Browsing by Author "Ray, Kallol"

Now showing items 1-7 of 7

2016-07-14Zeitschriftenartikel

A cobalt(II) iminoiodane complex and its scandium adduct

Kundu, Subrata; Chernev, Petko; Engelmann, Xenia; Chung, Chan Siu; Dau, Holger; Bill, Eckhard; England, Jason; Nam, Wonwoo; Ray, Kallol

In addition to oxometal [Mn+[double bond, length as m-dash]O] and imidometal [Mn+[double bond, length as m-dash]NR] units, transient metal–iodosylarene [M(n−2)+–O[double bond, length as m-dash]IPh] and metal–iminoiodane ...
2020-12-21Zeitschriftenartikel

A Pseudotetrahedral Terminal Oxoiron(IV) Complex: Mechanistic Promiscuity in C−H Bond Oxidation Reactions

Warm, Katrin; Paskin, Alice; Kuhlmann, Uwe; Bill, Eckhard; Swart, Marcel; Haumann, Michael; Dau, Holger; Hildebrandt, Peter; Ray, Kallol

S=2 oxoiron(IV) species act as reactive intermediates in the catalytic cycle of nonheme iron oxygenases. The few available synthetic S=2 FeIV=O complexes known to date are often limited to trigonal bipyramidal and very ...
2016-07-28Zeitschriftenartikel

Changing the chemical and physical properties of high valent heterobimetallic bis-(μ-oxido) Cu–Ni complexes by ligand effects

Kafentzi, Maria-Chrysanthi; Maylis, Orio; Réglier, Marius; Yao, Shenglai; Kuhlmann, Uwe; Hildebrandt, Peter; Driess, Matthias; Simaan, A. Jalila; Ray, Kallol

Two new heterobimetallic [LNiO2Cu(RPY2)]+ (RPY2 = N-substituted bis 2-pyridyl(ethylamine) ligands with R = indane, 3a or R = Me, 3b) complexes have been spectroscopically trapped at low temperatures. They were prepared by ...
2021-04-11Zeitschriftenartikel

Ligand-Constraint-Induced Peroxide Activation for Electrophilic Reactivity

Chandra, Anirban; Ansari, Mursaleem; Monte-Pérez, Inés; Kundu, Subrata; Rajaraman, Gopalan; Ray, Kallol

An end-on μ-1,2-peroxodicobalt(III) complex 1 involving a non-heme ligand system, L1, supported on a Sn6O6 stannoxane core has been found to be a reactive electrophile that is capable of initiating hydrogen atom and oxygen ...
2020-05-25Zeitschriftenartikel

Redox Potentials of High‐Valent Iron‐, Cobalt‐, and Nickel‐Oxido Complexes: Evidence for Exchange Enhanced Reactivity

Comba, Peter; Löhr, Anna‐Maria; Pfaff, Florian; Ray, Kallol

The ferrocene titration method has been employed to determine the one‐electron reduction potentials of a series of oxido‐iron(IV), oxido‐cobalt(IV) and oxido/hydroxido‐nickel(III) complexes based on the same tetradentate ...
2021-09-08Zeitschriftenartikel

Spektroskopische Charakterisierung eines reaktiven [Cu2(μ‐OH)2]2+ Intermediates in Cu/TEMPO‐katalysierten aeroben Alkoholoxidationen

Tripodi, Guilherme; Andris, Erik; Mebs, Stefan; Kuhlmann, Uwe; Dau, Holger; Hildebrandt, Peter; Roithova, Jana; Ray, Kallol; Ray, Kallol

CuI/TEMPO-Katalysatorsysteme (TEMPO=2,2,6,6-Tetramethylpiperidinoxyl) sind vielseitige Katalysatoren für aerobe Alkoholoxidationsreaktionen zur selektiven Synthese von Aldehyden. Jedoch sind mehrere Aspekte des ...
2020-06-03Zeitschriftenartikel

Synthesis, Characterization, and Reactivity of a Series of Homo‐ and Hetero‐dinuclear Complexes based on an Asymmetric FloH Ligand System

Battistella, Beatrice; Heims, Florian; Cula, Beatrice; Ray, Kallol

In a previous communication we reported the site‐directed generation of a heterodinuclear FeIIICuII complex (1 ) by using an asymmetric dinucleating ligand FloH. The iron(III) ion was introduced first on the preferential ...