V
Venkatachalam Ramkumar
Researcher at Indian Institute of Technology Madras
Publications - 178
Citations - 2743
Venkatachalam Ramkumar is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Polymerization & Ring-opening polymerization. The author has an hindex of 27, co-authored 175 publications receiving 2380 citations. Previous affiliations of Venkatachalam Ramkumar include University of the West Indies & Indian Institutes of Technology.
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Synthesis and Structure of 1,4-Diphenyl-3-methyl-1,2,3-triazol-5-ylidene Palladium Complexes and Application in Catalytic Hydroarylation of Alkynes
TL;DR: In this article, a mesoionic N-heterocyclic carbene (NHC) consisting of 1,4-diphenyl-3-methyl-1,2,3-triazol-5-ylidene (Tz) was used as a catalyst for the stereoselective hydroarylation of alkynes.
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Effect of interlayer anions on the physicochemical properties of zinc–aluminium hydrotalcite-like compounds
TL;DR: In this article, the physicochemical properties of ZnAlAn-like compounds were studied using powder X-ray diffraction (PXRD), infrared (IR) and laser Raman (LR) spectra, thermogravimetry (TG), differential scanning calorimetry, evolved gas analysis (EGA), 27Al MAS NMR, and pore-size determination.
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Efficient and versatile catalysis of N-alkylation of heterocyclic amines with alcohols and one-pot synthesis of 2-aryl substituted benzazoles with newly designed ruthenium(II) complexes of PNS thiosemicarbazones.
Rangasamy Ramachandran,Govindan Prakash,Sellappan Selvamurugan,Periasamy Viswanathamurthi,Jan Grzegorz Małecki,Venkatachalam Ramkumar +5 more
TL;DR: Ruthenium(II) carbonyl complexes with phosphine-functionalized PNS type thiosemicarbazone ligands have been synthesized and characterized by elemental analysis and spectroscopy and found to be a very efficient and versatile catalyst towards N-alkylation of a wide range of heterocyclic amines with alcohols.
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Boron Beyond the Icosahedral Barrier: A 16‐Vertex Metallaborane
Dipak Kumar Roy,Shubhankar Kumar Bose,R. S. Anju,Bijan Mondal,Venkatachalam Ramkumar,Sundargopal Ghosh +5 more
TL;DR: A neutral metallaborane comprising a Rh4B12 polyhedron with icosioctahedron geometry with 16 vertices and 28 triangular faces was prepared.
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Fine tuning of metallaborane geometries: chemistry of metallaboranes of early transition metals derived from metal halides and monoborane reagents.
Shubhankar Kumar Bose,K. Geetharani,Venkatachalam Ramkumar,Shaikh M. Mobin,Sundargopal Ghosh +4 more
TL;DR: All these new metallaboranes have been characterized by mass, (1)H, (11)B, and (13)C NMR spectroscopy and elemental analysis and the structural types were established unequivocally by crystallographic analysis of 1-4.