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searching for Steric effects 64 found (145 total)

Electrophilic aromatic substitution (2,168 words) [view diff] no match in snippet view article find links to article

Electrophilic aromatic substitution (SEAr) is an organic reaction in which an atom that is attached to an aromatic system (usually hydrogen) is replaced

Fleming–Tamao oxidation (2,000 words) [view diff] no match in snippet view article find links to article

The Fleming–Tamao oxidation, or Tamao–Kumada–Fleming oxidation, converts a carbon–silicon bond to a carbon–oxygen bond with a peroxy acid or hydrogen peroxide

JWH-372 (289 words) [view diff] exact match in snippet view article find links to article

electron-withdrawing character of the trifluoromethyl group rather than steric effects, as the o-methyl compound JWH-370 was only mildly selective for the

Tetra-tert-butylmethane (215 words) [view diff] exact match in snippet view article find links to article

length of 166.1 pm — longer than the typical C−C bond in order to reduce steric effects, but still shorter than those found in some other real molecules. Neopentane

Hydroformylation (3,140 words) [view diff] no match in snippet view article find links to article

In organic chemistry, hydroformylation, also known as oxo synthesis or oxo process, is an industrial process for the production of aldehydes (R−CH=O) from

Pempidine (437 words) [view diff] case mismatch in snippet view article find links to article

1476-5381.1959.tb01384.x. PMC 1481796. PMID 13662574. Hall HK (1957). "Steric Effects on the Base Strengths of Cyclic Amines". Journal of the American Chemical

Hemiacetal (404 words) [view diff] exact match in snippet view article find links to article

equilibrium is easily reversed and dynamic. The equilibrium is sensitive to steric effects. Arguably, the most common hemiacetals are sugars, for example glucose

Rhodamine (732 words) [view diff] exact match in snippet view article find links to article

influencing the properties of the xanthene dyes by both electronic and steric effects. Specifically designed substituents also allows xanthenes to bear specific

Robert R. Squires (366 words) [view diff] case mismatch in snippet view article find links to article

Institutions Purdue University Thesis Application of an Automated Calorimetry System in the Study of Steric Effects (1980) Doctoral advisor Kenneth B. Wiberg

Philip Power (379 words) [view diff] exact match in snippet view article find links to article

University (1978–1980) University of California, Davis (1981–present) Thesis Steric effects in group 4B and 5B metal aklyls and amides (1977) Doctoral advisor Michael

Pyridinium (380 words) [view diff] case mismatch in snippet view article find links to article

Williams, Forrest V. (1953). "Rates of Ionization of Pseudo Acids.1V. Steric Effects in the Base-catalyzed Ionization of Nitroethane". Journal of the American

Triphenylmethane (614 words) [view diff] exact match in snippet view article find links to article

hydrocarbons because the charge is delocalized over three phenyl rings. Steric effects however prevent all three phenyl rings from achieving coplanarity simultaneously

Methyl anthranilate (615 words) [view diff] case mismatch in snippet view article find links to article

(5): 1480–1513. doi:10.1002/hlca.19630460506. Halama; Pytela (1996). "Steric Effects in Acid-Catalyzed Decomposition and Base-Catalyzed Cyclization of

Tris(dimethylamino)phosphine (260 words) [view diff] exact match in snippet view article

Chemistry. 2 (5): 936–944. doi:10.1021/ic50009a014. Tolman, C. A. (1977). "Steric effects of phosphorus ligands in organometallic chemistry and homogeneous catalysis"

Methyllithium (981 words) [view diff] exact match in snippet view article find links to article

(tertiary-butylLi)4, where intercluster interactions are precluded by steric effects, is volatile as well as soluble in alkanes. Colour code: Li- purple

Ceiling temperature (728 words) [view diff] exact match in snippet view article find links to article

because the phenyl and methyl groups are bonded to the same carbon. These steric effects in combination with stability of the tertiary benzylic α-methylstyryl

Chadwick A. Tolman (898 words) [view diff] exact match in snippet view article find links to article

original on 2011-08-13. Retrieved 2011-03-21. Tolman, C. A. (1977). "Steric effects of phosphorus ligands in organometallic chemistry and homogeneous catalysis"

James A. Ibers (309 words) [view diff] exact match in snippet view article find links to article

Thomas G. "How far can proteins bend the FeCO unit? Distal polar and steric effects in heme proteins and models" Journal of the American Chemical Society

Heteroatom-promoted lateral lithiation (1,692 words) [view diff] exact match in snippet view article find links to article

inductive electron donation from the additional alkyl group (rather than steric effects). Electrophiles that react with the benzylic anions formed by these

Triisopropylphosphine (98 words) [view diff] case mismatch in snippet view article find links to article

temperature and more soluble in hydrocarbons. C. A. Tolman (1977). "Steric Effects of Phosphorus Ligands in Organometallic Chemistry and Homogeneous Catalysis"

Lactase (2,143 words) [view diff] exact match in snippet view article find links to article

1995). "Substrate specificity of small-intestinal lactase: study of the steric effects and hydrogen bonds involved in enzyme-substrate interaction". Carbohydrate

