Reaction of Ph2P(CH2)nPPh2 (n = 1, 3, 5) with elemental tellurium and comparison with members of even-numbered series

• Two new compounds Ph2P(Te)(CH2)nP(Te)Ph2 (n = 3, 5) were isolated and characterized.
• Rapid exchange of tellurium atoms between PCP ligands was observed in solution.
• Activation energies of this process were determined for three different solvents.

The oxidation of Ph2P(CH2)nPPh2 (n = 1, 3, 5) by tellurium powder was studied. The prepared compounds Ph2P(Te)(CH2)nP(Te)Ph2 (1, n = 3; 2, n = 5) were characterized by 31P and 125Te NMR spectroscopy, elemental analysis, FTIR spectroscopy and for 2 by single-crystal X-ray analysis.

The possibility of oxidation of Ph2P(CH2)nPPh2 (n = 1, 3, 5) by elemental tellurium was studied. Two new compounds Ph2P(Te)(CH2)3P(Te)Ph2 and Ph2P(Te)(CH2)5P(Te)Ph2 were characterized by 31P and 125Te NMR spectroscopy, elemental analysis, FTIR spectroscopy and the latter by single-crystal X-ray analysis.Figure optionsDownload as PowerPoint slide