A5034810660- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal complexes synthesis and properties
- Metal-Catalyzed Oxygenation Mechanisms
- Crystallography and molecular interactions
- Organometallic Compounds Synthesis and Characterization
- Magnetism in coordination complexes
- Metal-Organic Frameworks: Synthesis and Applications
- Porphyrin and Phthalocyanine Chemistry
- Crystal structures of chemical compounds
- Corrosion Behavior and Inhibition
- Metalloenzymes and iron-sulfur proteins
- Polyoxometalates: Synthesis and Applications
- Inorganic Chemistry and Materials
- Molecular Sensors and Ion Detection
- Crystal Structures and Properties
- Synthesis and biological activity
- Thermal and Kinetic Analysis
- Lanthanide and Transition Metal Complexes
- Inorganic and Organometallic Chemistry
- Luminescence and Fluorescent Materials
- Metal Extraction and Bioleaching
- Photosynthetic Processes and Mechanisms
- Free Radicals and Antioxidants
- Chemical Synthesis and Reactions
Goa University
2015-2025
University of Aberdeen
2020
Ewha Womans University
2008-2017
Kiel University
2004
Give me an "O"! Mononuclear nonheme iron(IV) oxo complexes have been generated using water as oxygen source and cerium(IV) oxidant. The high-yield oxygenation of organic substrates in this system (see picture, Fe green, O red, N blue, C gray) is catalyzed by iron(II) complexes. the oxygenated products has assigned unambiguously isotopic labeling experiments.
A comprehensive experimental and theoretical study of the reactivity patterns reaction mechanisms in alkane hydroxylation, olefin epoxidation, cyclohexene oxidation, sulfoxidation reactions by a mononuclear nonheme ruthenium(IV)–oxo complex, [RuIV(O)(terpy)(bpm)]2+ (1), has been conducted. In hydroxylation (i.e., oxygen rebound vs non-rebound mechanisms), both results show that substrate radical formed via rate-determining H atom abstraction alkanes 1 prefers dissociation over desaturation...
We show by experiments that nonheme Fe(IV)O species react with cyclohexene to yield selective hydrogen atom transfer (HAT) reactions virtually no C═C epoxidation. Straightforward DFT calculations reveal, however, epoxidation on the S = 2 state possesses a low-energy barrier and should contribute substantially oxidation of species. By modeling selectivity this two-site reactivity, we an interplay tunneling spin inversion probability (SIP) reverses apparent barriers prefers exclusive 1 HAT...
Activation of dioxygen (O
Two-state reactivity involving close triplet ground and quintet excited states is responsible for the opposite trends of FeIV oxo complexes in O-transfer H-abstraction reactions dependence on electron richness axial ligand X (see picture), as shown by comparison with RuIV analogues, which both reactivities are solely governed electrophilicity complex because state inaccessible. Supporting information this article available WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z705880_s.pdf...
Abstract This paper investigates the structural diversity and non‐covalent interactions in eight newly synthesized [Zn(II)(cyclam)] 2+ compounds ( 1 – 8 ) featuring ortho ‐substituted benzoate ligands. Compounds 2 exhibit 1D polymeric structures, wherein aqua ligands bridge cationic anionic units, resulting [Zn (μ‐H O) (cyclam)(L) 4 ] compounds. Here, L = o ‐methyl , ‐methoxy cyclam 1,4,8,11‐tetraazacyclotradecane. Conversely, using hydroxy nitro substituents at position results formation of...
Abstract Mit Cer(IV) als Oxidationsmittel und Wasser Sauerstoffquelle wurden einkernige Nichthäm‐Eisen(IV)‐Oxo‐Komplexe erhalten. Die in hoher Ausbeute verlaufende Oxygenierung organischer Substrate diesem System (siehe Schema; Fe grün, O rot, N blau, C grau) wird durch Eisen(II)‐Komplexe katalysiert. Quelle des Sauerstoffs den Eisen(IV)‐Oxo‐Komplexen oxygenierten Produkten wurde Isotopenmarkierung eindeutig bestimmt. magnified image
A dinuclear Ni( ii ) compound, [Ni 2 (μ-van) (μ-OAc)(NCS) 3 (H O)]·5H O 1 with p -vanillin and acetato bridging ligands have been structurally characterized tested for catecholase-like biological activities.
A mononuclear high-valent trans-dioxoruthenium(VI) complex, trans-[Ru(VI)(TMC)(O)2](2+) (TMC = 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane), was synthesized and characterized by various spectroscopic techniques X-ray crystallography. The reactivity of the complex investigated in hydride transfer hydrogen atom reactions. mechanism from dihydronicotinamide adenine dinucleotide (NADH) analogues to trans-[Ru(VI)(TMC)(O)2](2+), which proceeds via a proton-coupled electron (PCET),...
Abstract Two new tetrathiotungstates (pipH 2 )[WS 4 ] ( 1 ) and (trenH · H O (pip = piperazine tren tris(2‐aminoethyl)amine) were synthesized characterized by elemental analysis, infrared, Raman, UV‐Visible NMR spectroscopy, single crystal X‐ray crystallography, thermoanalysis. In the amines pip are diprotonated they linked to [WS 2− tetrahedra via weak N‐H···S , N‐H···O hydrogen bonds. atoms of molecule have also contacts S atoms. The strength number S···H interactions affect W‐S bond...
An underexplored reaction of pyrazine (rigid and linear) succinic acid (flexible) with Co(NO3)2·6H2O afforded four new coordination polymers (CPs): [Co(H2O)(pyz)(suc)] (1), [Co(H2O)2(pyz)(suc)] (2), [Co(H2O)4(pyz)](suc) (3) [Co2(H2O)2(pyz)(suc)2] (4), as well [Co(HCO2)2(pyz)] (5) being lately reported along well-known 6 7. The CPs were obtained stable crystalline materials characterized by conventional solid-state techniques, including X-ray crystallography. Hydrothermally produced compounds...
Mononuclear nonheme Cu( ii ) compounds 1 and 2 were synthesized characterized by elemental analysis, ESI-MS, EPR, single-crystal X-ray diffractrometry.
Abstract Three new tetrathiomolybdates (pipH 2 )[MoS 4 ] (1), (trenH ]·H O (2) and [(prop) N] - [MoS (3) (pip = piperazine, tren tris(2-aminoethyl)amine prop n-propyl) were synthesized characterized by elemental analysis, infrared spectroscopy, single crystal X-ray crystallography, thermoanalysis. All compounds prepared the base promoted cation exchange method, i.e. reaction of ammonium salt 2− with corresponding organic amine or hydroxide. In 1 amines pip are diprotonated they linked to...
A new non-heme Mn(<sc>iii</sc>)–peroxo (<bold>1a</bold>) has been generated, characterized and reactivity is in aldehyde deformylation reaction. nucleophilic of 1a oxidation proposed.
Small molecule activation and their transfer reactions in biological or catalytic are greatly influenced by the metal-centers ligand frameworks. Here, we report metal-directed nitric oxide (NO) chemistry low-spin mononuclear {Co(NO)}8, [(12-TMC)CoIII(NO-)]2+ (1-CoNO, S = 0), {Cr(NO)}5, ([(BPMEN)Cr(NO)(Cl)]+) (4-CrNO, 1/2) complexes. 1-CoNO transfers its bound NO moiety to a high-spin [(BPMEN)CrII(Cl2)] (2-Cr, 2) generates 4-CrNOvia an associative pathway; however, did not observe reverse...