A5101683415- Metal-Organic Frameworks: Synthesis and Applications
- Molecular Sensors and Ion Detection
- Coordination Chemistry and Organometallics
- Chemical Synthesis and Reactions
- Synthesis and characterization of novel inorganic/organometallic compounds
- Analytical Chemistry and Sensors
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Asymmetric Hydrogenation and Catalysis
- Luminescence and Fluorescent Materials
- Organoboron and organosilicon chemistry
- Polyoxometalates: Synthesis and Applications
- Metal complexes synthesis and properties
- Electrochemical Analysis and Applications
- Advanced NMR Techniques and Applications
- Catalytic C–H Functionalization Methods
- Carbon dioxide utilization in catalysis
- Covalent Organic Framework Applications
- Magnetism in coordination complexes
- Carbon and Quantum Dots Applications
- Inorganic and Organometallic Chemistry
- Crystal structures of chemical compounds
- Catalytic Cross-Coupling Reactions
- Multicomponent Synthesis of Heterocycles
- Chemical Synthesis and Characterization
- Cyclopropane Reaction Mechanisms
National Institute of Technology Delhi
2019-2024
M.J.P. Rohilkhand University
2017
University of Göttingen
2012-2016
University of Delhi
2008-2011
Laboratoire de Biochimie
2010
Cationic and anionic species of heavier low-valent group 14 elements are intriguing targets in main chemistry due to their synthetic potential industrial applications. In the present study, we describe synthesis cationic (MCl+) (MCl3–) germanium(II) tin(II) by using substituted Schiff base 2,6-diacetylpyridinebis(2,6-diisopropylanil) as Lewis (LB). Treatment LB with 2 equiv GeCl2·dioxane SnCl2 toluene gives compounds [(LB)GeIICl]+[GeIICl3]− (1) [(LB)SnIICl]+[SnIICl3]− (2), respectively,...
Metal ions with radical centers in their coordination sphere are key participants biological and catalytic processes. In the present study, we describe synthesis of cAAC:ZnCl2 adduct (1) using a cyclic alkylaminocarbene (cAAC) as donor ligand. Compound 1 was treated 2 equiv KC8 LiB(sec-Bu)3H to yield deep blue-colored dicarbene zinc compound (cAAC)2Zn (2) colorless hydrogenated (cAACH)2Zn (3), respectively. Compounds 3 were well characterized by spectroscopic methods single-crystal X-ray...
Chemoselective behavior of iodine in different solvents the electrophilic iodocyclization o-alkynyl aldehydes is described. o-Alkynyl 3a−t on reaction with I2 CH2Cl2 appropriate nucleophiles provides pyrano[4,3-b]quinolines 4a−f, via formation cyclic iodonium intermediate Q; however, using alcohols as a solvent well nucleophile, esters 5a−y were obtained selectively good to excellent yields hypoiodide R. Subsequently, converted pyranoquinolinones 6a−i and isocoumarin 6j by iodocyclization....
Two different synthetic methodologies of silicon dihalide bridged biradicals the general formula (Ln•)2SiX2 (n = 1, 2) have been developed. First, metathesis reaction between NHC:SiX2 and Ln: (Ln: cyclic akyl(amino) carbene in a 1:3 molar ratio leads to products 2 X Cl), 4 2, 6 Br), 7 Br). These reactions also produce coupled NHCs (3, 5) under C–C bond formation. The formation (Lm alkyl(amino) substituted N-heterocyclic carbene; m 3, n 1 (3) 4, =2 (5)) is faster during NHC:SiBr2 when...
Dialkylamino compounds of group 14 elements (Si, Ge, Sn) in the +2 oxidation state supported by benzamidinate ligands were synthesized and treated with pentafluoropyridine. Two different modes reactivity observed, depending on metal atom basicity substituent at metal. Pentafluoropyridine undergoes oxidative addition reaction Si(II) Ge(II) atoms whereas Sn(II) substitution NMe2 para fluorine pentafluoropyridine occurs. The C–F bond activation lone pair germanium is first report this kind....
Two {Co(3+)-Zn(2+)} heterobimetallic coordination networks have been synthesized utilizing Co(3+) complex as the building blocks. The structural studies reveal 2D sheet-like where containing blocks are connected through Zn(2+) ions. different generate two unique evidenced by crystallographic and other properties. These shown to catalyze Lewis metal ion assisted Strecker reaction in heterogeneous manner.
