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Problem_Set_8_Key_Revised

Problem_Set_8_Key_Revised - 50"{fan Scfi Chemistry...

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Unformatted text preview: 50/" {fan Scfi Chemistry 2070 Assignment 8 Due: Friday, November 21 @2:00pm Name Lab TA Lab DayfI‘ime ' 7 1. Draw all the stereoisomers of (a) Co(ox)(NH3); and (b) Co(en)(NI—[3)2C12+ ; where ox = oxalate (0204’). and en = ethylene diamine (NHzczl-LNl-lz). Indicate which isomers are enantiomers of each other. . 7 y_ d) o 7" L) mu 7‘ I ‘1‘" a _8— o CE l I ,. (VH3 ' cl “C5. -' ”"3. énonlla'amr'5 MC nun“. "I ;Co__c' ‘ I, is ’ ' - a m [.5 CI ”"3 3 m, 7-3- I no em... lam" (‘ m I ”Ly—erCf fill-"0r I‘majc. fnilfoff) '"C- [Ed 57..;o;./ya$n J’WIH'M/prst.‘ (\ ”a: 74.. l 6| . ’ minor- fm‘jc- . . IFM'ML Ipl w Z'C'o'w 5‘79r'r""/"“9n he ”"5”” fiver ‘llmb 1‘ 6| ””3 fir l'tJet-{téltb ”9 ’1’?” Lina-ls, ho “q". lmmcf’ 2. The complex Co(NH3),Cl’* is octahedral only in an approximate sense , because NH3 and Cl' have different ligand-field strengths. How would you modify the d-orbital energy levels of Co(NH3)63+ in formulating a splitting diagram for Co(NH_-,),Clz*. (Place the Cl' ligand along z—axis of your Cartesian coordinate system). How many d-d transitions are possible in the two complexes? Apply your theory to explain why Comm)? is yellow (absorbs 430 nm light), whereas Co(NH3,)5Cl2+ is purple (absorbs 530 nm light). 3‘ J c l- C: J31 Mai" ' n “at" 3 M" are '3‘ as V ‘50:? fiwfls 3}, a Tl 4L {L 3-0.9 4/ l 4,3 2 i T EL *‘ 2’ "5 ”“3 134;, one. +ffln§llJ;'”' [firltk (1‘5” Vila-r)? 0131’ f1) @9/ 9i)”; 2: 3 Predict which of the two complexes" "1 the following pairs will have the: lower energy d- (1 transition In each case give a one line rationale a)Co(NH3)5(N02)2*[email protected] ”a; 54m,“ 7K U Ajamj b)_oCo(NH3)5c11+ @C 31,5}, L» m ”H,“ sit-{k 7%": (GI C) PICI‘z-o. 1" “190$" O/anj flur- C, 3 " 3 4.. d.r “(317)63— CD .5 War/L. :- If». flI-n If e)Cg(CN),H201-ol" Wig 19ml M." 1gp 1+ :4- f)-0r CKNHQEZ+ V A05 [flu/ff (7ft! L!- flm: [trc L‘QC— filth (V @r RhCl: JT 4 do a I! 9 (5:. Lela. (791"! / 4. Use crystal field theory to calculate the number of unpaired electrons in each of the following complexes. a)Mn£C142' Jr 4-4:,‘44- hill/I 5,}:1 fun/aimle— ‘ 'rr 2 rtJflV’J b) MIECN)‘; J“ 44' 4. 4 low 9"“ - III-Fm J l #4— 4- ' ('r rm -' cmfinf (tetrahedral) J’ 4L4» 297""! cl 1’ s d) RJNHS)? J 5. 41:1“, *4— /5w 7; ha lump-heel rim Inn-5 1L 4— _— . 6) Coating" J low if"! - {unfit-r If e f a"! __ g)PdC14" (tetrahedral) J 3 flgtfik 9. urn/J J c, 48 —~ h) Pt(NH,)2Cl2 (square planar) a, 0 fin/’0'“ J ch 95 ...
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