Articles with "three membered" as a keyword



Influence of heteroelement on dipole and quadrupole moments of a series of three-membered rings containing a second, third, fourth, or fifth-row atom: a theoretical investigation

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Published in 2018 at "Structural Chemistry"

DOI: 10.1007/s11224-018-1190-5

Abstract: The influence of heteroelements on the molecular dipole and traceless quadrupole moments of a series of twenty-two three-membered rings (1–22) was theoretically estimated employing levels of theory such as MP2, CCSD, and PBE1PBE in combination… read more here.

Keywords: membered rings; rings containing; quadrupole moments; moments series ... See more keywords

Ring Strain Energies of Three-Membered Homoatomic Inorganic Rings El3 and Diheterotetreliranes El2Tt (Tt = C, Si, Ge): Accurate versus Additive Approaches

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Published in 2022 at "Inorganic Chemistry"

DOI: 10.1021/acs.inorgchem.2c01777

Abstract: Accurate ring strain energies (RSEs) for three-membered symmetric inorganic rings El3 and organic dihetero-monocycles El2C and their silicon El2Si and germanium El2Ge analogues have been computed for group 14–16 “El” heteroatoms using appropriate homodesmotic reactions… read more here.

Keywords: rings el3; strain energies; inorganic rings; three membered ... See more keywords

Unravelling the Strain: Accurate Ring Strain Energies in Chalcogeniranes and Predictive Models for Most p‑Block Three-Membered Rings

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Published in 2025 at "Inorganic Chemistry"

DOI: 10.1021/acs.inorgchem.5c01736

Abstract: State-of-the-art single reference computational methods were utilized to accurately determine the ring strain energy (RSE) for all three-membered rings (3MRs) containing the El 2 Ch core, where Ch is a chalcogen atom and El is… read more here.

Keywords: strain accurate; unravelling strain; ring strain; strain ... See more keywords

Geometric and Electronic Structure Analysis of the Three-Membered Electron-Transfer Series [(μ-CNR)2[CpCo]2]n (n = 0, 1–, 2−) and Its Relevance to the Classical Bridging-Carbonyl System

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Published in 2017 at "Organometallics"

DOI: 10.1021/acs.organomet.7b00164

Abstract: The dimeric bridging carbonyl complexes [(μ-CO)2[CpCo]2]n (n = 0, 1−) have occupied a central position in the understanding of metal–metal bonding interactions when bridging ligands are present. Based on simple electron-counting formalisms, these dimers have… read more here.

Keywords: system; series; three membered; bridging carbonyl ... See more keywords

Palladium-Catalyzed Synthesis of Functionalized Indoles by Acylation/Allylation of 2-Alkynylanilines with Three-Membered Rings.

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Published in 2022 at "Organic letters"

DOI: 10.1021/acs.orglett.2c00246

Abstract: Palladium-catalyzed synthesis of 3-acyl and -allyl indoles has been realized by merging nucleophilic cyclization of ortho-alkynylanilines with ring opening of three-membered rings such as cyclopropenones and gem-difluorinated cyclopropanes. These functionalized indoles were obtained in moderate… read more here.

Keywords: functionalized indoles; palladium catalyzed; three membered; membered rings ... See more keywords

Left-Handed Helix of Three-Membered Ring Amino Acid Homopeptide Interrupted by an N-H···Ethereal O-Type Hydrogen Bond.

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Published in 2018 at "Organic letters"

DOI: 10.1021/acs.orglett.8b03331

Abstract: A chiral three-membered ring Cα,α-disubstituted α-amino acid ( R, R)-Ac3cdMOM, in which the α-carbon is not a chiral center, but two side chain β-carbons are chiral centers, was synthesized from dimethyl l-(+)-tartrate, and its homopeptides… read more here.

Keywords: membered ring; amino acid; left handed; hydrogen bond ... See more keywords

A three-membered ring approach to carbonyl olefination

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Published in 2017 at "Nature Communications"

DOI: 10.1038/s41467-017-01036-y

Abstract: The carbon–carbon double bond, with its diverse and multifaceted reactivity, occupies a prominent position in organic synthesis. Although a variety of simple alkenes are readily available, the mild and chemoselective introduction of a unit of… read more here.

Keywords: membered ring; approach carbonyl; olefination; ring approach ... See more keywords

The efficient synthesis of three-membered rings via photo- and electrochemical strategies

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Published in 2024 at "Chemical Science"

DOI: 10.1039/d4sc02512a

Abstract: Three-membered rings, such as epoxides, aziridines, oxaziridines, cyclopropenes, vinyloxaziridines, and azirines, are recognized as crucial pharmacophores and building blocks in organic chemistry and drug discovery. Despite the significant advances in the synthesis of these rings… read more here.

Keywords: photo electrochemical; synthesis three; three membered; efficient synthesis ... See more keywords

Discovery of Three 22-Membered Macrolides by Deciphering the Streamlined Genome of Mangrove-Derived Streptomyces sp. HM190

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Published in 2020 at "Frontiers in Microbiology"

DOI: 10.3389/fmicb.2020.01464

Abstract: Strain HM190, a moderate halophile, was isolated from rhizosphere soil of the mangrove Kandelia obovata in Fugong village, China. The 16S ribosomal RNA (rRNA) gene sequence and the results of phylogenetic analysis revealed that strain… read more here.

Keywords: hm190; discovery three; mangrove; three membered ... See more keywords