1)What are the masses of the charged fragments produced by alpha cleavage of the following? (2 points)
1. (0.5 point each) What are the masses of the charged fragments produced in the following cleavage pathways? a. Alpha cleavage of 2-pentanone (CH3COCH,CH,CH3) b. Dehydration of cyclohexanol (hydroxycyclohexane) OH C. McLafferty rearrangement of 4-methyl-2-pentanone (CH3COCH2CH(CH3)2) d. Alpha cleavage of trimethylamine ((CH3)2N) H₃C N-CH3 H2C
Select all appropriate alpha cleavage MS fragments with respect to the nitrogen) that would exhibit resonance stabilization for the following molecule: You must select all options that are correct. qoo fool "
1) Answer the questions about the 2-hexanone. a) When bombarded with electrons in EIMS, what is the most likely (most stable) radical cation that is formed? b) From this radical cation, two alpha cleavage reactions are likely. Draw the mechanism of both and predict the fragments c) In addition to alpha cleavage, this molecule can also undergo a McLafferty rearrangement mechanism to predict the fragments . Drawa
1. How many fragments were
produced?
2. What is the size of the fragments?
Custom Digest NEW ENGLAND Print Close BioLabs NEBcutter unnamed sequence - digested with: Alul mment Gel Type: DNA Type: Unmethylated Marker: 1% agarose Lambda - Hindll Digest L=102 mm OK Length (bp) Ends Coordinates narker 1| (LeftEnd)-Alul 1-167 2Alul-(RightEnd) 217-308 3 Alul-Alul 167 92 49 10000 168-216 5000 1000 500 100
do alpha allylic cleavage fragmentation of
5,5 dimethylhexen-1-ol and determine the ion mass of the product
formed
also give reason for the stability of the product formed
6) Predict a-allylic cleavage fragmentation of 5,5-dimethylhexene-1-ol and determine ion fragment mass. Why is it stable?
1. Show the structure of the positively charged species that appear in the electron impact mass spectrum (El) of the following ester. HINT: Answers B-E are fragments that result from the indicated processes, and multiple different structures may be possible. A. [M]+ B. a-cleavage C. acylium ion D. carbocation(s) E. McLafferty
1. Show the structure of the positively charged species that appear in the electron impact mass spectrum (EI) of the following ester. HINT: Answers B-E are fragments that result from the indicated processes, and multiple different structures may be possible. Mon A. [M]+ B. a-cleavage C. acylium ion D. carbocation(s) E. McLafferty
Show the output produced by each of the following program fragments. Assume that I, j, k are int variables i = 7; j = 2; printf(“%d %d ”, i / j, i % j); i = 4; j = 3; printf(“%d”, (i + 10 ) % j); i = 7; j = 8; k = 9; printf("%d”, (i + 10) % k / j); Show the output produced by each of the following program fragments. Assume that I, j, k...
Look up the necessary masses and a. Show that 9Be is stable against beta decay but allowed to alpha decay b. What is the reaction for alpha decay? c. What is the energy release in this reaction?
Look up the necessary masses and a. Show that 9Be is stable against beta decay but allowed to alpha decay b. What is the reaction for alpha decay? c. What is the energy release in this reaction?