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Palladium-dihalide complexes with carbonyl donors

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Summary

Palladium halides react with 4H-pyran-4-one (P) and 2,6-dimethyl-4H-pyran-4-one (DMP) to yield [Pd-(DMP)2X2] (X=Cl or Br), [Pd(P)2Cl2] and [Pd(P)Br2]n complexes which have been characterized by i.r. and proton n.m.r. spectroscopy. the thermal behaviour of the 4-pyrone adducts is correlated with that ofN,N-dimethylformamide analogues, [Pd(DMF)2Cl2] and [Pd(DMF)Br2]n, the ligand coordinating ability following the order: DMP>P>DMF. On the basis of i.r. spectra, the [Pd(L)2Cl2] (L-DMP or P) adducts should have the usualtrans configuration, whereas in both [Pd(P)Br2]n and [Pd(DMP)2Br2] a polymeric arrangement through bromine bridges should be present. The properties of the [Zn(P)2Cl2] and [Pt(DMP)2Cl2] complexes are also discussed.

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Fregona, D., Guo, Z., Faraglia, G. et al. Palladium-dihalide complexes with carbonyl donors. Transition Met. Chem. 17, 242–246 (1992). https://doi.org/10.1007/BF02910847

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