Crystal structures of diammine(oxalato)platinum(II)and diammine(malonato)platinum(II)
1985; Elsevier BV; Volume: 108; Issue: 1 Linguagem: Inglês
10.1016/s0020-1693(00)84314-5
ISSN1873-3255
AutoresF.D. Rochon, R. Melanson, Jean-Pierre Macquet, F. Bélanger-Gariépy, André L. Beauchamp,
Tópico(s)Ferrocene Chemistry and Applications
Resumo[Pt(NH3)2malonate] belongs to the monoclinic space group P1/c, a = 4.063(2), b = 14.150(2), c = 11.414(2) Å, β = 93.27(2)°, Z = 4. The structure was refined on 1274 nonzero CuKα reflections to R = 0.035. The crystal contains individual square planar molecules with two cis NH3 ligands at 2.036(9) Å from Pt. The Pt-O distances to the bidentate malonate average 2.022(6) Å and the chelate ring has a boat conformation. The angles around Pt lie in the range 86.0–93.5° (σ = 0.3°). The molecules are stacked along the a axis and form NH⋯O bonds with adjacent molecules. [Pt(NH3)2oxalate] is monoclinic, space group P21/m, a = 3.865(2), b =10.703(4), c = 6.774(3) Å, β = 94.29(4)°. Z = 2. The structure was refined on 449 non-zero MoKα reflections to R = 0.045. The square planar monomeric molecule possesses a crystallographic mirror plane perpendicular to the coordination plane and bisecting the N-Pt-N and O-Pt-O angles. The oxalate imposes an O-Pt-O angle of 82.0° in the chelate ring. The molecules are stacked in columns in the a direction, and form inter-column hydrogen bond in the b and c directions.
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