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Figure 4
Example of a grid constructed around the terminal CHO group, consisting of points at the ρ = 10−6 a.u. electron-density contour surface of molecule (3) in the retinal set. The electrostatic potential (kJ mol−1), solely generated by the CHO group, is less than −50 (purple) or varies from −45 to −30 (orange), −30 to −25 (pink) or −25 to −10 (green).

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ISSN: 2053-2733
Volume 60| Part 5| August 2004| Pages 427-433
doi:10.1107/S0108767304016228
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