1H‐pyrazol‐1‐yl)pyridine (L1) and 2,6‐bis(3,5‐dimethyl‐1H‐pyrazol‐1‐yl)pyridine (L2) with NiCl2 and NiBr2 led to the…”
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Review of comparative studies of cytotoxic activities of Pt(II), Pd(II), Ru(II)/(III) and Au(III) complexes, their kinetics of ligand substitution reactions and DNA/BSA interactions by Omondi, Reinner O., Ojwach, Stephen O., Jaganyi, Deogratius

“…[Display omitted] •Kinetics data, DNA/BSA binding studies and cytotoxicity are summarized.•Correlations between substitution kinetics reactions and DNA/BSA…”
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Electronic and ring size effects of N-heterocyclic carbenes on the kinetics of ligand substitution reactions and DNA/protein interactions of their palladium(II) complexes by Omondi, Reinner O., Jaganyi, Deogratius, Ojwach, Stephen O.

“…The synthesis, substitution kinetics and DNA/BSA interactions of four cationic Pd(II) complexes [Pd( 1 )Cl]BF 4 ( Pd1 ), [Pd( 2 )Cl]BF 4 ( Pd2 ), [Pd( 3 )Cl]BF…”
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Piano‐stool dinuclear ruthenium (II) complexes of pyrazine‐carboxylate/carboxamide ligands: Structural studies and catalytic transfer hydrogenation of ketones by Kumah, Robert T., Ojwach, Stephen O.

“…Reactions of ligand pyrazine‐2‐carboxylic acid ( HL1 ) with [Ru(η 6 ‐ p ‐cymene)Cl 2 ] 2 precursor gave the dinuclear piano‐stool ruthenium (II) complex [{Ru(η…”
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Palladium(II) complexes of tridentate bis(benzazole) ligands: Structural, substitution kinetics, DNA interactions and cytotoxicity studies by Omondi, Reinner O., Bellam, Rajesh, Ojwach, Stephen O., Jaganyi, Deogratius, Fatokun, Amos A.

“…Reactions of 2,6-bis(benzimidazol-2-yl)pyridine (L1), 2,6-bis(benzoxazol-2-yl)pyridine (L2), and 2,6-bis(benzothiazol-2-yl)pyridine (L3) with [Pd(NCMe)2Cl2] in…”
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Synthesis and Applications of (Pyridyl)imine Fe(II) Complexes as Catalysts in Transfer Hydrogenation of Ketones by Kumah, Robert T., Vijayan, Paranthaman, Ojwach, Stephen O.

“…Chiral (pyridyl)imine Fe(II) complexes, [Fe( L1 ) 3 ] 2+ [PF 6 − ] 2 , ( Fe1 ), [Fe( L2 ) 3 ] 2+ [PF 6 − ] 2 , ( Fe2 ), [Fe( L3 ) 3 ] 2+ [PF 6 − ] 2 ( Fe3 ),…”
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Ru(II) complexes containing (2-(pyren-1-ylmethylene)hydrazinyl)benzothiazole: Synthesis, solid-state structure, computational study and catalysis in N-alkylation reactions by Murugan, Kaliyappan, Vijayapritha, Subbarayan, Viswanathamurthi, Periasamy, Saravanan, Kandasamy, Vijayan, Paranthaman, Ojwach, Stephen O.

“…Ruthenium(II) complexes containing (2-(pyren-1-ylmethylene)hydrazinyl)benzothiazole efficiently catalyze the N-alkylation of amines with alcohols. The reaction…”
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Introduction to the Young African Researchers collection by Egbedina, Abisola O, Lamola, Jairus L, Adly, Mina Shawky, Ojwach, Stephen O

“…Abisola O. Egbedina, Jairus L. Lamola, Mina Shawky Adly, and Stephen O. Ojwach introduce the Young African Researchers collection…”
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Nickel(II) complexes chelated by N^N (benzimidazolylmethyl)amine ligands: Synthesis and catalytic behavior in tandem ethylene oligomerization and Friedel-Crafts alkylation reactions by Ngcobo, Makhosonke, Ojwach, Stephen O.

