Figure 1
A `photodifference' map showing the ground state (already modelled) depicted by the black lines together with the electron density associated with the light-induced [Ru(SO2)(NH2)4Cl]Cl complex (Kovalevsky et al., 2002, 2003). In this example, SO2 is the photoactive ligand, undergoing a η1-SO2 (end-on) to η2-SO2 (side-bound) photoisomerization. The S atom and one of the O atoms of the η2-SO2-bound ligand are evident in this Fourier difference map by the green peak and more diffuse green area, respectively, on the left of the figure (the other oxygen cannot be seen here as it lies out of the plane). |