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searching for Ring strain 39 found (97 total)

Divinylcyclopropane-cycloheptadiene rearrangement (1,320 words) [view diff] exact match in snippet view article find links to article

advantage of a strong thermodynamic driving force due to the release of ring strain. This thermodynamic power is recently being considered as an alternative

Benson group increment theory (2,008 words) [view diff] exact match in snippet view article find links to article

groups as being individual entities. Furthermore, this leaves error for ring strain, as we will see in its limitations. From this Benson and Buss concluded

Cationic polymerization (2,567 words) [view diff] exact match in snippet view article find links to article

monomer double bond; for heterocycles, this is due to release of monomer ring strain and, in some cases, isomerization of repeating units. Monomers for cationic

Binary ethylenimine (244 words) [view diff] exact match in snippet view article find links to article

least one three-membered ring which is very reactive because of the ring strain. It is used to inactivate the foot-and-mouth disease virus in vaccines

Acyclic diene metathesis (384 words) [view diff] no match in snippet view article find links to article

the release of volatile ethylene gas, ROMP is driven by the relief of ring-strain. While the concept of ADMET had been discussed in the scientific literature

Diaziridine (149 words) [view diff] exact match in snippet view article find links to article

nitrogen atoms of diaziridines are configurationally stable because the ring strain prevents Walden inversion. As a result, there can be various stereoisomeric

Trans-Cyclooctene (737 words) [view diff] no match in snippet view article find links to article

isolated as its trans-isomer. The cis-isomer is much more stable; the ring-strain energies being 16.7 and 7.4 kcal/mol, respectively. A planar arrangement

Click chemistry (5,477 words) [view diff] exact match in snippet view article find links to article

trans-cyclooctene, ring strain release is a driving force for this reaction. Thus, three-membered and four-membered cycloalkenes, due to their high ring strain, make

Bioorthogonal chemistry (5,098 words) [view diff] exact match in snippet view article find links to article

distortion energies. It was proposed that biaryl substitution increases ring strain and provides conjugation with the alkyne to improve reactivity. Although

Aziridinium (221 words) [view diff] exact match in snippet view article find links to article

aziridinium ions. The creation of this ionic species imparts a 47 kJ/mol ring strain increase. Thus, aziridiniums render nonactivated aziridines reactive

Hemiacetal (404 words) [view diff] no match in snippet view article find links to article

electron-withdrawing groups. The cyclopropanone case illustrates the effect of ring-strain. The two cases on the right illustrate the effect of ring-closure.

Α-Ketol rearrangement (1,281 words) [view diff] exact match in snippet view article find links to article

the corresponding starting materials. Starting materials incorporating ring strain, for instance, will rearrange to products lacking strain. (2) When metal

Photoisomerization (784 words) [view diff] exact match in snippet view article find links to article

UV radiation . When converted back to norbornadiene, quadryicyclane’s ring strain energy is liberated in the form of heat (ΔH = −89 kJ/mol). This reaction

Cyclohexane (1,559 words) [view diff] exact match in snippet view article find links to article

the cycloalkanes; as a result cyclohexane has been deemed a 0 in total ring strain. Cyclohexane has two crystalline phases. The high-temperature phase I

1,4-Dioxin (479 words) [view diff] exact match in snippet view article find links to article

Aitken, R. Alan; Cadogan, J. I. G. & Gosneya, Ian (1994). "Effect of ring strain on the formation and pyrolysis of some Diels–Alder adducts of 2-sulfolene

Leukotriene-A4 hydrolase (595 words) [view diff] exact match in snippet view article find links to article

epoxide ring functional group, which are highly reactive due to its ring strain making them extremely electrophilic. This drives the reaction forward

Episulfide (561 words) [view diff] exact match in snippet view article find links to article

as monomers in polymerization reactions. Episulfides have an innate ring strain due to the nature of three-membered rings. Therefore, most reactions

Kedarcidin (2,705 words) [view diff] exact match in snippet view article find links to article

kedarcidin chromophore. Nucleophilic activation is thought to diminish the ring strain incurred by formation of the cycloaromatized product, and thus activate

Ring expansion and contraction (1,704 words) [view diff] exact match in snippet view article find links to article

-bromoalkyl)malonates in the range of 4- to 21-membered rings. Role of ring strain". Journal of the American Chemical Society. 106 (4): 1051–1056. doi:10

Amine (3,533 words) [view diff] exact match in snippet view article find links to article

outermost carbon on the oxirane ring of the epoxy resin. This relieves ring strain on the epoxide and is the driving force of the reaction.[citation needed]

