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Figure 3
Fourier difference maps for the restrained and constrained models, with all atoms defined in the structure. (a) The restrained N—O bond lengths with 0.02 Å standard deviation, (b) the restrained N—O bond lengths with 0.002 Å standard deviation, (c) the case where the Cl—C and N—C bond lengths are forced to be close to their standard values, and (d) the case where the N—O bond lengths are constrained to be close to their standard values. The Fourier difference maps for (a), (b) and (d) are similar. The Fourier difference map for (c) clearly shows the unaccounted and over-accounted for electron density. (Areas of high electron density are red in the electronic version of the paper and areas of low electron density are blue.)

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 64| Part 5| April 2008| Pages o296-o302
doi:10.1107/S0108270108008998
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