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Figure 3
Residual density maps of the thymine ring. (a) classical multipolar refinement (CMR); (b) invariom-transfer model (ITM); (c) `mesomeric' invariom-transfer model (meso-ITM). Contours at 0.1 e Å−3; full lines: positive; dashed lines: zero; dotted lines: negative.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
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