Pour réviser : le tableau d avancement et la dissolution et

Electronic spectroscopy in multi d electron ions • in order to understand the spectroscopy of d ions with more than one d electron we must take the effect of e-- e-repulsion into account (we have ignored this so far) • each e-has spin and orbital angular but it is the interaction of the TOTAL RESULTANT spin and angular momentum

Dion’s Dress Code

Dion’s Dress Code Exemplifying Exceptional People Our vision is to be the most admired regional restaurant brand in the country Our dress code plays a substantial role in this vision

(d) In a TOF mass spectrometer the time of flight, t, of an

(d) In a TOF mass spectrometer the time of flight, t, of an ion is shown by the equation In this equation d is the length of the flight tube, m is the mass, in kg, of an ion and E is the kinetic energy of the ions In this spectrometer, the kinetic energy of an ion in the flight tube is 1 013 × 10− 13 J

Coordination Chemistry II: Ligand Field Theory Continued

Adding Metal Electrons e g e g * a1g a1g t1u t1u t2g Metal ions typically have some valence electrons that can be accommodated in the metal d orbitals •d0ions –Ti4+, Zr4+, V5+, Ta5+, Cr6+, Mo6+, etc

Free-Ion Terms to Ligand-field Terms Orbital term symbols for

Splitting of dn Free-ion Terms S, P, D, and F in O hD state , for which L = 2, is five-fold degenerate "Substituting L = 2 into the equations for the operations of Oh gives the following representation Oh E 8C3 6C2 6C4 3C2 i 6S4 8S6 3Fh 6Fd 'D 5 -1 1 -1 1 5 -1 -1 1 1 "This is identical to the reducible representation we obtained for d orbitals

Electronic Spectroscopy of Transition Metal Complexes

Let’s now consider d-orbitals in a tetrahedral complex: i e , an tetrahedral “Ligand Field” The 4 ligands are put on corners of cube (black dots below) Three d-orbitals are pointing right at the ligands (anti-bonding) Two d-orbitals are pointing in-between ligands (nonbonding) Antibonding d: Nonbonding d: How do we know t 2 or e

Crystal Field Splitting in an Octahedral Field

d4 There are two possibilities for metal ions having d 4-d7 electronic configuration Depending on the nature of the ligands and the metal they could be high-spin or low-2 u e spin complexes 4 u e For the d4 system, CFSE = For high-spin, (3 × 0 4) – (1 × 0 6) = 0 6 Δ o and for low-spin, 4 × 0 4 = 1 6 Δ o 2 0 Δ o 0 0 Δ2 4 Δ o 0 4 1

Tests didentification de Collège quelques ions

d’argent de formule chimique AgCl) qui confirme la présence des ions de chlorure Cl- Equation de formation de précipité : + → AgCl Remarque : L’ion d’argent est appelé ion détecteur des ions Cl- Solution de nitrate d’argent ( + ) : solution détectrice Tests d'identification de quelques ions

Homework , Graded Answers

d ) 3 NO 2 (g) + H 2 O(l) 2 HNO 3 (aq) + NO(g) 7 57) Determine whether each compound is soluble or insoluble For each soluble compound, identify the ions present in solution a ) NaC 2 H 3 O 2 = soluble, NaC 2 H 3 O 2 (aq) Na +(aq) + C 2 H 3 O-(aq) b ) Sn(NO 3) 2 = soluble, Sn(NO 3) 2 (aq) Sn 2+(aq) + 2 NO 3-(aq) c ) AgI = insoluble, AgI(s) d