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Tris(pentafluorophenyl)borane, sometimes referred to as "BCF", is the chemical compound (C 6 F 5) 3 B.It is a white, volatile solid. The molecule consists of three pentafluorophenyl groups attached in a "paddle-wheel" manner to a central boron atom; the BC 3 core is planar.
The anion is tetrahedral with B-C bond lengths of approximately 1.65 Angstroms. The salt has only been obtained as the etherate, and the crystallography confirms that four ether (OEt 2) molecules are bound to the lithium cation, with Li-O bond lengths of approximately 1.95 Å.
Bromopentafluorobenzene is an organofluorine compound with the formula C 6 F 5 Br. It is a colorless liquid that is used to prepare pentafluophenyl compounds. These syntheses typically proceed via the intermediacy of C 6 F 5 Li or the Grignard reagent. [1]
In chemistry, isomerization or isomerisation is the process in which a molecule, polyatomic ion or molecular fragment is transformed into an isomer with a different chemical structure. [1] Enolization is an example of isomerization, as is tautomerization .
Organoxenon compounds are frequently prepared from organocadmium species including Cd(Ar F) 2 (where Ar F is a fluorine-containing arene), C 6 F 5 SiF 3, and C 6 F 5 SiMe 3 (used along with fluoride). With the use of stronger Lewis acids, such as C 6 F 5 BF 2, ionic compounds like [RXe][Ar F BF 3] can be produced.
The activation barrier of isomerization of 1,3–hexadiene through a [1,5]–shift is 41 Kcal mol–1 and is expected to increase with conjugation to the ester, thus uncatalyzed isomerization is unlikely. [11] This provides the advantage of bypassing a high barrier of activation, providing access to previously unobtainable IMDA derivatives.
There are many valence isomers one can draw for the C 6 H 6 formula benzene.Some were originally proposed for benzene itself before the actual structure of benzene was known.
The alkyne zipper reaction is an organic reaction that involves isomerization of a non terminal alkyne into a terminal alkyne. This reaction was first reported by Alexey Favorsky in 1887 (J. Russ. Phys.-Chem. Soc., 19, 414 (1887)).