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Optimizing analytical precision in the identification of synthetic cathinones and isomers: a comparative assessment of diverse GC–MS operating parameters
Analyzing new psychoactive substances (NPSs) in forensic laboratories present a formidable challenge globally. Within illicit drug analysis, gas...
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Constitutional Isomers
Constitutional isomers have the same molecular formula, but differ in the arrangement of the atoms in the respective molecule. This means that the...
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Yerba Mate as an Inexpensive Source of Analytical Standards of Chlorogenic Acid Isomers: an Optimization Study
Chlorogenic acid isomers have been increasingly studied because of their beneficial biological effects in humans. However, their commercial...
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STRUCTURAL ISOMERS AND VIBRATIONAL SPECTRUM OF TETRAFLUOROSUBSTITUTED ZINC PHTHALOCYANINE
AbstractStructural parameters and relative Gibbs free energies are calculated by density functional theory methods for four tetrafluoro derivatives...
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Enumeration of constitutional isomers of methyl alkanes by means of alkyl biradicals: equivalence of odd and even isomer series of symmetrical methyl alkanes
A mathematical–chemical approach using alkyl biradicals has been used to enumerate isomers of alkenes, alkylcyclopropanes, and alkyl triradicals for...
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Conformation Isomers
Chemical bonds are not rigid and should therefore not be considered as such. A rotation around single bonds is possible and leads to different...
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Directed regulation mechanism on chlorine substitution of PCDD/Fs isomers based on quantum chemical computation
BackgroundChlorine substitution has been considered as one of the key steps of polychlorinated dibenzodioxin/furan (PCDD/Fs) generation. The...
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Molecular insights into the complex formation between dodecamethylcucurbit[6]uril and phenylenediamine isomers
The complexation behavior of diprotonated phenylenediamine isomers with decamethylene cucurbit[6]uril (Me 12 Q[6]) in 1:1 and 1:2 stoichiometry was...
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Configuration Isomers: Geometric Isomerism
Geometric isomers differ in the spatial arrangement of substituents on a double bond or non-aromatic ring system. Especially in the case of...
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Intramolecular interactions (O-H∙∙∙O, C-H∙∙∙N, N-H∙∙∙π) in isomers of neutral, cation, and anion dopamine molecules: A DFT study on the influence of solvents (water and ethanol)
ContextDopamine (DA) is one of the most important neurotransmitters associated with numerous neural disorders. This investigation reports the...
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Influence of air exposure on structural isomers of silver nanoparticles
Up to date, the influence of ambient air exposure on the energetics and stability of silver clusters has rarely been investigated and compared to...
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Employing supramolecular chemistry strategies for the separation of mixtures of anisole and bromoanisole isomers
In the present work, host compounds trans -9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboxylate ( H1 ), trans -α,α,α’,α’-tetraphenyl-9,10-dihydro-9,10-e...
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Configuration Isomers: Optical Isomerism
In this chapter, you will learn about chirality. See how you can convert the Fischer projection into a wedge formula and how the D-/L-configuration...
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The Facial and Short Method for the Synthesis of Z/E-Isomers of Acetate of 12-Tetradecene-1-ol Components of the Sex Pheromone Ostrinia furnacalis
The sex pheromones of Ostrinia furnacalis Z / E -isomers of acetate of 12-tetradecene-1-ol were synthesized in an overall yield of 44.5% with...
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Erratum to: Sorption and Gas Transport Characteristics of Polyimides Based on a Mixture of Diethyl Toluene Diamine Isomers
An Erratum to this paper has been published: https://doi.org/10.1134/S2517751622090013
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Analyses of chemiluminescence reactions of fluorophore-linked 1,2-dioxetane isomers in crystals heating at elevated temperature including a development of a simultaneous measurement method of thermal diffusivity and light emission for a single crystal
It has been found that a fluorophore-linked adamantylideneadamantane 1,2-dioxetane derivative showed an isomeric difference in the reactivities of...
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Green synthesis of nitrotoluene isomers over Nb2O5/SiO2 and MoO3/SiO2 nanocatalysts
Niobium pentoxide (Nb 2 O 5 ) and molybdenum trioxide (MoO 3 ) supported on silica (SiO 2 ) nanocatalysts are synthesized and characterized by...
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Simultaneous electrochemical sensing of dihydroxy benzene isomers at cost-effective allura red polymeric film modified glassy carbon electrode
BackgroundA simple and simultaneous electrochemical sensing platform was fabricated by electropolymerization of allura red on glassy carbon electrode...
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Evaluation of suitable mixture proportion compatibility of aviation fuel JET A-1 blended with butanol isomers
This study focuses on the compatibility and thermal reactivity of blends of aviation kerosene JET A-1 with four kinds of butanol. This prospective...
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Configuration Isomers: Sugar
Sugars are among the most important carbohydrates. At this chapter, you will learn what anomers are and in what many different ways (e.g., Fischer...