Table 2. Obtained single crystals.

Crystals were grown by mixing 5 µl of the organic cation solution and 5 µl of the anion solution unless otherwise noted. DX: crystals were observed after X days.

Salt providing the new anion	Molarity	[(+)-EphH]Cl	[(−)-Car]Cl	[(±)-Car]Cl	[DilH]Cl	[TrazH]Cl
Sodium bromide	4.08	D0†	D14‡		D5
Sodium iodide	5.34	D5†	D8‡	D11	D6	D1†, §
Sodium tetra­fluoro­borate	2.00		D10¶			D3§
Potassium thio­cyanate	7.34	D2†				D1§
Sodium nitrate	4.61	D30‡, ††,			D6	D1§
Sodium di­hydrogen phosphate	3.40				D5
Sodium pyrrolidone carboxyl­ate	4.96	D1††
Sodium benzene­sulfonate	1.10	D16†, ††
Disodium oxalate	0.138	D6†, ††				D1†, §
Disodium malonate	2.97	D16†, ††
Sodium L-malate	2.92	D30††
Potassium sodium L-tartrate	1.40	D30††
No additional salt added		D15†	D14	D7	D6†

^†Published structure, sometimes of the other enantiomer (Hearn & Bugg, 1972 ▸; Kojić-Prodić et al., 1984 ▸; Collier et al., 2006 ▸; Wu et al., 2012 ▸; Nievergelt et al., 2018 ▸).

^‡Crystallized after touching the drop with a spatula or scratching the well with a dissecting needle.

^§Obtained by mixing 4 µl of the trazodone solution and 10 µl of the anion solution.

^¶Concentration of sodium tetra­fluoro­borate was 4.0M.

^††Obtained by mixing 2 µl of the ephedrine solution and 20 µl of the anion solution.

^‡‡Two polymorphs (I† and II) observed.