Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroborate, is researched, Molecular C21H25BF4N2, CAS is 286014-53-7, about Pyridin- and quinolinylidene nickel carbene complexes as effective catalysts for the Grignard cross-coupling reaction.Application In Synthesis of 1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroborate.
Complex compounds that contain N-heterocyclic carbene (NHC) and N-heterocyclic carbene ligands with a remote heteroatom (rNHC) were prepared in good yields and characterized. [Cl(NHC)(PPh3)2Ni]BF4 and [Cl(rNHC)(PPh3)2Ni]BF4 also combine the stability of carbene complexes with the activity of phosphine complexes and some are active and effective precatalysts for aryl-coupling in the Kumada-Corriu reaction. Aryl chlorides can be used as substrates. Their performance in catalysis as well as their easy preparation make the new compounds superior to other comparable mixed carbene-phosphine compounds known thus far.
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Reference:
Bromide – Wikipedia,
bromide – Wiktionary