Fullerite with intercalated freon Ch2F2

Fullerite C₆₀ with intercalated CH₂F₂ (Freon-32) was prepared for the first time. The sample was studied by elemental analysis, X-ray powder diffraction, mass spectrometry, and IR spectroscopy. The composition of the sample was found to be (CH₂F₂)C₆₀. The sample had a face-centered cubic lattice with the lattice parameter (1.4284 nm) much larger than that of pure fullerite (1.416 nm). The gas released from the sample during heating in a vacuum to 450°C largely consisted of initial Freon (mass spectrometry data); no Freon destruction products were observed at this temperature. The C-F stretching vibration frequency (1058 cm^?1) was shifted in (CH₂F₂)C₆₀ by 30 cm^?1 toward lower wave numbers compared with the gas phase. The absorption bands at 1182 and 1428 cm^?1 (IR active modes (F _1u ) of high-symmetry (I _h ) C₆₀ molecules) did not change their positions in the intercalate.