“…[Display omitted] •Nickel(II) complexes of (benzimidazolylmethyl)amine ligands synthesized.•The complexes form active catalysts in ethylene oligomerization…”
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Methoxycarbonylation of olefins catalysed by homogeneous palladium(II) complexes of (phenoxy)imine ligands bearing alkoxy silane groups by Akiri, Saphan O., Ojwach, Stephen O.

“…[Display omitted] •Four bis(chelated) and mono(chelated) palladium complexes synthesized.•All the complexes form active catalysts in methoxycarbonylation of…”
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Sterically hindered (pyridyl)benzamidine palladium(II) complexes: Syntheses, structural studies, and applications as catalysts in the methoxycarbonylation of olefins by Akiri, Saphan O., Ojwach, Stephen O.

“…Reactions of ligands (E)‐N′‐(2,6‐diisopropylphenyl)‐N‐(4‐methylpyridin‐2‐yl)benzimidamide (L1),…”
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Novel Metallomacrocyclic Carboxamide Mn(II) Complexes as Efficient Catalysts for the Transfer Hydrogenation of Ketones by Kumah, Robert T., Migwi, Francis K., Schmitz, Markus, Thiel, Werner R., Ojwach, Stephen O.

“…Herein, we present the first metallomacrocyclic Mn(II) complexes as efficient catalysts for the transfer hydrogenation of ketones. The dinuclear Mn(II)…”
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Preparation, characterization of fish scales biochar and their applications in the removal of anionic indigo carmine dye from aqueous solutions by Achieng, George O, Kowenje, Chrispin O, Lalah, Joseph O, Ojwach, Stephen O

“…The preparation and applications of Tilapia (Oreochromis niloticus) fish scale biochars (FSB) as an adsorbent in the removal of indigo carmine dye (ICD) from…”
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Synthesis, substitution kinetics, DNA/BSA binding and cytotoxicity of tridentate N^E^N (E = NH, O, S) pyrazolyl palladium(II) complexes by Omondi, Reinner O., Fadaka, Adewale O., Fatokun, Amos A., Jaganyi, Deogratius, Ojwach, Stephen O.

“…The pincer complexes, [Pd( L 1 )Cl]BF 4 ( PdL 1 ), [Pd( L 2 )Cl]BF 4 ( PdL 2 ) , [Pd( L 3 )Cl]BF 4 ( PdL 3 ), [Pd( L 4 )Cl]BF 4 ( PdL 4 ) were prepared by…”
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Cover Feature: Novel Metallomacrocyclic Carboxamide Mn(II) Complexes as Efficient Catalysts for the Transfer Hydrogenation of Ketones (ChemCatChem 23/2023) by Kumah, Robert T., Migwi, Francis K., Schmitz, Markus, Thiel, Werner R., Ojwach, Stephen O.

“…The Cover Feature shows that there is light on the application of Mn(II) complexes as catalysts in the conversion of ketones to alcohols. In their Research…”
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Applications of imino-pyridine Ni(II) complexes as catalysts in the transfer hydrogenation of ketones by Tsaulwayo, Nokwanda, Kumah, Robert.T., Ojwach, Stephen.O.

“…•The Ni(II) complexes form effective catalysts in the transfer hydrogenation of ketones.•Catalytic activities controlled by electronic and steric properties of…”
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Comparative Study of Homogeneous and Silica Immobilized N^N and N^O Palladium(II) Complexes as Catalysts for Hydrogenation of Alkenes, Alkynes and Functionalized Benzenes by Akiri, Saphan O., Ngcobo, Nondumiso L., Ojwach, Stephen O.

“…This work reports the use of homogeneous and silica immobilized palladium(II) complexes of ligands (2-phenyl-2-((3(triethoxysilyl)propyl)imino)ethanol) ( L1),…”
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Palladium(II) complexes of (pyridyl)imine ligands as catalysts for the methoxycarbonylation of olefins by Zulu, Zethu, Nyamato, George S., Tshabalala, Thandeka A., Ojwach, Stephen O.

“…[Display omitted] •(Imino)pyridine Pd(II) complexes syntheses and structurally characterized.•The Pd(II) complexes form active catalysts in…”
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