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The title complex, [Cu(C12H8N2)2]I, (I), has been crystallized in two polymorphic forms, both containing four‐coordinate copper. Both forms are orthorhombic, with form (Ia) crystallizing in the primitive space group Pban and form (Ib) in the c‐centred space group Ccca. In (Ia), the complex cation and the I− anion both have 222 crystallographic symmetry, and in (Ib), the complex cation has approximate 222 symmetry, with the I− counter‐ion distributed over three special positions.

A series of novel zinc(II) organophosphonates with coordinated 2,2′-bipyridyl (2,2′-bipy, C 10 H 8 N 2 ) and 1,10-phenanthroline (phen, C 12 H 8 N 2 ) ligands (with the proposed formulations:

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