3- Pyridinium bromide perbromide is a lachrymator.What does that
mean? 4- Draw the four possible stereoisomers...
3- Pyridinium bromide perbromide is a lachrymator.What does that
mean? 4- Draw the four possible stereoisomers of
2,3-dibromo-3-phenylpropanoic acid and assign configurations to the
stereocenters.Indicate which pairs of stereoisomers are
enantiomers. 5- Draw the mechanism for the bromination of
trans-cinnamic acid, using Br2. a) Show both bromonium ions that
can form in the first step. b) Show the two additions to each of
the bromonium ions you drew in (a).You should have four structures.
c) Although you have four structures,...
4. Let A={(1,3),(2,4),(-4,-8),(3,9),(1,5),(3,6)}. The relation R
is defined on A as follows: For all (a, b),(c,...
4. Let A={(1,3),(2,4),(-4,-8),(3,9),(1,5),(3,6)}. The relation R
is defined on A as follows: For all (a, b),(c, d) ∈ A, (a, b) R (c,
d) ⇔ ad = bc . R is an equivalence relation. Find the distinct
equivalence classes of R.
Section B. For each question in this section, you are required
to list all possible candidate...
Section B. For each question in this section, you are required
to list all possible candidate keys for the given
schema based on the functional dependencies provided. You may wish
to compute the closure of
your key(s) to confirms they are valid.
Question 1
R [A, B, C, D, E, F, G, H, I, J]
{A} -> {B}
{C} -> {B}
{B} -> {D, E, F, G, H}
{D, F} -> {I, J, A}
Question 2
R [A, B, C,...
Draw an example structure for each of the following terms, and
provide the appropriate common name...
Draw an example structure for each of the following terms, and
provide the appropriate common name (not IUPAC) for each structure.
When stereochemical centers are present, show the naturally
occurring stereoisomer, most common on earth. Do not use “R” groups
in your structures. (10 points)
a. An alpha-amino acid with at least one chirality center
b. A nucleotide
c. A triglyceride (label each fatty acid chain as saturated,
mono-unsaturated, or polyunsaturated; an exact name is not needed
for this one)...
Use R to answer the following questions: This problem will use R
to find all possible...
Use R to answer the following questions: This problem will use R
to find all possible orderings of 7 objects and probabilities
associated with them. Consider your vector of possible values to
be: values = as.character(1:7) (a) Use the function sample to draw
from values 7 times (without replacement), and return this vector.
Notice it is a vector, with 7 values. Display your particular draw.
(b) Repeat (a) 100000 times using an sapply. Notice the result has
7 rows, and...
[A] List all the structural features (chains, rings, functional
groups, # of C's, rings, etc) the...
[A] List all the structural features (chains, rings, functional
groups, # of C's, rings, etc) the compound
5-Chloro-3-(2,2-DiChlorobutyl)CycloPentene has.
(Or, tell what each part of the compound's name is telling us, i.e.
what: (1) Di, (2) Chloro, (2) Butyl, (3) Cyclo, (4) Pent, (5) Ene
mean and (6) why the ()'s after the 3 are used?)
[B] In the name, what do the numbers: 2's, 3 & 5 tell
us?
[C] Why don't we need a number to indicate where...