Nitrile insertion into a boryl-substituted five-membered zirconacycloallenoid: unexpected formation of a zwitterionic boratirane product.
نویسندگان
چکیده
Nitrile insertion into a zirconacycloallenoid complex leads to the formation of a seven-membered ring product with an attached boratirane unit.
منابع مشابه
Formation and structural characterization of a five-membered zirconacycloallenoid.
A conjugated enyne reacts with in situ generated zirconocene to yield a five membered zirconacycloallenoid that was characterized by X-ray diffraction.
متن کاملFormation of N-heterocyclic, donor-stabilized borenium ions.
Cationic and zwitterionic boryl bromide species and a borenium-boryl bromide cation have been synthesised which represent new N-donor stabilised cationic boron compounds with β-diketiminate ligands. The unexpected borenium-boryl bromide results from a head-to-tail dimerisation of the corresponding zwitterionic boryl bromide accompanied by proton migration. The electronic nature of these new spe...
متن کاملReaction of five-membered zirconacycloallenoids with the strong Lewis acid B(C6F5)3.
Two alkyl and aryl substituted five-membered zirconacycloallenoids underwent a typical σ-alkyl metallocene reaction with B(C6F5)3, namely cleavage of the Zr-C(sp(3)) bond with formation of zwitterionic (η(2)-allenyl)zirconium/alkylborate products. Both products were characterized by X-ray crystal structural analyses.
متن کاملA Computational Study on the Kinetic Stability of Cyclic Boryl Anions
In this study, we perform an MPW1K investigation on the kinetic stability of a cyclic boryl anion. According to our calculation, the bulkier the R and R’ groups are, the more kinetically stable a five-membered boryl anion may be. Nitrogen should be a more efficient donor to increase the kinetic stability of a cyclic boryl anion than P, As, O, S and Se. Although, one nitrogen atom is enough to s...
متن کاملGeneration and characterization of a 4π-electron three-membered ring 1H-diazirine: An elusive intermediate in nitrile imine-carbodiimide isomerization.
The photolysis at 222 nm of 5-methyltetrazole isolated in a cryogenic argon matrix leads to formation of methyl nitrile imine as primary product. Subsequent irradiation at 328 nm induces transformation of the nitrile imine into 4π-electron three-membered-ring 3-methyl-1H-diazirine, which photorearranges to give methyl carbodiimide. These products were characterized by IR spectroscopy and theore...
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ورودعنوان ژورنال:
- Chemical communications
دوره 43 شماره
صفحات -
تاریخ انتشار 2009