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Figure 1
Experimental bond lengths (Å) and angles (°) for the bi­pyridine species in (a) solid 2,2′-bi­pyridine (Merritt & Schroeder, 1956BB12; s.u.'s not given), (b) the 2,2′-pyridyl­pyridinium cation (Lipkowski et al., 1976BB10) and (c) the 2,2′-bipyridinium dication (present work).

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CHEMISTRY
ISSN: 2053-2296
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