4-(Dimethylamino)phenyl ethynyl telluride

The title compound, C10H11NTe, is the first organyl ethynyl telluride, R—Te—C[triple-bond]C—H, to be structurally characterized. In the L-shaped molecule, the aryl moiety, viz. Me2NC6H4Te, is almost perpendicular to the Te—C[triple-bond]C—H fragment. The Te—Csp2 bond [2.115 (3) ] is significantly longer than the Te—Csp bond [2.041 (4) ]. The Te—C[triple-bond]C group is approximately linear [Te—C—C = 178.5 (4)° and C[triple-bond]C = 1.161 (5) ], while the coordination at the Te atom is angular [C—Te—C = 95.92 (14)°]. In the crystal structure, there are Csp—H...N hydrogen bonds which are perpendicular to the CNMe2 group; the N atom displays some degree of pyramidalization. Centrosymmetrically related pairs of molecules are linked by Te...π(aryl) interactions, with Te...Cg = 3.683 (4) and Csp—Te...Cg = 159.1 (2)° (Cg is the centroid of the benzene ring). These interactions lead to the formation of zigzag ribbons which run along c and are approximately parallel to (110).