The crystal structure of 10-acetonylphenoxatellurine nitrate,C15H13NO5Te

The crystal structure of C₁₅ H₁₃NO₅Te was determined from X-ray diffractometer data. The unit cell is triclinic (Bī): a = 17.118(5), b = 7.402(2), c = 12.225(2) Å, α = 87.96(1), β = 93.31 (1), γ = 92.13(2)° at 22°C, Z = 4/cell, and the conventional R = 0.025 for 2497 independent reflections. The molecule is folded along the Te-ring oxygen axis (135° ). The average Te-ring carbon distance is 2.101 Å, the Te-acetonyl carbon distance is 2.129 Å and the average C-ring oxygen distance is 1.388 Å. The acetonyl group and phenyl rings have normal distances and angles, and the nitrate group is nearly regular, with Te…ONO₂ = 2.775 Å. The coordination around Te is that of an extremely distorted trigonal bipyramid, with apical positions occupied by one ring carbon and the ONO₂ group (167.4°), and two axial positions occupied by the acetonyl carbon and the other ring carbon (94.6°). Coordinates of all hydrogen atoms were determined.