Prof. Elena Tupikina

Prof. Elena Tupikina

Saint Petersburg University
Hydrogen-Bond-Assisted Configurational Diversity of Benzamidines: Experimental and Theoretical Study featured image

Hydrogen-Bond-Assisted Configurational Diversity of Benzamidines: Experimental and Theoretical Study

Configurational diversity and mechanisms of prototropic tautomerism of 15 N,N’-diarylbenzamidines as potential building blocks in H-bonded polymeric materials are investigated. …

edem-r.-chakalov
A data-driven and quantum chemistry-anchored framework for modeling and classifying carbon–lithium bonding in organolithium aggregates featured image

A data-driven and quantum chemistry-anchored framework for modeling and classifying carbon–lithium bonding in organolithium aggregates

We present a quantum chemistry-based, data-driven framework for the automated classification of carbon–lithium bonding motifs in archetypal organolithium aggregates. Starting from …

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Valerii Verkhov
Hydrogen-bond-assisted Chalcogen Transfer Between Phosphine Selenides and Arsine Oxides featured image

Hydrogen-bond-assisted Chalcogen Transfer Between Phosphine Selenides and Arsine Oxides

The Brønsted acid catalysis is widely regarded as one of the most effective methods for activating inert substrates and enabling unique reactivity. In this work, we introduce the …

d.-v.-krutin
Flipping the Metalation of 4-Dimethylaminopyridine: Steric Repulsion versus London Dispersion Attraction featured image

Flipping the Metalation of 4-Dimethylaminopyridine: Steric Repulsion versus London Dispersion Attraction

It has been shown that azomethines, hydrazones, and oximes derived from 2(7)-carbonyl derivatives of 1,8-bis(dimethylamino)naphthalene can undergo acid-catalyzed heterocyclization …

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Valerii Verkhov
Phosphine Selenides: Versatile NMR Probes for Analyzing Hydrogen OH···Se and Halogen I···Se Bonds featured image

Phosphine Selenides: Versatile NMR Probes for Analyzing Hydrogen OH···Se and Halogen I···Se Bonds

Nuclear magnetic resonance (NMR) spectroscopy is a powerful tool for studying the structure and dynamics of various non-covalent interactions. However, often spectral parameters …

a.-s.-zakharov
Chiral Diselenophosphoric Acids for Ion Pair Catalysis: A Novel Approach to Enhance Both Proton Donating and Proton Accepting Properties featured image

Chiral Diselenophosphoric Acids for Ion Pair Catalysis: A Novel Approach to Enhance Both Proton Donating and Proton Accepting Properties

The activation of poorly reactive substrates via strong chiral acids is a central topic in asymmetric ion pair catalysis these days. Despite highly successful scaffolds such as …

j.-eder
NMR detection of the strained metallacycles in organolithiums: theoretical study featured image

NMR detection of the strained metallacycles in organolithiums: theoretical study

For the first time through quantum chemistry methods, the effective use of 1JCLi spin–spin coupling constants as descriptors for assessing the formation of strained metallacycles …

m.-v.-kaplanskiy
«Buttressing Effect» in the Halogen-Lithium Exchange in ortho-Bromo-N,N-dimethylanilines and Related Naphthalenes featured image

«Buttressing Effect» in the Halogen-Lithium Exchange in ortho-Bromo-N,N-dimethylanilines and Related Naphthalenes

Non-covalent interactions such as coordination of an organolithium reagent by a directing group and steric repulsion of substituents strongly affect the halogen-lithium exchange …

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Stepan Meshalkin
The role of conjugation in the halogen-lithium exchange: lithiation of 4,6,7,9-tetrabromo-1,3-dimethyl-2,3-dihydro-1H-perimidine featured image

The role of conjugation in the halogen-lithium exchange: lithiation of 4,6,7,9-tetrabromo-1,3-dimethyl-2,3-dihydro-1H-perimidine

The first case of successful suppression of the coordination of a lithium atom with a dialkylamino group by the effective conjugation of the latter with the aromatic core has been …

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Artyom Yakubenko
Spontaneous Cyclization of peri-Diiminonaphthalenes Leading to the Formation of Benzo[de]isoquinolines and Stable Benzo[de]isoquinoliniums featured image

Spontaneous Cyclization of peri-Diiminonaphthalenes Leading to the Formation of Benzo[de]isoquinolines and Stable Benzo[de]isoquinoliniums

The interaction of peri-dilithionaphthalenes with organic cyanides was studied. Instead of the expected peri-diimines, the reaction leads to the formation of three types of …

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Dmitrii Tolochenko