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9. Count the valence electrons on the central metal in the following complexes. Which obey the...

9. Count the valence electrons on the central metal in the following complexes. Which obey the 18 electron rule?   Fe(CO)4(PEt3), Ta(h5-C5H5)2Cl3, [Rh(bipy)2Cl]+, [Ni(CO)4]2-, cis-[PtCl2(NH3)2], trans-[IrCl(CO)(PPh3)2]  

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