EBK ESSENTIAL ORGANIC CHEMISTRY
3rd Edition
ISBN: 9780100659469
Author: Bruice
Publisher: YUZU
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Chapter 18.4, Problem 6P
Interpretation Introduction
Interpretation:
The reason for why mannose is one of the products when glucose undergoes base-catalyzed isomerization in the absence of an enzyme whereas mannose is not formed in the presence of an enzyme catalyzed reaction has to be explained
Concept introduction:
- Enzyme is a protein that is a biological catalyst. The reactant in a reaction catalyzed by the enzyme is called substrate. In the enzyme, a pocket like cleft is present called active site where it binds the substrate.
- Some amino acid chains in the enzyme act as base, acid and nucleophilic catalyst. Many of the enzymes contain metal ions at the active site which acts as catalyst.
- Acid Catalyst helps in increasing the rate of a particular reaction by the donation of a proton to substrate.
- Base Catalyst helps in increasing the rate of a particular reaction by the removal of a proton to substrate.
- Nucleophilic catalysis helps in increasing the rate of a particular reaction by the formation of a covalent bond with substrate
- Glycolysis: A series of reactions where glucose is converted to two pyruvate molecules in the presence of enzymes catalysis.
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d) Determine the formal charge on the nitrogen atom in each of the structures.
NH3
NH2
N
C
бобкат
: N
N
H
H
Н
H2N-OH
A
B
C
D
E
F
G
Lewis Structure, Hybridization & Molecular Geometry
a) Draw the Lewis Structure of the molecules; Label the hybridization of each carbon atom;
Predict the approximate molecular geometry around each carbon atom.
CH3CHO
CH3CN
b) Draw the Lewis Structure of Nitromethane; Predict the approximate molecular geometry
around the nitrogen atom.
CH3NO2
c) Draw the Lewis Structure; Label the hybridization of the boron atom; Predict the
approximate molecular geometry.
BF3
BF4
a. The structure of the bicarbonate (hydrogen carbonate) ion, HCO3-, HCO3 " is
best described as a hybrid of several contributing resonance forms, two of which
are shown here.
HO
:0:
HO
+
:Ö:
Bicarbonate is crucial for the control of body pH (for example, blood pH
7.4). A more self-indulgent use is in baking soda, where it serves as a
source of CO2 CO2 gas, which gives bread and pastry their fluffy
constituency.
(i) Draw at least one additional resonance form.
=
(ii) Using curved "electron-pushing" arrows, show how these Lewis structures may
be interconverted by movement of electron pairs. (iii) Determine which form or
forms will be the major contributor(s) to the real structure of bicarbonate,
explaining your answer on the basis of the criteria in Section 1-5.
Chapter 18 Solutions
EBK ESSENTIAL ORGANIC CHEMISTRY
Ch. 18.1 - Prob. 1PCh. 18.2 - If H218O were used to hydrolyze lysozyme, which...Ch. 18.3 - Which of the following amino acid side chains can...Ch. 18.3 - Arginine and lysine side chains fit into trypsins...Ch. 18.4 - Which of the following amino acid side chains can...Ch. 18.4 - Prob. 6PCh. 18.5 - Prob. 7PCh. 18.5 - Draw the mechanism for the hydroxide-ion-catalyzed...Ch. 18.5 - What advantage does the enzyme gain by forming an...Ch. 18.7 - Prob. 10P
Ch. 18.7 - Prob. 11PCh. 18.8 - How many conjugated double bonds are there in a....Ch. 18.8 - Instead of adding to the 4a-position and...Ch. 18.8 - In succinate dehydrogenase, FAD is covalently...Ch. 18.8 - Prob. 15PCh. 18.9 - Acetolactate synthase is another TPP-requiring...Ch. 18.9 - Acetolactate synthase can also transfer the acyl...Ch. 18.9 - Prob. 18PCh. 18.9 - Prob. 19PCh. 18.10 - Prob. 21PCh. 18.11 - Prob. 23PCh. 18.11 - Which compound is more easily decarboxylated?Ch. 18.11 - Explain why the ability of PLP to catalyze an...Ch. 18.11 - Explain why the ability of PLP to catalyze an...Ch. 18.12 - What groups are interchanged in the following...Ch. 18.13 - Why is the coenzyme called tetrahydrofolate?Ch. 18.13 - What amino acid is formed by the following...Ch. 18.13 - How do the structures of tetrahydrofolate and...Ch. 18.13 - What is the source of the methyl group in...Ch. 18 - Prob. 32PCh. 18 - Prob. 33PCh. 18 - From what vitamins are the following coenzymes...Ch. 18 - Prob. 35PCh. 18 - For each of the following reaction, name both the...Ch. 18 - Explain why serine proteases do not catalyze...Ch. 18 - Prob. 38PCh. 18 - For each of the following enzyme catalyzed...Ch. 18 - Trisephosphate isomerase (TIM) catalyzes the...Ch. 18 - Prob. 41PCh. 18 - What acyl groups have we seen transferred by...Ch. 18 - When UMP is dissolved in T2O, exchange of T for H...Ch. 18 - Prob. 44PCh. 18 - When transaminated, the three branched-chain amino...Ch. 18 - Aldolase shows no activity if it is incubated with...
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