The reaction of [Rh(coe) 2 Cl] 2 (coe = cis-cyclooctene), bis(oxazolinyl)pyridine (pybox), and diynes (O(CH 2 C⋮CCO 2 Me) 2 and PhC⋮CCH 2 OCH 2 C⋮CCO 2 Me) gave new types of metallacycle complexes, which were analyzed by X-ray crystallography and showed catalytic activity for cycloaddition of diynes and several alkynes.
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Nishiyama et al. (2002) studied this question.
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