Description:
Neutral tribromo(2-phenyl-1,8-naphthyridine)gold(III), AuBr3(N-N), has been prepared by reaction of KAuBr4 with the ligand in CHCl3/C2H5OH and was characterized by 1H NMR spectroscopy and X-ray diffraction. The molecular and crystal structure of AuBr3(N-N) · 0.5 THF (triclinic, P1̄, a = 11.314(2), b = 12.350(3), c = 14.628(3) A° , α = 107.96(3), β = 98.86(3), γ = 107.29(3)◦, Z = 4, 173 K) shows coordination of the N8 nitrogen atom situated in the unsubstituted pyridine ring to the planar four-coordinate AuIII center. Whereas the AuBr3N best planes and the coordinated naphthyridine rings are not far from orthogonal (ω ~ 105◦), the phenyl substituents were found in the crystal with a ca. 22◦ dihedral angle relative to the naphthyridine plane. Intermolecular Au· · ·Br distances close to the sum of the van der Waals radii indicate very weak interactions to form a quasi-dimeric arrangement in the crystal.