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Electron Counting in Organometallic Complexes (Worksheet)

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Work in groups on these problems. You should try to answer the questions without referring to your textbook. If you get stuck, try asking another group for help.

Determine the number of electrons for each compound or complex below and whether you expect it to be stable:

\((\eta^6-C_6H_6)_2Fe\) \(Ru(PPh_3)_2(CO)_2\)
\(Cp_2NbH(C_2H_4)\) \([HFe(CO)_4]^-\)
\(Re(CO)_5\) \(Pt(PBu_3)_3\)
\(Cp(NO)_2W-H\) \((PrO)_3W=CMe_2\)
\([Cp(diphos)(CO)_2Mo]^+\) \([Cp(PhCCH)(CO)_2Fe]^+\)
\((\eta^6-C_6H_6)Mn(CO)_2CH_3\) \([Cp(CO)(NO)Mo(\eta^3-C_3H_3]^+\)
Vaska's compound: \(trans-Ir(PPh_3)_2(CO)Cl\) \(Cp(CO)_2Re(CH_3)_2\)
\(Cp*Ru(CO)_2Br\) \(CpRu(PPh_3)_2Cl\)
\([CpRu(PPh_3)_2]^+\) \([CpRu(PPh_3)_2(n-PrSH)]^+\)
\((NH_4)_2MoO_4\) \(Cp_2ZrCl(OMe)\)
\(Cp_2Ti(CO)_2\) \((Ph)_2Ni(PPh_3)_2\)
\(Mo(CO)_6\) \(PtCl_2I_2^{2-}\)
\([CpRu(CO)_2]_2\) \(Cp_2Mo(HCCH)\)
\(PdCl_2(NCCH_3)_2\) \(Mo(CO)_3(NCCH_3)_3\)
\(Cp \rightarrow \eta^5-C_5H_5^-\)  
\(Cp* \rightarrow \eta^5-C_5(CH_3)_5^-\)  
\(diphose \rightarrow Ph_2PCH_2CH_2PPh_2\)