Electrophile (2,321 words) [view diff] exact match in snippet view article find links to article

nucleophilicity of the halide ion, stability of the carbocation, and steric effects. As brief examples, the formation of a sterically unencumbered, stabilized

London dispersion force (1,613 words) [view diff] exact match in snippet view article find links to article

(2015), "London dispersion in molecular chemistry — reconsidering steric effects", Angewandte Chemie International Edition, 54 (42), Wiley: 12274–12296

Excimer (1,166 words) [view diff] exact match in snippet view article find links to article

intersection of this exciplex state with the ground state in a balance of steric effects, electrostatic interactions, stacking interactions, and relative conformations

DuPont Central Research (3,971 words) [view diff] exact match in snippet view article find links to article

angle” theory that developed into the widely accepted electronic and steric effects of ligands on inorganic and organometallic complexes. Organometallic

Dimethylphenylphosphine (649 words) [view diff] exact match in snippet view article find links to article

doi:10.1002/chem.200601484. PMID 17245785.. C. A. Tolman, Chem. Rev., Steric effects of Phosphorus Ligands in Organometallic Chemistry and Homogeneous Catalysis

Sulfenic acid (1,217 words) [view diff] exact match in snippet view article find links to article

spectroscopy) to be CH3–S–O–H. Sulfenic acids can be stabilized through steric effects, which prevent the sulfenic acid from condensing with itself to form

Metal-phosphine complex (1,418 words) [view diff] exact match in snippet view article find links to article

1002/9780470132418.ch12. ISBN 9780470131695. Tolman, C. A. (1977). "Steric effects of Phosphorus Ligands in Organometallic Chemistry and Homogeneous Catalysis"

Imine (2,633 words) [view diff] exact match in snippet view article find links to article

spectroscopy, both E and Z isomers of aldimines have been detected. Owing to steric effects, the E isomer is favored. The term "imine" was coined in 1883 by the

Ronald Breslow (2,073 words) [view diff] exact match in snippet view article find links to article

comparable acidity, combined with previous studies indicating that steric effects are largely negligible. The straight chain analogs are shown below.

Tolman electronic parameter (616 words) [view diff] exact match in snippet view article find links to article

doi:10.1002/0471718769.ch4. ISBN 9780471718765. Tolman, C. A. (1977). "Steric effects of phosphorus ligands in organometallic chemistry and homogeneous catalysis"

Organolithium reagent (5,971 words) [view diff] exact match in snippet view article find links to article

between lithium and surrounding solvent molecules or polar additives, and steric effects. A basic building block toward constructing more complex structures

Bürgi–Dunitz angle (1,573 words) [view diff] exact match in snippet view article find links to article

PA:Saunders Company.[page needed] Lodge, E.P. & Heathcock, C.H. (1987) Steric effects, as well as sigma*-orbital energies, are important in diastereoface

Metal ammine complex (1,787 words) [view diff] exact match in snippet view article find links to article

a Lewis base and a "pure" sigma donor. It is also compact such that steric effects are negligible. These factors simplify interpretation of structural

Sigrid D. Peyerimhoff (453 words) [view diff] case mismatch in snippet view article find links to article

Molecules. Peyerimhoff, Sigrid D. Interactions in Molecules: Electronic and Steric Effects. Weinheim: Wiley-VCH, 2003. ISBN 3-527-27732-3 Jug, Karl (2014). Zweihundert

Transition metal carbene complex (1,995 words) [view diff] exact match in snippet view article find links to article

ligands that influence catalysis through a combination of electronic and steric effects, but they do not directly bind substrates. An early example of this

Klopman–Salem equation (810 words) [view diff] exact match in snippet view article find links to article

2006 ed.). Chichester, UK: Wiley. p. 27. ISBN 978-0471018209. The term steric effects is broad and often includes the result of Coulombic repulsion as well

Koelsch radical (654 words) [view diff] exact match in snippet view article find links to article

unpaired electron is located predominantly at the 1 and 3 positions. Steric effects from the biphenyl substituents also contribute to the compound's stability

Glycan (3,161 words) [view diff] exact match in snippet view article find links to article

cytoplasmic proteases. N-linked glycans also contribute to protein folding by steric effects. For example, cysteine residues in the peptide may be temporarily blocked

Protein phosphatase 1 (2,050 words) [view diff] exact match in snippet view article find links to article

complexed with PP1, but the catalytic subunit of PP1 does in order to avoid steric effects of Tyr 276 of PP1 and Mdha side chain of MCLR. Cantharidic acid is also

Camphorsultam (638 words) [view diff] exact match in snippet view article find links to article

theoretically possible, only the exo isomer is actually produced due to steric effects of one of the methyl groups. Camphorsultam is often referred to as Oppolzer's

Aminoacyl-tRNA (1,630 words) [view diff] exact match in snippet view article find links to article

between the amino acid and tRNA. Such observations are due to, primarily, steric effects. Steric hindrance is provided for by specific side chain groups of amino

Butadiene (3,158 words) [view diff] exact match in snippet view article find links to article

double bonds is maximized, allowing for maximum conjugation, while steric effects are minimized. Conventionally, the s-trans conformation is considered

