Crystal and molecular structures of two crystallographic modifications of trans-di-iodobis(dimethylphenylphosphine)palladium(II)
- 1 January 1968
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 2594-2605
- https://doi.org/10.1039/j19680002594
Abstract
X-Ray diffraction studies of the crystal structures of two forms of trans-di-iodobis(dimethylphenylphosphine) palladium(II) are summarised. Form I, crystallising as red needles, is orthorhombic with a= 8·79, b= 13·06, c= 17·82 Å; space group P212121. Palladium atoms are bridged by iodine atoms and two quite short intramolecular palladium–hydrogen interactions follow from the positioning of the phenyl rings on the phosphine ligands. Form II, crystallising as yellow plates, is monoclinic with a= 10·20, b= 10·71, c= 10·23 Å, β= 111·7°; space group P21/c. With two molecules in the unit cell, the complex is required to have precise Ci symmetry and octahedral co-ordination of the palladium is now achieved through intermolecular interactions with hydrogen atoms on the β-carbon atoms of the phenyl rings of the phosphine ligands.Keywords
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