quiz6key - . Quiz 6 S343 Summer 2008 key Name 1. (213:5)...

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Unformatted text preview: . Quiz 6 S343 Summer 2008 key Name 1. (213:5) What is the difference between a parent (molecular) peak and a base peak on the tr ? . .Lz? massjptigc um naggiwi radix/K ” EEPUIiti l0 int/$1.95 {Ji' mafia”- “H 5516‘? flight; A ‘ VflOE’siL t-lifitufilawf chlyé 2. (1 pt) What is the advantage of high resolution mass spectrometry over regular spectrometry? (Be specific.) 'i i Cleft/i fi'hfiflfif’ 1476155 (1.9477(7/ or} comm" MW 97f53710-‘4’L3‘ 3. (3pts) Use the rule of 13 to come up with 3 likely formulas that fit M+ = 102. C‘ p a 5,3? 0059.103? . ' - 7 I I, C: 6‘; II ‘3' f" " a- . _ - - ,fl _. . t ‘I m“ on" W: i=5 1 C (D Hr! Air/f0 ~12 (if (a j) I. 4. (4pts) Provide mechanisms to account for the fragments seen in the mass spectrum of these compounds. .i-u'u. 5. (10pts) The mass spectrum of an unknown compound was taken and it is shown below. Refer to the spectrum to answer the questions below: IUL'I - -—-— 44 DO \ 15 U ‘H M: :11 '3 Relat'ne abundance E o LATIng Tamil i. E} Ell 40 l-aU 8H Illtl IJL} I-lll mf/ A. The M+ peak is 121. What does that mean about this unknown, besides the fact that its molecular weight is about 121 amu? _ C/éllfl Kl/Ll ‘ H ‘5 J' i; M B. The compound most likely does not contain chlorine. Explain how you-know this: .. ,_ . I _- _ *2 _ _ ' ' I No M ' t 2 FEM at l :1 3“- WEH": :7 a fit» Lib-m t if hill " W +0 {V} l" {053? 3‘ T49 C. Draw the structure of the group indicated by the peak at m/z = 91. 4r / C [Pr-7, ' Jr -/ I k“ In“ ill-1m R/ ) j ~ III/‘41”! “ME-- I, I D. What two situations lead to an even-mass fragment such as the one at 44 amu’? Which one is more liker in this case? Explain how you chose this to be the more likely case. m mmfiwl‘f C/d-x'lthxn :4 o o i N at CLzflt’; / l" £7" at NUT/l mitt/l 7L ,1 «'rl /\ M (r ,fl Gali ié bl Cal-t1) 4:3 1 d ‘33 Flo L Wain/.3 .fl-iszC/f -' -— ...
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This note was uploaded on 01/18/2012 for the course CHEM S343 taught by Professor Benburlingham during the Summer '11 term at Indiana.

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quiz6key - . Quiz 6 S343 Summer 2008 key Name 1. (213:5)...

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