Mixed-Ligand Iridium(III) Nitro Complexes with Phenantroline

Interaction of iridium(III) nitro-aqua complexes with 1,10-phenanthroline is studied. Complex anions [Ir(phen)(NO₂)₄]⁻ and [Ir(phen)(OH)(NO₂)₃]⁻ are isolated in the solid phase. The complex Na[Ir(phen)(NO₂)₄](phen)(H₂O) is structurally characterized for the first time. Crystallographic data: $a=8.0752\left(5\right)Ǻ$, $b=11.690\left(7\right)Ǻ$, $c=14.012\left(7\right)\alpha$, α = 105.55(2)°, β = 91,99(2)°, γ = 103,71(2)° space group P-1, Z = 2, ρ_calc = 1,936 g/cm³. The coordination sphere of the iridium atom has a distorted octahedral geometry. The obtained structure contains an island motif consisting of the pairs of complex anions [Ir(phen)(NO₂)₄]⁻ linked to each other by sodium cations.