molecules are valence isomers when they are constitutional isomers that can interconvert through pericyclic reactions. There are many valence isomers one can...

distinct arrangements of atoms in space. Isomerism refers to the existence or possibility of isomers. Isomers do not necessarily share similar chemical...

In chemistry, a structural isomer (or constitutional isomer in the IUPAC nomenclature) of a compound is another compound whose molecule has the same number...

polycyclic hydrocarbon with the formula C6H6. It is an isomer of benzene, specifically a valence isomer. Prismane is far less stable than benzene. The carbon...

chain isomerism.) The tautomeric shift can be described as H−O ⋅ C=O ⇌ O−C−O−H, where the "⋅" indicates the initial absence of a bond. Valence tautomerism...

as cyclic dithiocarbonate units gave what is more likely a different valence isomer, as various dithiete-containing structures are predicted to be more...

In chemistry, conformational isomerism is a form of stereoisomerism in which the isomers can be interconverted just by rotations about formally single...

dichlorides react with ammonia to give cyanamides.: 1392  As a stabler valence isomer of carbodiimides, cyanamides form when carbodiimides are heated or undergo...

Diels-Alder reaction between cyclopentadiene and acetylene Quadricyclane, a valence isomer, can be obtained from norbornadiene by a photochemical reaction when...

somewhat less stable than the open 1,4-didehydrobenzene biradical, the valence isomer in which that bridged bond is broken. Ab initio calculations indicate...

polycyclic hydrocarbon tetra­dihydro­naphtho­[10]annulene, in which a valence isomer of [10]annulene is fused to two naphthalenes, does not exhibit aromaticity...

silabenzene is also light-sensitive; Ultraviolet irradiation gives the valence isomer, a silabenzvalene. The theoretical calculations and the NMR chemical...

synthesized a valence isomer of borepin, shown below. This bicyclic, boron-containing heterocycle can be interconverted to its borepin isomer using pericyclic...

with the existence of two different 1,2-dideutero-1,3-cyclobutadiene valence isomers. This distortion indicates that the pi electrons are localized, in...

E.; Ritscher, J. S.; Kaplan, L. (1967). "Benzvalene, the Tricyclic Valence Isomer of Benzene". Journal of the American Chemical Society. 89 (4): 1031...

Valence shell electron pair repulsion (VSEPR) theory (/ˈvɛspər, vəˈsɛpər/ VESP-ər,: 410  və-SEP-ər) is a model used in chemistry to predict the geometry...

correspond to a "primary" valence of 3 at long distance, while the Co-NH3 bonds which correspond to a "secondary" or weaker valence of 6 at shorter length...

Gornitzka, W. W. Schoeller, G. Bertrand,, « Isolation of a benzene valence isomer with one-electron phosphorus-phosphorus bonds », Science, 1998, 279...

seven-membered ring oxepin, which has three double bonds. They are valence isomers and in equilibrium via disrotatory 6π ring closing and opening. Arene...

of the valence shell of third period and heavier main group elements is controversial. A Lewis structure in which a central atom has a valence electron...

Larger molecules often exist in multiple stable geometries (conformational isomerism) that are close in energy on the potential energy surface. Geometries...

dichlorine trioxide, Cl2O3 as possible isomer Cl−O−ClO2, chlorine (I,V) oxide dichlorine trioxide, Cl2O3 as hypothetical isomer O−Cl−O−Cl−O, chlorine (III) oxide...

Although 1,2-dithiones are rare and thus not useful precursors, their valence isomer, the 1,2-dithietes are occasionally used. One of the more common dithiete...

(Annulenes, Benzo-, Hetero-, Homo-Derivatives and Their Valence Isomers). Some of these valence isomers undergo thermal or pohotochemical automerizations....

have been proposed. Current VB approaches are: Generalized valence bond (GVB) Modern valence bond theory (MVBT) A method that avoids making the variational...

triple-decker sandwich complex with 28 valence electrons. If P6, similar to C6H6, is taken as a 10π electron donor, a 32 valence electron count may be obtained...

has four valence electrons. The carbon atoms in alkanes are described as sp3 hybrids; that is to say that, to a good approximation, the valence electrons...

perfluorohexamethylbicyclopropenyl (5) to flesh out the first complete set of benzene valence isomers. This compound rearranges thermally to 1 with a half-life of ≥ 2 h...

Metal-Sandwich Compounds Mechanism of Metal-Catalyzed Cycloaddition Reactions Valence Isomers of Benzene Olefin Metathesis Reaction Enyne Metathesis Reaction Children...

been synthesized. Thietes are generally not very stable. Thiete is a valence isomer of the compound thioacrolein (CH2=CHCH=S) and undergoes ring opening...