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Protonation of ruthenium acetylide complexes [M]-*C*CCPh2CH2CH=CH2 (2a, [M] = (eta5-C5H5)(P(OPh)3)(PPh3)Ru; 2a', [M] = (eta5-C5H5)(dppp)Ru; *C = 13C-labeled carbon atom) with HBF4 in ether produces(More)