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The crystal and molecular structure of an adduct of styrene oxide and tetra-(2, 6-dichlorophenyl)porphyrinato(carbonyl)ruthenium(II) reveals co-ordination of the epoxide ring at 49° with respect to the mean porphyrin plane such that there are close non-bonded interactions between the oxirane protons and a porphyrin pyrrole ring and between the styrene oxide phenyl carbons and one chlorine.
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Groves et al. (1990) studied this question.
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