Bomb (3,710 words) [view diff] case mismatch in snippet view article find links to article

Reuters. Archived from the original on 2008-04-19. Retrieved 2008-06-02. "Ring Strain in Cycloalkanes". Orgo Made Simple. Archived from the original on 22

Dysidazirine (154 words) [view diff] exact match in snippet view article find links to article

stops HCT-116 human colon cancer cells from growing. "Despite my high ring strain, I'm pretty stable. What molecule am I?". ACS.org. American Chemical

Living polymerization (4,362 words) [view diff] no match in snippet view article find links to article

reactions involve the conversion of a cyclic olefin with significant ring-strain (>5 kcal/mol), such as cyclobutene, norbornene, cyclopentene, etc., to

Taraxasterol (227 words) [view diff] exact match in snippet view article find links to article

subjected to an alkyl shift to create a six-membered ring and relieving ring strain to form the baccharenyl cation. This allows the baccharenyl double bond

Tiffeneau–Demjanov rearrangement (2,701 words) [view diff] exact match in snippet view article find links to article

and not undergo rearrangement. Five member rings rearrange due to the ring strain encouraging the maneuver. This strain makes the carbocation unstable

Graphane (1,135 words) [view diff] exact match in snippet view article find links to article

structure, including the chair and boat conformers, in order to minimize ring strain and allow for the ideal tetrahedral bond angle of 109.5° for sp3-bonded

Β-Carbon elimination (1,798 words) [view diff] exact match in snippet view article find links to article

late transition metal complexes are either absent of β-hydrogens or use ring strain relief and aromaticity as driving forces to favor β-alkyl elimination

Homoaromaticity (3,769 words) [view diff] exact match in snippet view article find links to article

can be lowered, but not eliminated. However, with the introduction of ring strain into the molecule, aimed at destabilizing the localized ground state

EDDS (996 words) [view diff] exact match in snippet view article find links to article

rings project out of the plane of the complex, reducing the equatorial ring strain that exists in the Fe[EDTA]− complex. The complex also has C2 symmetry

Andy Ruiz Jr. (5,018 words) [view diff] no match in snippet view article find links to article

After I win me and Jarrell Miller will grab a burger together". The Ring. Strain, Todd (June 2, 2019). "Imperial County Boxer Andy Ruiz Jr. Wins Heavyweight

Asymmetric induction (3,674 words) [view diff] exact match in snippet view article find links to article

Leighton has developed chiral allysilicon compounds in which the release of ring strain facilitated the stereoselective allylation reaction, 95% to 98% enantiomeric

Fluorenylidene (789 words) [view diff] exact match in snippet view article find links to article

ideal bond geometry for cyclopentane carbons is about 109°, considerable ring strain causes the methylene sigma bonds to be bent. In the singlet state, the

Polyoxetane (1,844 words) [view diff] exact match in snippet view article find links to article

polymerizable. Reasons for inability to polymerize are different basicity and ring strain caused by different electron and bulkiness of substituents also as their

Single-layer materials (8,628 words) [view diff] exact match in snippet view article find links to article

the chair or boat, to allow for the ideal 109.5° angles which reduce ring strain, in a direct analogy to the conformers of cyclohexane. Graphane was first

Compliance constants (2,371 words) [view diff] exact match in snippet view article find links to article

results that are in accordance to what are generally known about the ring strain of cyclobutane. Diboryne or a compound with boron-boron triple bond was

Metal tetranorbornyl (1,879 words) [view diff] exact match in snippet view article find links to article

ligands on the complex have a strong dispersion attraction and high ring strain, which as a consequence hinders the α- and β-hydride elimination reactions

Dispersion stabilized molecules (2,637 words) [view diff] exact match in snippet view article find links to article

effect, wherein any stability gained by elongating a C-C bond to release ring strain would be countered by increased repulsion between the remaining tBu groups

Ketimine Mannich reaction (3,407 words) [view diff] exact match in snippet view article find links to article

asymmetric Mannich reaction of 3,4-dihydro-2H-1,4-benzoxazines. The aromatic ring strain in 3,4-dihydro-2H-1,4-benzoxazines helps increase reactivity of the C=N

Phosphetene (2,187 words) [view diff] exact match in snippet view article find links to article

various compounds to form 6-membered phosphorus heterocycles as well. Ring strain in four-membered phosphetene rings can be released by ring expansion