Results 31 to 40 of about 132,796 (171)
A Search for Alternative Solid Rocket Propellant Oxidizers [PDF]
arXiv, 2022 Carbon-based caged and heterocyclic compounds tend to have strained molecular structures leading to high heats of formation and energetic behavior. In the current paper, molecular modelling calculations for 10 caged compounds of this type along with 2 strained aliphatic compounds and 4 simple cyclic chains are presented in view of their possible use as
arxiv
Towards a Molecular Level Understanding of the Sulfanilamide-Soil Organic Matter-Interaction [PDF]
Science of the Total Environment 559, 347 (2016), 2016 In-depth understanding of the sorption mechanisms of organic pollutants, like the antibiotic sulfanilamide (SAA), in soil requires a combined experimental and theoretical approach. Therefore, sorption experiments of SAA on well-characterized samples of soil size-fractions were combined with the modeling of SAA-soil-interaction via quantum chemical ...
arxiv +1 more source
A Search for Heterocycles in GOTHAM Observations of TMC-1 [PDF]
, 2022 We have conducted an extensive search for nitrogen-, oxygen- and sulfur-bearing heterocycles toward Taurus Molecular Cloud 1 (TMC-1) using the deep, broadband centimeter-wavelength spectral line survey of the region from the GOTHAM large project on the Green Bank Telescope.
arxiv +1 more source
Enumeration of saturated and unsaturated substituted N-heterocycles [PDF]
arXiv, 2023 Mathematical and computational approaches in chemistry and biochemistry fill a gap in respect to the analysis of the physicochemical features of compounds and their functionality and provide an overview of known as well as yet unknown, but hypothetically possible structures.
arxiv
Heterocyclic Chemistry at a Glance
, 2007 1. Heterocyclic Nomenclature. 2. Structures of Heteroaromatic Compounds. 3. Common reaction types in heterocyclic chemistry. 4. Pyridines. 5. Quinolines and Isoquinolines. 6. Diazines. 7. Pyryliums and benzopyryliums. 8. Pyrroles. 9. Indoles. 10.
J. Joule, K. Mills
semanticscholar +1 more source
Crystal structures of two 6-(2-hydroxybenzoyl)-5H-thiazolo[3,2-a]pyrimidin-5-ones
Acta Crystallographica Section E: Crystallographic Communications, 2015 The title compounds, 6-(2-hydroxybenzyl)-5H-thiazolo[3,2-a]pyrimidin-5-one, C13H8N2O3S, (1), and 6-(2-hydroxybenzyl)-3-methyl-5H-thiazolo[3,2-a]pyrimidin-5-one, C14H10N2O3S, (2), were synthesized when a chromone-3-carboxylic acid, activated with ...
Ligia R. Gomes +3 more
doaj +1 more source
Zanco Journal of Pure and Applied Sciences, 2020 The present study deals with the synthesis, spectroscopic characterization, antibacterial and antifungal activities of novel series five-membered ring heterocyclic compounds containing nitrogen and sulfur heteroatoms.
Trifa Khalaf Mohammed +2 more
doaj +3 more sources
The discovery of dinotefuran: a novel neonicotinoid.
Pest Management Science, 2003 Dinotefuran (MTI-446: (RS)-1-methyl-2-nitro-3-(tetrahydro-3-furylmethyl)guanidine) is a new neonicotinoid commercialized by Mitsui Chemicals. Research led to this novel neonicotinoid by the removal of the chloropyridine or chlorothiazole ring that had ...
Takeo Wakita +9 more
semanticscholar +1 more source
Acta Chimica Slovenica, 2020 l,3-Dithiin with two sulfurs in its structure is a six-membered, sulfur-containing heterocyclic compound. New derivatives of 6'-amino-2'-(arylidene)spiro[indeno[1,2-b]quinoxaline[1,3]dithiine]-5'-carbonitrile were prepared by the multi-component reaction
Mohammadreza Moghaddam-Manesh +3 more
doaj +1 more source
Synthesis and Biological Evaluation of Novel 5,7-Dichloro-1,3-benzoxazole Derivatives
Journal of Chemistry, 2013 A new class of 5,7-dichloro-1,3-benzoxazole derivatives 4–11 were synthesized by fusing 5,7-dichloro-2-hydrazino-1,3-benzoxazole 3 nucleus with aliphatic acids, active methylene compounds, and with selected esters to form heterocyclic ring systems like 1,
N. D. Jayanna +5 more
doaj +1 more source