Synthesis and crystallographic characterization of cationic Pd(II) complexes containing bis(diphenylthiophosphinyl)methane

The reactions of PdCI2(L-L) [L-L = Ph2PCH2PPh2 (dppm), Ph2PCH2CH2PPh2 (dppe) and Ph2PCH2CH2CH2PPh2 (dppp)] with an equivalent amount of Ph2P(S)CH2P(S)Ph2 (dppmS2) gave the cationic complexes [Pd(L-L)(dppmS2)]2+ which were isolated as perchlorate salts [dppm (1), dppe (2) and dppp (3)]. The complexes 1 and 3 were crystallographically characterized. The coordination geometry around the Pd atoms in these complexes is distorted square planar. Both structures consist of puckered six-membered rings formed by coordination of the disulfide ligands via two sulphur atoms to the metal center. Complex 1 includes one molecule of acetone, [Pd(dppm)(dppmS2)](ClO4)2 · (CH3)2CO (1a).

The reactions of PdCI2(L-L) [L-L = Ph2PCH2PPh2 (dppm), Ph2PCH2CH2PPh2 (dppe) and Ph2PCH2CH2CH2PPh2 (dppp)] with an equivalent amount of Ph2P(S)CH2P(S)Ph2 (dppmS2) gave the cationic complexes [Pd(L-L)(dppmS2)]2+ which were isolated as perchlorate salts [dppm (1), dppe (2) and dppp (3)]. The complexes 1 and 3 were crystallographically characterized.Figure optionsDownload as PowerPoint slide