Acta Cryst. (2001). E57, m576-m577  [ doi:10.1107/S1600536801018712 ]

Double cyclometallation of bis[3-(3-methoxyphenyl)pyrazol-1-yl]methane in a bis[(acetylacetonato)palladium(II)] complex

O. Juanes, J.-C. Rodriguez-Ubis and C. J. Pastor

Abstract: The cyclometallation of aryl and pyrazolyl rings yields the title bis[(acetylacetonato)palladium(II)] complex, {-bis[3-(3-methoxyphenyl)pyrazol-1-yl]methane}bis[(acetylacetonato)palladium(II)], [Pd₂(C₅H₇O₂)₂(C₂₁H₁₈N₄O₂)], with five- and six-membered chelate rings. The five-membered ring PdNCCC [Pd-C 1.980  (5)  Å and Pd-N 2.004  (3)  Å] is planar, whereas the six-membered ring PdNNCNC [Pd-C 1.966  (5)  Å and Pd-N 2.043  (4)  Å] has a boat conformation. The Pd-O(acac) distances clearly demonstrate a trans influence, the O atoms in trans positions with respect to carbon forming longer Pd-O bonds than those in trans positions to nitrogen [Pd-O 2.097  (3)  Å versus 2.010  (3)  Å for the Pd atom in the five-membered ring and 2.054  (3)  Å versus 1.984  (3)  Å for the Pd atom in the six-membered ring].

Online 10 November 2001

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