Synthesis and coordination chemistry of P(Te)-X ligands
L. Jeremias
One of the possible pathways to prepare metal tellurides is decomposition of single source
precursors, which are often coordination compounds of selected main group and transition
metals containing [R2P(Te)NP(Te)R2]-
ligands.1
The oxidation of R2PXPR2 compounds (X =
(CH2)n, NH, etc; R = alkyl, aryl) by elemental chalcogen leading to dichalcogeno
R2P(E)XP(E)R2 species (E = O, S and Se) has been well known for a long time,2,3
while
analogous reactions with elemental tellurium have been described first by our research group
in this year.4
The successful syntheses of Ph2P(Te)(CH2)nP(Te)Ph2 (n = 2-6) as well as EtPh2PTe and
Et2PhPTe ligands by direct oxidation of starting phosphorous compounds (Ph2P(CH2)nPPh2,
EtPh2P and Et2PhP, respectively) by elemental tellurium are reported. The reaction
conditions, X-ray structures of the compounds, NMR spectra (31
P and 125
Te) and comparison
with lighter chalcogen derivatives will be discussed in detail.
REFERENCES
1. Ritch J. S., Afzaal M., Chivers T., O’Brien P.: Chem. Soc. Rev. 36, 1622 (2007).
2. Dean P. A. W.: Can. J. Chem. 57, 754 (1979).
3. Bhattacharyya P., Novosad J., Phillips J., Slawin A. M. Z., Williams D. J., Woollins J. D.: J. Chem. Soc.
Dalton Trans., 1607 (1995).
4. Jeremias L., Babiak M., Kubát V., Calhorda M. J., Trávníček Z., Novosad J.: R. Soc. Chem. Adv. 4, 15428
(2014).