期刊
ORGANOMETALLICS
卷 36, 期 6, 页码 1204-1210出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.organomet.7b00078
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资金
- American Chemical Society Petroleum Research Fund [56562-DNI3]
The synthesis of fully alkylated closo-hexaborate dianions is reported. The reaction of [NBu4][B6H6Hfac], benzyl bromide, and triethylamine under microwave heating conditions affords persubstituted [NBu4][B-6(CH2Ar)(6)H-fac] (Ar = C6H5, 4-Br-C6H4), which have been isolated and characterized by NMR spectroscopy, mass spectrometry, single crystal X-ray diffraction, and other spectroscopic techniques. Electrochemical studies of these clusters reveal an irreversible one-electron oxidation, likely indicating degradative cage rupture. The observed metal free alkylation is proposed to proceed as a consequence of the pronounced nucleophilic character of the hexaborate anion. This work represents the first example of a perfunctionalized hexaborate cluster featuring B-C bonds.
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