Synthesis and crystal structure of platinum(II) acetamidates [Pt(2,2′-bipy)(NHCOCH3)2] and [enPt(μ-NHCOCH3)(μ-OH)Pten](NO3)2

The diamines PtbipyCl2, and PtenCl2 and their aqua and hydroxy derivatives react with acetonitrile to give the Pt(II) acetamidates [Pt(2,2′-bipy)(NHCOCH3)2] · 4.125 H2O (I) and [enPt(μ-NHCOCH3(μ-OH)Pten](NO3)2 · H2O (II), which are characterized by X-ray diffraction. The crystals of I are triclinic, a = 7.137(10) A, b = 12.655(3) A, c = 21.914(6) A, α = 81.82(2)°, β = 82.12(2)°, γ = 77.72(2)°, V = 1908.6(7) A3, space group P\(\overline 1 \), Z = 4, R = 0.033 for 3700 reflections. Complex I is a mononuclear acetamidate with terminal (NHCOCH3)− ligands. The crystals of II are monoclinic, a = 11.413(2) A, b = 10.981(2) A, c = 14.385(3) A, β = 105.90(3)°, V = 1733.8(6) A3, space group P21/n, R = 0.028 for 2797 reflections. Complex II is a dimer with bridging (NHCOCH3)− and (OH)− groups. The Pt-Pt distance is 3.1667(7) A.