Question: (c) Infra-red analysis on the dimeric complex [(5Cp)2Os2(CO)4] shows a CO stretch at 2000cm1. Raman spectroscopy shows that an Os-Os bond is also present in

(c) Infra-red analysis on the dimeric complex [(5Cp)2Os2(CO)4] shows a CO stretch at 2000cm1. Raman spectroscopy shows that an Os-Os bond is also present in the structure. (i) Show that both metal centres in [(n5Cp)2Os2(CO)4] obey the 18 electron rule. 3marks (ii) Infra-red analysis on the dimeric complex [(n5Cp)2Ru2(CO)4] shows CO stretches at both 1800cm1 and 2000cm1. Raman spectroscopy shows that a Ru-Ru bond is also present in the structure. Draw both the cis and trans isomers for this complex. 4 marks

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