Abstract Two {Co 3+ –Eu } and –Tb heterodimetallic coordination polymers have been synthesized by using a Co ‐based complex as the building block. Structural studies show that lanthanide atoms are coordinated to cobalt through O amide groups. This results in generation of one‐dimensional zigzag polymer. These shown catalyze ring‐opening reactions epoxides with anilines alcohols under heterogeneous solvent‐free conditions. Interestingly, perfect regioselectivity was observed aminolysis...
We report the synthesis and structural characterization of two-dimensional {Co(3+)-Zn(2+)} {Co(3+)-Cd(2+)} heterobimetallic networks their catalytic applications in heterogeneous solvent-free ring opening reactions various epoxides.
Abstract The present work demonstrates the synthesis and characterization of {Cu + –Co 3+ –Cu } –Fe heterobimetallic complexes utilizing Co Fe coordination as building blocks. crystallographic investigation heterometallic reveal that Cu I ions in clefts are coordinated by two pyridine nitrogen atoms one CH 3 CN molecule. crystal structures also show several weak interactions result interesting packing solid state. accessible 2+/+ redox potential presence labile site on copper center has been...
Oxidation reactions of stable chalcogenamides with iodine are intriguing due to their broad application in various organic syntheses. In the present study we report on utilization N-heterocyclic carbene and cyclic-alkyl-amino carbenes L(1-3): (L(1): = :C[N(2,6-iPr2-C6H3)CH]2, L(2): :C(CH2)(CMe2)(C6H10)N-2,6-iPr2-C6H3, L(3): :C(CH2)(CMe2)2N-2,6-iPr2-C6H3) for syntheses L(1-3)=E (E S, Se, Te) 1-4 zwitterionic adducts L(1-3)=E-I-I 5-8. The synthesis compounds involved addition reaction ligand...
An abnormal N-heterocyclic carbene (aNHC) has been used as a Lewis base to initiate dismutation of trichlorosilane. This report presents the reactivity differences normal (NHC) versus aNHC with heavier group 14 elements. Three novel compounds (NHC)(2)·SiCl(2)H(2) (2), aNHC·SiCl(2)H(2) (3), and aNHC·GeCl(2) (4) have synthesized characterized by single crystal X-ray analysis, solid-state NMR DFT calculations.
The chemistry of stable metalylenes (the heavier group 14 element analogues carbenes) is an intriguing target main due to their synthetic potential and industrial application. In the present study, we report on utilization abnormal N-heterocyclic carbene (aNHC) a cyclic alkyl-amino (cAAC) as Lewis base for syntheses compounds aNHC·SiCl2 (3), aNHC·SnCl2 (4), cAAC·SnCl2 (5). synthesis silylene 3 involved ligand-substitution reaction between NHC·SiCl2 aNHC. However, 4 5 were synthesized by...
The benefits of the ultrafast magic-angle spinning (MAS) approach for acquisition ultrawide-line NMR spectra-spectral simplification, increased mass sensitivity allowing fast study small amounts material, efficient excitation, and application to multiple heavy nuclei-are demonstrated tin(II) oxide (SnO) tin complex [(LB)Sn(II) Cl](+) [Sn(II) Cl3 ](-) [LB=2,6-diacetylpyridinebis(2,6-diisopropylanil)] containing two distinct environments. MAS experiments provide optimal conditions extraction...
An unusual tryptophan coordination mode with copper( ii ) wherein l -tryp is coordinated through the carboxylate and amine groups. A heterogeneous catalyst for Suzuki cross-coupling reaction ∼98% yield under normal conditions.
Two novel malonyl-based chemosensors, N,N'-bis(ethyl-4'-benzoate)-1,3-propanediamide (1) and N,N'-bis(ethyl-3'-benzoate)-1,3-propanediamide (2), have been synthesized screened towards various biologically important metal ions such as Na+, Mg2+, K+, Ca2+, Al3+, Cr3+, Mn2+, Fe2+, Fe3+, Co2+, Ni2+, Cu2+, Zn2+, Ag+, Cd2+, Hg2+, Ti3+, Pb2+. The emission spectral studies of both 1 2 displayed 84 - 91% turn-off responses selectively with Fe3+ ion in aqueous buffer (MeCN/H2O, 1:4, v/v, pH = 7.4)...