Meso-mesityl dithia- and diselenarubyrins: existence of planar and inverted forms in solution

2002 
Syntheses, characterization and spectroscopic studies of meso-mesityl substituted rubyrins are reported. Specifically, it has been shown that these rubyrins behave differently from the meso-phenyl containing rubyrins in their structure. 1H NMR studies reveal the existence of both planar and inverted isomers in solution in different ratios both in the freebase and protonated forms.
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