Results 281 to 290 of about 853,691 (310)

Ring Transformations in Tetrazole Chemistry

Journal f�r Praktische Chemie/Chemiker-Zeitung, 1998
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Chemistry of Pnictogen(III)—Nitrogen Ring Systems

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
BALAKRISHNA, MS, EISLER, DJ, CHIVERS, T
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Ring expansion reactions in organonickel chemistry

Journal of the Chemical Society D: Chemical Communications, 1970
In contrast with the reactions of NiL4(L = tertiary phosphine), Ni(ButNC)4 reacts with (CF3)2CO and (CF3)2CNH to give five-membered-ring compounds (ButNC)2[graphic omitted](X = O or NH) in an almost stereoselective 3- to 5-ring transformation.
M. Green, A. Greco, S. K. Shakshooki, F. G. A. Stone   +3 more
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Cyclopentadienyl ring activation in organometallic chemistry and catalysis

Nature Reviews Chemistry, 2023
The cyclopentadienyl (Cp) ligand is a cornerstone of modern organometallic chemistry. Since the discovery of ferrocene, the Cp ligand and its various derivatives have become foundational motifs in catalysis, medicine and materials science. Although largely considered an ancillary ligand for altering the stereoelectronic properties of transition metal ...
Andrew VanderWeide, Demyan E. Prokopchuk
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ChemInform Abstract: New Advances in the Chemistry of the Phosphirene Ring.

ChemInform, 1987
Abstract Some recent developments of the chemistry of phos-phirenes are reviewed. They include two new syntheses of the ring, a preliminary investigation on the reactivity of 1-chlorophosphirenes and various ring expansions.
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The chemistry of selective ring-opening catalysts

Applied Catalysis A: General, 2005
Abstract Bitumen-derived crude and heavy oils require severe processing and produce middle distillate product with poor ignition quality. This becomes a concern to refiners as tighter specifications on transportation fuel are promulgated. One process to address this issue is selective ring opening of cycloparaffins to reduce the number of ring ...
Zbigniew Ring, Hong Yang, Craig Fairbridge, Hong-Bin Du   +3 more
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The chemistry of small ring compounds—XIV

Tetrahedron, 1972
Abstract The hydrogen isotope exchange rates of α-deuterio- and α-tritiocyclopropanes with electronwithdrawing substituents and the corresponding open 2-substituted propanes have been measured in solutions of sodium methoxide in methanol. Substituents fall in two classes: CF3, CN and ∅SO2 make the α-hydrogen in cyclopropanes more acidic than in the ...
H. Steinberg, W. Th. van Wijnen, Th. J. de Boer   +2 more
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ChemInform Abstract: Rings, Radicals, and Synthetic Metals: The Chemistry of SNS+ [PDF]

ChemInform, 1994
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Simon Parsons, Jack Passmore
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A Janus cyclohexane ring

Nature Chemistry, 2015
The first synthesis of the all-cis isomer of 1,2,3,4,5,6-hexafluorocyclohexane, a molecule with one hydrocarbon face and one fluorocarbon face, is a tour de force of organofluorine chemistry and opens up new possibilities for molecular design.
Ryan Gilmour, Nico Santschi
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Chemistry and pharmacology of ring-fluorinated catecholamines

Journal of Fluorine Chemistry, 1995
Abstract Naturally-occurring catecholamines have important and diverse physiological roles, including serving as chemical neurotransmitters. The responses of catecholamines functioning as adrenergic agonists can be profoundly altered by ring fluorination, depending on the site of fluorination and the nature of the agonist.
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