Solid-State Studies on a Cubic 1:1 Solvate of C 60 Grown from Dichloromethane and Leading to Another Hexagonal C 60 Polymorph
2001; American Chemical Society; Volume: 13; Issue: 4 Linguagem: Inglês
10.1021/cm001212y
ISSN1520-5002
AutoresR. Céolin, J. Ll. Tamarit, Marı́a Barrio, D. Ó. López, Siro Toscani, H. Allouchi, V. Agafonov, H. Szwarc,
Tópico(s)Synthesis and Properties of Aromatic Compounds
ResumoCrystals of a C60 1:1 solvate (I-centered cubic, a = 23.284(2) Å) were grown by evaporating solutions of C60 in H2CCl2 at room temperature. Solvate crystals are not air stable and spontaneously transform into a hexagonal polymorph of C60 (a = 10.044(5) Å, c = 16.404(8) Å, c/a = 1.633(2)) when extracted from the mother liquor at room temperature. Although solvate formation entails almost no volume change, desolvation enthalpy (59.2 kJ/mol of solvent) is found to be about twice as high as sublimation enthalpy for pure H2CCl2.
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