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The complex Cp*Rh(PMe 3 )PhH (Cp* = C 5 Me 5 ) reacts thermally with selenophene to give a C−Se insertion product. X-ray structural characterization shows a planar 6-membered ring containing a localized butadiene structure. 77 Se NMR studies display an upfield resonance consistent with a non-aromatic metallaselenabenzene ring.
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Vicic et al. (1997) studied this question.
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