{2-[(3,5-Dimethyl-2H-pyrrol-2-yl­idene-κN)(4-nitro­phen­yl)meth­yl]-3,5-dimethyl-1H-pyrrol-1-ido-κN}difluoridoboron

In an effort to discover novel and potential boron–dipyrromethene (BODIPY) dyes, the title compound, C₁₉H₁₈BF₂N₃O₂, was prepared from 2,4-dimethyl­pyrrole, 4-nitro­benzaldehyde and BF₃·Et₂O in a one-pot reaction. There are two independent mol­ecules, A and B, in the asymmetric unit in which the dihedral angles between the benzene ring and boron–dipyrromethene mean plane have significantly different values [82.71 (8)° for mol­ecule A and 73.16 (8)° for mol­ecule B]. Inter­molecular C—H...π inter­actions help to stabilize the crystal structure.

(2,2′-Bipyridine-6,6′-dicarboxyl­ato-κ³N,N′,O⁶)(6′-carb­oxy-2,2′-bipyridine-6-carboxyl­ato-κ³N,N′,O⁶)rhodium(III)

The Rh^III ion in the title compound, [Rh(C₁₂H₆N₂O₄)(C₁₂H₇N₂O₄)], is coordinated by four N atoms and two O atoms from two chelating ligands L and HL (H₂L = 2,2′-bipyridine-6,6′-dicarb­oxy­lic acid) to form a distorted octa­hedral geometry. Face-to-face π-stacking inter­actions are observed between inversion-related pyridine rings, with a centroid-to-centroid distance of 3.581 (1) Å [the perpendicular distance between the rings is 3.3980 (7) Å]. Inter­molecular O—H...O hydrogen bonds link adjacent mol­ecules into one-dimensional supra­molecular chains along the c axis, while several inter­molecular C—H...O inter­actions are also observed.