Diamino-ligated platinum(II) and platinum(IV) phenoxide complexes; syntheses and crystal structures

The reaction of the diamino-ligated dimethylplatinum(II) complex [Pt(Me){2}(bpy)] (bpy=2, 2'-bipyridyl) with phenol affords the new complex [Pt(Me)(OPh)(bpy)] (1). The X-ray crystal structure of square-planar 1 is reported: orthorhombic, space group P2{1}2{1}2{1} (No. 19), a = 9.1625(12), b = 12.3922(12), c = 13.3181(13) @?9, Z = 4. Reaction of complex 1 with MeI or benzyl bromide affords the novel six-coordinate platinum(IV) aryloxide complexes [Pt(Me){2}(I)(OPh)(bpy)] (2) and [Pt(Me)(CH{2}Ph)(Br)(OPh)(bpy)] (3), respectively. The X-ray crystal structure of octahedral 2 is reported: monoclinic, space group P2{1}/c (No. 14), a = 10.0194(6), b = 10.5126(10), c = 17.6596(14) @?9, @b = 104.159(6)}o{, Z = 4. The iodide complex 2 exists as a mixture of two isomers in solution (the major one corresponds to that of trans oxidative addition), whereas the bromide complex 3 is found only as the trans oxidative addition product