Crystal structures of cis-diiododiammine platinum and trans-diazidodiammine platinum

Platinum(II) complexes cis -[Pt(NH 3 ) 2 I 2 ] ( 1 ) and trans -[Pt(NH 3 ) 2 (N 3 )2] ( 2 ) are structurally characterized separately for the first time. The crystallographic data are as follows: for 1 , a = 7.0065(6) Å, b = 6.8714(6) Å, c = 7.4106(8) Å, β = 108.432(7)°, space group P 2 1 / m , Z = 2, ρ calc = 4.739 g/cm 3 ; for 2, a = 8.1337(5) Å, b = 11.5821(7) Å, c = 6.9705(5) Å, β = 107.256(2)°, space group P 2 1 / c , Z = 4, ρ calc = 3.318 g/cm 3 . Platinum atoms have a square planar environment; the main structure-forming factor is the presence of intermolecular hydrogen bonds forming chain motifs in the structure of 1 and a threedimensional framework in the structure of 2 .