*2.3. Hetero-Seeding Experiments*

In order to obtain single crystals suitable for SCXRD characterisation, evaporation experiments were performed from saturated solutions of the different powders obtained from LAG experiments in DCM. In almost all six cases, single crystals suitable for SCXRD were obtained, except for the **(lid)2(res)** phase, which only formed a microcrystalline material. A hetero-seeding approach was used to obtain single crystals for this phase, using microcrystalline phases obtained for other coformers with predictably similar structures, getting good results using **(lid)2(hq)** as the hetero-seed. This was confirmed after the structure solution because both new cocrystals were isostructural.

For the seeding experiment, a few micrometric solid particles of hetero-seed powder **(lid)2(hq)** were added to the liquified mixture obtained from **(lid)2(res)** LAG experiments, which immediately started to crystallise as single crystals later identified as **(lid)2(res)**.

For the remaining phases, **(lid)2(hq)**, **(lid)2(pyr)**, **(lidhcl)2(hq)**, **(lidhcl)2(res)**, **and (lidhcl)2(pyr)** were obtained by direct recrystallisation from the oily liquid obtained in LAG experiments.
