Figure 1.

(a) Structure of the [CpTi(cot)] complex (white, hydrogen; light brown, carbon; gray, titanium) with the plot of the computed SOMO d_z² orbital. The orbital surfaces are drawn for a value of 0.05 e bohr^–3. (b) STM image of a monolayer of [CpTi(cot)] on Au(111), V_b= +2 V, I_t = 20pA. (c, d) Close-up view of the area marked in panel b. Empty state STM images recorded in constant current mode, I_t = 20 pA, with a bias voltage, V_b, of +2 V (c) and +1 V (d). Dotted lines mark the step edge as a guide to the eye; black triangles indicate two bright rows (A and B) showing different STM height contrasts and periodicity.