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[TeCl 2 (NPMe 3 ) 2 ] 2  has been prepared by the reaction of TeCl 4  with Me 3 SiNPMe 3  in acetonitrile solution. Tlie compound forms white moisture sensitive crystals which have been characterized by IR spectroscopy and by a crystal structure determination. Space group P2 1 /c, Z = 2, structure solution with 3510 independent reflections, R = 0.029. Lattice dimensions at - 70 °C; a = 1206.0(9); b = 1054.7(7); c = 1156.0(6) pm; β = 99.27(5)°. [TeCl 2 (NPMe 3 ) 2 ] 2  forms centrosymmetric molecules via TeCl 2 Te bridges with bond lengths Te-Cl of 267.2 and 366.9 pm, the longer one being in trans-position to one of the terminally bounded (NPMe 3  - ) groups. The TeN bond lengths of 190.1 and 192.6 pm are unusually short.

Synthese und Kristallstruktur von [TeCl 2 (NPMe 3 ) 2 ] 2 / Synthesis and Crystal Structure of [TeCl 2 (NPMe 3 ) 2 ] 2