Figure 1
The change in the electron density of α-oxalic acid dihydrate due to the X-ray constrained fitting procedure. Static electron density difference map between the constrained and the unconstrained Hartree–Fock wavefunctions. Copyright IUCr, from Grimwood & Jayatilaka (2001). Contours are in increments of 0.1 e Å−3, dashed lines are a decrease while solid lines are an increase. |