Cyclic vs Acyclic Alkyne towards Hg2+ ion detection: A Combined Experimental and Theoretical Studies

2022 ◽  
Author(s):  
Arunabha Thakur ◽  
Adwitiya Pal ◽  
Bappaditya Goswami
Keyword(s):  
Functional Groups ◽  
Organic Synthesis ◽  
Theoretical Studies ◽  
Ion Detection ◽  
Experimental And Theoretical Studies

Alkynes constitute a versatile class of functional groups, which can potentially undergo a variety of transformations in organic synthesis. The interaction between alkyne unit and Hg2+ ion is well-known since...

scholarly journals N-Heterocyclic Carbene Mediated Organocatalysis Reactions

2021 ◽  
Author(s):  
Yatheesh Narayana ◽  
Sandhya N. C. ◽  
H.E. Dinesh ◽  
Sridhar B. Thimmaiah ◽  
Kanchugarakoppal S. Rangappa ◽  
...  
Keyword(s):  
Transition Metals ◽  
Carbonyl Group ◽  
Organic Synthesis ◽  
Practical Significance ◽  
Theoretical Studies ◽  
Carbonyl Carbon ◽  
Main Group Elements ◽  
Catalyzed Reactions ◽  
Electrophilic Character ◽  
Experimental And Theoretical Studies

Arduengo et al., isolated the first ‘bottleable’ carbene, the first N-heterocyclic carbene (NHC) 1,3-di(adamantyl)imidazol-2-ylidene resulted to an explosion of experimental and theoretical studies of novel NHCs being synthesized and analyzed have huge practical significance. These compounds emerged as successful ligands for coordinating transition metals, the complexes with NHC show diverse applications in the field of catalysis and organic transformation, NHC as ligand to main group elements and their properties and applications. Here this chapter provides the concise overview of N-heterocycle carbene as an organocatalyst that provides different organic transformation on to a carbonyl group. The majority of the NHC catalyzed reactions are employed in the phenomenon of reversing the electrophilic character of carbonyl carbon to nucleophilic carbon (umpolung activity) on coordination suggests benzoin, Stetter and hydroacylation reactions. Also, non-umpolung activity of bis-electrophile α,β-unsaturated acylazoliums reaction with suitable bis-nucleophiles in the organic synthesis have been studied.

A dramatic conformational effect of multifunctional zwitterions on zeolite crystallization

2020 ◽  
Vol 56 (93) ◽  
pp. 14693-14696
Author(s):  
Lei Dong ◽  
Dong Zhai ◽  
Zhuwen Chen ◽  
Guangchao Zheng ◽  
Yanding Wang ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Functional Groups ◽  
Molecular Conformation ◽  
Zeolite Synthesis ◽  
Theoretical Studies ◽  
Remarkable Effect ◽  
Conformational Effect ◽  
Lta Zeolite ◽  
Organic Functional Groups ◽  
Experimental And Theoretical Studies

Carnitine functions as a mesoporogen in LTA zeolite synthesis whereas acetylcarnitine acts as a crystal growth modifier. Experimental and theoretical studies reveal a remarkable effect of molecular conformation on the roles of organic functional groups during zeolite crystallization.

The Stabilizing Effect of Pre-Equilibria: A Trifluoromethyl Complex as CF2 Reservoir in Catalytic Olefin Difluorocarbenation

2020 ◽  
Author(s):  
Thomas Louis-Goff ◽  
Huu Vinh Trinh ◽  
Eileen Chen ◽  
Arnold L. Rheingold ◽  
Christian Ehm ◽  
...  
Keyword(s):  
High Selectivity ◽  
Side Reactions ◽  
Theoretical Studies ◽  
Attractive Feature ◽  
Catalyst Recovery ◽  
Wide Range ◽  
Stabilizing Effect ◽  
Experimental And Theoretical Studies

A new, efficient, catalytic difluorocarbenation of olefins to give 1,1-difluorocyclopropanes is presented. The catalyst, an organobismuth complex, uses TMSCF<sub>3</sub> as a stoichiometric difluorocarbene source. We demonstrate both the viability and robustness of this reaction over a wide range of alkenes and alkynes, including electron-poor alkenes, to generate the corresponding 1,1-difluorocyclopropanes and 1,1-difluorocyclopropenes. Ease of catalyst recovery from the reaction mixture is another attractive feature of this method. In depth experimental and theoretical studies showed that the key difluorocarbene-generating step proceeds through a bismuth non-redox synchronous mechanism generating a highly reactive free CF<sub>2</sub> in an endergonic pre-equilibrium. It is the reversibility when generating the difluorocarbene that accounts for the high selectivity, while minimizing CF<sub>2</sub>-recombination side-reactions.

Strong coupling: resonant effects

2017 ◽  
Author(s):  
Alexey V. Kavokin ◽  
Jeremy J. Baumberg ◽  
Guillaume Malpuech ◽  
Fabrice P. Laussy
Keyword(s):  
Strong Coupling ◽  
Experimental Studies ◽  
Strong Coupling Regime ◽  
Theoretical Studies ◽  
Stimulated Scattering ◽  
Quantum Theories ◽  
Pump Probe ◽  
Exciton Polaritons ◽  
Linear Optical Properties ◽  
Experimental And Theoretical Studies

This chapter presents experimental studies performed on planar semiconductor microcavities in the strong-coupling regime. The first section reviews linear experiments performed in the 1990s that evidence the linear optical properties of cavity exciton-polaritons. The chapter is then focused on experimental and theoretical studies of resonantly excited microcavity emission. We mainly describe experimental configuations in which stimulated scattering was observed due to formation of a dynamical condensate of polaritons. Pump-probe and cw experiments are described in addition. Dressing of the polariton dispersion and bistability of the polariton system due to inter-condensate interactions are discussed. The semiclassical and the quantum theories of these effects are presented and their results analysed. The potential for realization of devices is also discussed.

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