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(PPh 4 ) 2 Te 4  has been prepared by the reaction of Na 2 Te 3  with PPh 4 Cl in DMF solution in the presence of MnCl 2  or FeCl 2 . The compound forms dark red crystals, which were characterized by IR spectroscopy as well as by an X-ray crystal structure determination (6109 observed independent reflections, R = 0.030). Crystal data: triclinic, space group PĪ, Z = 2, a = 1046.7(2), b = 1130.1(2), c = 1967.8(4) pm, α = 93.63(3), β = 90.43(3), γ = 108.89(3)° at —60 °C. The cations are grouped in pairs (PPh 4  + ) 2  around inversion centres, each pair being surrounded by eight Te 4  2-  ions, arranged as in the CsCl type lattice. The chain-like Te 4  2-  ions have no close contacts with one another.

Synthese und Kristallstruktur von (PPh 4 ) 2 Te 4 / Synthesis and Crystal Structure of (PPh 4 ) 2 Te 4