Compound (H2O)2@C70
(H2O2)2@C70 fullerene
From: Synthesis of a distinct water dimer inside fullerene C70
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Synthetic procedure: See article for the definitive version of this procedure and for full experimental details.
To a solution of H2O@β-8mem (10.8 mg, 0.00918 mmol) in 1-chloronaphthalene (1.5 mL) was added N-phenylmaleimide (5.6 mg, 0.032 mmol) and the mixture was stirred at 255 ºC for 40 h. The reaction mixture was directly subjected to flash column chromatography over silica gel. Elution with hexane gave product H2O@C70 (4.0 mg, 0.0046 mmol, 50% yield, 82% encapsulation ratio) as black powder. Further purification by the use of preparative HPLC gave a toluene solution of H2O@C70 with 100% encapsulation of H2O and another solution of containing H2O@C70 and (H2O)2@C70 in a 2:3 ratio. (H2O)2@C70: 1H NMR (500 MHz, CDCl3/CS2 = 1/1) δ –25.25 (s); HRMS (–APCI), calcd for C70H4O2 (M-) 876.0217, found 876.0259.
