four-membered


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Adj.1.four-membered - of a chemical compound having a ring with four membersfour-membered - of a chemical compound having a ring with four members
membered - having members; normally used in chemistry in combination with a number
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He was selected for the award after competing with two Indian Surgical Teams in the final presentation for 20 minutes in front of a four-membered jury comprising the members of the editorial board of the BMJ.
The four-membered MAMAMOO's sixth mini-album will be titled "Yellow Flower." This week, their agency released teaser images of the tentatively titled track song "Starry Night."
IM1 and IM2 can transform mutually through a four-membered ring transition state TS5 (-6.1kcal/mol).
According to Phys.org, at a macromolecular scale, melanin's structure includes, "a four-membered ring--a chemical structure that may be conducive to creating certain kinds of batteries based on natural melanin pigments." Melanin's primary functions inside the body are to absorb ultraviolet light and capture toxic ions.
Phenylenes are a class of conjugated hydrocarbons composed of six- and four-membered rings, where the six-membered rings (hexagons) are adjacent only to four-membered rings, and every four-membered ring is adjacent to a pair of hexagons.
That strength of Penicillin is its molecular core, a cyclic four-membered amide ring termed a beta-lactam.
Four-membered ring complex, IN3, (see Figure 1) undergoes elongation of [O.sub.3]-S bond and collapse of four-membered ring structure turn to IN4 after entrancing TS4 with the energy barrier of 11.892 kcal/mol and imaginary frequency of 152i [cm.sup.-1].
The 14 chapters of part one discuss topics such as the physical properties and theoretical studies of cyclobutane; antiaromaticity and aromaticity in carbocyclic four-membered rings; thermochemistry of cyclobutane and its derivatives; NMR (nuclear magnetic resonance) spectroscopy of cyclobutanes; conformation and configuration as stereochemical aspects of cyclobutane; synthesis of cyclobutanes; the application of cyclobutane derivatives in organic synthesis; structural effects of the cyclobutyl group on reactivity and properties; cation radicals in the synthesis and reactions of cyclobutanes; and highly unsaturated cyclobutane derivatives.