Organophosphine (1,699 words) [view diff] exact match in snippet view article find links to article

often with smaller C-E-C angles (E = N, P), at least in the absence of steric effects. The C-P-C bond angle is 98.6° for trimethylphosphine increasing to

Metal carbonyl (7,931 words) [view diff] exact match in snippet view article find links to article

known. Group 5 elements with 5 valence electrons, again are subject to steric effects that prevent the formation of M–M bonded species such as V2(CO)12, which

Donna Nelson (4,514 words) [view diff] case mismatch in snippet view article find links to article

1564. Nelson, D. J.; Perng, Tamy. "The Use of Relative Magnitudes of Steric Effects to Explore Reactions of Molecular Halogens with Representative Acyclic

DeLos F. DeTar (713 words) [view diff] exact match in snippet view article find links to article

2022. DeTar, D.F.; Luthra, N.P. (1980). "Quantitative evaluation of steric effects in SN2 ring closure reactions". Journal of the American Chemical Society

Aryne (3,128 words) [view diff] case mismatch in snippet view article find links to article

Neil K.; Houk, K. N. (2014-11-05). "The Role of Aryne Distortions, Steric Effects, and Charges in Regioselectivities of Aryne Reactions". Journal of the

Heterobimetallic catalysis (1,734 words) [view diff] exact match in snippet view article find links to article

nucleophilic assistance (Scheme 7). The calculations have shown that steric effects imparted by the ancillary ligands could result in enormous differences

Katrina Forest (1,041 words) [view diff] exact match in snippet view article find links to article

Katrina T.; Raines, Ronald T. (2010-01-12). "Stereoelectronic and steric effects in side chains preorganize a protein main chain". Proceedings of the

Perfluorobutanesulfonyl fluoride (1,192 words) [view diff] exact match in snippet view article find links to article

ISSN 0936-5214. Meadows, Rebecca E.; Simon Woodward (2008-02-11). "Steric effects in palladium-catalysed amination of aryl triflates and nonaflates with

3,4-Ethylidenedioxyamphetamine (233 words) [view diff] exact match in snippet view article find links to article

DiFMDA EDMA F-2 (psychedelic) Nichols DE, Kostuba LJ (October 1979). "Steric effects of substituents on phenethylamine hallucinogens. 3,4-(Methylenedioxy)amphetamine

Hexachlorophosphazene (1,914 words) [view diff] exact match in snippet view article find links to article

(NP(OR)2)3 + 3 NaCl The observed regioselectivity is due to the combined steric effects and oxygen lone pair π-backdonation (which deactivates already substituted

2,5-Diketopiperazine (2,289 words) [view diff] exact match in snippet view article find links to article

cationic precursors (and N-acyliminium ion) and are sensitive to polar and steric effects. Alkylation of the bis-paramethoxybenzyl (pMB) protected 2,5-DKP 1 using

Metal bis(trimethylsilyl)amides (3,034 words) [view diff] exact match in snippet view article

The low coordination number of the iron complex is largely due to the steric effects of the bulky bis(trimethylsilyl)amide, however the complex will bind

Flippin–Lodge angle (3,935 words) [view diff] exact match in snippet view article find links to article

ISBN 978-3-527-61608-4. Retrieved 1 March 2016. E.P. Lodge & C.H. Heathcock (1987) Steric effects, as well as sigma*-orbital energies, are important in diastereoface

Properties of water (9,582 words) [view diff] exact match in snippet view article find links to article

bonds: either they cannot donate or accept hydrogen atoms, or there are steric effects in bulky residues. In water, intermolecular tetrahedral structures form

Cereblon E3 ligase modulator (5,487 words) [view diff] exact match in snippet view article find links to article

activity. The effects of these substitutions seem to be mediated by steric effects. For the Y-position, a number of groups have been explored. Substituted

Willard Gibbs Award (6,005 words) [view diff] exact match in snippet view article find links to article

electrostatic effects of substituents, the first successful calculation of steric effects from measurable physical parameters, and the rigorous application of

Boranylium ions (2,860 words) [view diff] exact match in snippet view article find links to article

Lewis acidity is of the boron atom is determined by the electronic and steric effects of its ligands. N-heterocyclic carbene (NHC)-stabilized borenium ions

Plumbylene (3,070 words) [view diff] case mismatch in snippet view article find links to article

Philip P. (2004). "Terphenyl Ligand Stabilized Lead(II) Derivatives: Steric Effects and Lead−Lead Bonding in Diplumbenes". Inorganic Chemistry. 43 (23):

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

tetragonal molecular geometry. A combination of London dispersion force and steric effects from the 1-norbornyl ligands results in the stability observed for the

Molecular Inversion Probe (4,910 words) [view diff] exact match in snippet view article find links to article

successful applications worked with 100 to 200bp target lengths), otherwise steric effects may interfere with successful hybridization of the probes to their targets

Oxalate nitrate (2,143 words) [view diff] exact match in snippet view article find links to article

"Supramolecular architectures of novel chromium(iii) oxalate complexes: steric effects of the ligand size and building-blocks approach". Dalton Transactions