(a) Determine the number of carbonyl ligands (n) in each of the following complexes when they obey the 18 electron (EAN) rule: (i) (ii) [Ru(n-C6H6)(CO)n [Fe(15-C5H5)(1²-C2H4)(CO)n]* (iii) [RU3(CO)n] (iv) [RU3(μ2-H)2(CO)n]

Consider the following reaction: [Cr(H2O)5(SCN)]2+  +  Yn-  -->  [Cr(H2O)5Y](3-n)+  +  SCN- Which statement is true if this reaction occurs via a dissociation mechanism? Group of answer choices Changing the incoming ligand, Yn-, will have a large effect on the rate constant. The first step of the mechanism is the addition of the Yn- ligand to form a 7-ccordinate intermediate, [Cr(H2O)5(SCN)Y](2-n)+ Changing the incoming ligand, Yn-, will have very little effect on the rate constant. It is impossible for this reaction to occur via a dissociation mechanism.

Compound Cis - [Co(NH,),CI,J Trans - [Co(NH),CI] Fac - [Co(NH),CI] Mer - [Co(NH,),Cl, Cis-[Co(en) Cl]+ (Remember, because en is a bidentate ligand it counts as two ligands each) Trans-[Co(en),C₁₂]* Cis-SCI₂F Trans-SCIF Fac-[RhCI,(pyr),] Mer - [RhCI, (pyr),] Fac - [Co(NH,),(H,O), Mer - [Co(NH,),(H,O), Drawing

A hypothetical metal M forms the following complexes with the generalized ligands X, Y, and Z:   Complex ion Observed color [M(X)6]3+ green [M(Y)6]3+ blue [M(Z)6]3+ yellow Order these ligands according to their ability to split d orbitals. In other words, set up a spectrochemical series, from strongest to weakest ligand field strength. Rank from strongest to weakest ligand field strength.    -X -Z -Y