Crystal structures of chloro-, bromo-, and nitro-substituted chromium(III) acetylacetonates.

The molecular and crystal structures of chlorine-, bromine-, and nitro-substituted chromium(III) acetylacetonate are determined. Connecting the substituent to the central atom does not change bond lengths and valence angles in metal chelate rings. Studied chromium complexes are characterized by greater intermolecular interactions compared with analogous metal acetylacetonates. In some cases, intermolecular interactions increase the bend of chelate rings along the O⋯O line. Substituents do not interact with chromium ions of neighboring molecules because metal is blocked by three ligands. [ABSTRACT FROM AUTHOR]