Infrared Absorption in Single Crystals of (ET)$\text{}_{2}$C$\text{}_{60}$ Grown from CS$\text{}_{2}$ Solution

Fourier transform IR absorption spectra of single crystals of the (ET)$\text{}_{2}$C$\text{}_{60}$ complex grown from the CS$\text{}_{2}$ solution as well as its components: C$\text{}_{60}$ and ET, also grown from CS$\text{}_{2}$ solution, are presented and discussed. It is shown that the rotation of C$\text{}_{60}$ is strongly hindered and ET molecules are bent in the crystal structure of the complex. The arguments for the domination of the van der Waals interactions are given.