*2.5. Single-Crystal X-ray Diffraction*

Measured crystals were prepared under inert conditions immersed in perfluoropolyether as the protecting oil for manipulation. Suitable crystals were mounted on MiTeGen Micromounts™ (95 Brown Rd, Ithaca, NY, USA) and these samples were used for data collection. Data were collected with a Bruker D8 Venture diffractometer and processed with the APEX3 suite [14]. Structures were solved by direct methods [15], which revealed the position of all non-hydrogen atoms. These atoms were refined on F2 by a full-matrix least-squares procedure using anisotropic displacement parameters [15]. All hydrogen atoms were located by difference Fourier maps and included as fixed contributions riding on attached atoms with isotropic thermal displacement parameters 1.2 times those of the respective atom. Geometric calculations and molecular graphics were performed with Mercury [16] and Olex2 [17]. Additional crystal data are shown in Table 1.


**Table 1.** Crystallographic information of **(lid)** and **(lidhcl)** multicomponent forms.
