Crystal Engineering of Conglomerates: Dilution of Racemate-Forming Fe(II) and Ni(II) Congeners into Conglomerate-Forming [Zn(bpy)3](PF6)2

Conglomerate formation, where enantiomers within a racemic mixture self-segregate upon crystallization, is an advantageous property for obtaining chirally pure crystals and allows large-scale chiral resolution. However, the prevalence of conglomerates low difficult to predict. In this report, we describe our attempts engineer from racemate-forming compounds by integrating them into conglomerate-forming matrix. regard, found that Ni(II) Fe(II) form molecular alloys with Zn(II) in [MxZn(1−x)(bpy)3](PF6)2 (where bpy = 2,2′-bipyridyl). Powder X-ray Diffraction (PXRD) Energy-Dispersive spectroscopy (EDX) evidenced conglomerate crystallization concentrations up about 25%, while it was observed only much lower Fe(II). This can be attributed ability [Ni(bpy)3](PF6)2 access metastable phase, no such phase has been detected [Fe(bpy)3](PF6)2. Furthermore, appears favored fast-growing precipitates, slow re-crystallizations both alloys. natural circular dichroism (XNCD) measurements on [Ni0.13Zn0.87(bpy)3](PF6)2 demonstrate chirality nickel molecules zinc