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Conjugate: compounds

The Huckel method and is one of the earliest and simplest semiempirical methods. A Huckel calculation models only the 7t valence electrons in a planar conjugated hydrocarbon. A parameter is used to describe the interaction between bonded atoms. There are no second atom affects. Huckel calculations do reflect orbital symmetry and qualitatively predict orbital coefficients. Huckel calculations can give crude quantitative information or qualitative insight into conjugated compounds, but are seldom used today. The primary use of Huckel calculations now is as a class exercise because it is a calculation that can be done by hand. [Pg.33]

Concerning nomenclature, fulvalene 2 and its related systems 1 and 3-6 are the parent structures of this class of heterocyclic cross-conjugated compounds. Both ring systems are numbered as shown in formula 9 (1,4,5,8-tetraazafulva-lene) beginning at the heteroatoms. Alternatively, as in the case of heptafulva-lene 10 (3,3 -diazaheptafulvalene), the numbers 1-7 and l -7 can be used.Tlie use of the name of the parent heterocycle connected by an olefinic double bond is often favored for the nomenclature of electron-rich olefines, for example, bis[3-(2,6-diisopropylphenyl)-4,5-dimethylthiazol-2-ylidene] for compound 51a (97LAR365). Similarly, azafulvalenes of type 11 and 12 can be re-... [Pg.117]

Although azafulvalenes as yet comprise a small class of cyclic cross-conjugated compounds, they have been the subject of a variety of theoretical investigations spanning a range from the Hiickel (HMO) theory to the... [Pg.145]

The unsaturated compounds we looked at in Chapters 6 and 7 had only one double bond, but many compounds have numerous sites of unsaturation. If the different unsaturations are well separated in a molecule, they react independently, but if they re close together, they may interact with one another. In particular, compounds that have alternating single and double bonds—so-called conjugated compounds—have some distinctive characteristics. The conjugated diene 1,3-butadiene, for instance, has some properties quite different from those of the nonconjugated 1,4-pentadiene. [Pg.482]

In a cross-conjugated compound, three groups are present, two of which are not conjugated with each other, although each is conjugated with the third. Some... [Pg.39]

Alkali metal reduction is a widely employed method for the preparation of radicals derived from various classes of conjugated compounds such as hydrocarbons, heterocycles, nitro compounds, quinones, and nitriles. For... [Pg.329]


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See also in sourсe #XX -- [ Pg.102 , Pg.140 ]




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1.5- Dicarbonyl compounds conjugate addition

Aldehydes reaction with conjugated compounds

Alkyl compounds, conjugate

Alkyl compounds, conjugate synthesis

Allylic compounds conjugated diene preparation

Aluminum compounds conjugate substitution

Boron compounds, conjugate

Boron compounds, conjugate addition

Carbonyl compound by conjugate addition

Carbonyl compounds 1,4-conjugate addition of hydrazones

Carbonyl compounds conjugate addition

Carbonyl compounds conjugated unsaturated

Carbonyl compounds conjugated, addition

Carbonyl compounds conjugated, resonance

Carbonyl compounds conjugation effects

Carbonyl compounds sulfone conjugate additions

Carboxylic acids, conjugated compounds

Condensation reactions, carbonyl compounds conjugate addition

Conjugate Addition to Carbonyl Compounds

Conjugate Addition to a,3-Unsaturated Carbonyl Compounds

Conjugate addition Conjugated compounds, palladium enolates

Conjugate addition compounds

Conjugate addition of 1,3-dicarbonyl compounds

Conjugate addition organocopper compounds

Conjugate addition reactions compounds

Conjugate addition to unsaturated carbonyl compound

Conjugate addition to unsaturated nitro compounds

Conjugate addition with boron compounds

Conjugate: compounds radicals

Conjugated Compounds and Ultraviolet Spectroscopy

Conjugated carbonyl compounds

Conjugated carbonyl compounds, epoxidations

Conjugated carbonyl compounds, formation

Conjugated carbonyl compounds, reduction with

Conjugated compounds

Conjugated compounds

Conjugated compounds addition reactions

Conjugated compounds with

Conjugated compounds with acylation

Conjugated compounds with anions

Conjugated compounds with halogenation

Conjugated compounds with radical addition

Conjugated compounds, 1,2-addition

Conjugated compounds, 1,2-addition with organolithium reagents

Conjugated compounds, 1,4-reduction

Conjugated compounds, and

Conjugated compounds, reaction with Grignard reagents

Conjugated compounds, reaction with boranes

Conjugated compounds, reaction with enamines

Conjugated compounds, reaction with enolate anions

Conjugated compounds, reaction with hydroperoxide anion

Conjugated compounds, reaction with organocuprates

Conjugated diene complexes of mercury compounds

Conjugated diene complexes of selenenyl compounds

Conjugated diene complexes of sulphenyl compounds

Conjugated ferrocene compounds

Conjugation of amino acids with other compounds

Conjugation reactions compounds

Conjugation reactions endogenous compounds

Cross-conjugated compounds, palladium

Dialkylzinc compounds conjugate addition

Diyne conjugation compounds

Donor-acceptor -conjugated compounds

Halogens reaction with conjugated compounds

Heck reaction with conjugated compounds

Hydrocyanation of conjugated carbonyl compounds

Hydrogenation, catalytic, alkene conjugated compounds

Indoles with conjugated carbonyl compounds

Ketones, catalytic conjugated compounds

Magnesium, organo- compounds copper-catalyzed conjugate addition

Nucleophilic Addition to Conjugated Carbonyl Compounds

Of conjugated compounds

On Classification of Polycyclic Conjugated Compounds

Organoaluminum compounds conjugate additions

Organoboron compounds conjugate additions

Organocopper compounds conjugate

Organolithium compounds conjugate additions

Organometallic compounds conjugate addition

Organometallic compounds with conjugated carbonyl

Organozinc compounds conjugate addition-alkylation

Organozinc compounds conjugate additions

Protein-toxic compound conjugates

Reaction with conjugated compounds

Resonance in conjugated carbonyl compounds

Ring structure diene-conjugated compounds

Third conjugated compounds

Unsaturated carbonyl compounds conjugate additions

Ylide compounds alkene-conjugated ylides

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