The crystal structure of phenoxatellurine, C12H8OTe, was determined by X‐ray diffracto‐meter methods. The crystals are orthorhorhorhombic, P21 21 21, a = 6.036(1), b = 8.160(1), c = 20.717(5) Å at t = 22°. The positions of all atoms, including hydrogen, were found. The central ring is folded along the Te‐O axis (138°). Average bond distances are Te‐C = 2.098, C‐O = 1.397, C‐C = 1.382 Å. The phenyl rings are planar with a dihedral angle of 145°; C‐Te‐C = 89.4(3)°, C‐O‐C = 121.2(5)°. The structure is compared to those of phenoxathionine and pheuothiazine.

Bisphenoxatelluronium dinitrate is monoelinie, P21/c: a = 11.638(4), b = 28.266(8), c = 8.546(3) å, β = 119.73(2)°, z = 4 at t = 22°. All atoms including hydrogen were located. The two ring systems, I and II, are folded along their Te‐O axes, 147° and 163°, respectively. The average ring bond distances are: Te‐C = 2.091, C‐C = 1.377, C‐O = 1.370 Å. Each Te is bonded to one NO3 group, Te1‐ON1 = 2.485(5), Te2‐ON4 = 2.393(4) Å, and an oxygen bridge connects the ring systems, Te1‐OB = 1.966(4), Te2‐OB = 2.001(4) Å, Te1‐OB‐Te2 = 125.0(2)°. The bond distances and angles of the structure are compared to those of related compounds.

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