Capturing Axially Chiral Conformations of 2,2′-bipyridine in [Mn(II)(2,2′-bpy)(HCO2)2-x(N3)x] via Spontaneous Resolution

The axially chiral conformations of 2,2'-bipyridine are, for the first time, captured and isolated in individual crystals of a new family of three-dimensional coordination polymers [Mn(II)(2,2'-bpy)(HCO2)(2-x)(N-3)(x)] (x = 0.3-0.7) upon an unusual spontaneous resolution. Furthermore, the Mn(II)center dot center dot center dot Mn(II) magnetic exchange can be tuned by control of the ratio of N-3(-)/HCO2-.