Exercise How many chiral centers are evident in the structure of cholesterol? Identify them by the number of the carbon atom. Exercise The work of the German chemist Wislicenus on hydroxypropanoic acids was influential in the development of van't Hoff's ideas on stereoisomerism.
Isomer A was isolated from sour milk and Isomer B from a meat extract. Both A and B had the same physical properties, except for optical rotation, wherein A was levorotatory and B was dextrorotatory. Isomer C was not optically active and had considerably different physical and chemical properties from A or B. Work out structures A, B, and C in as much detail as you can from the information given. Are these substances chiral or achiral? Exercise Draw the staggered conformations of each of the following compounds using the indicated convention:.
Exercise Draw the conformation of 2,2,5,5-tetramethylhexane that you expect to be of lowest energy. Exercise Draw a staggered conformation in both the sawhorse and Newman representations that corresponds to the configurations shown in the projection formulas a-c.
Exercise Draw projection formulas that correspond to the specific configurations shown in the following structures:.
Exercise This exercise can clarify for you the constraints on manipulating projection formulas. You will be helped by checking the configuration with models, as in Figure The idea is to determine what effect there is, if any, on the configuration represented by the formula by making various changes in the projection. Your answer for each part should be that the operation changes, or does not change, the configuration. Exercise Analysis of the crystals of a particular tartaric acid show them to be made up of equal amounts of the following conformations:.
Use ball-and-stick models to determine the relationship between these two conformations and also whether this tartaric acid is meso -tartaric acid, an optically active tartaric acid, or racemic acid.
Give your reasoning. Exercise Write structures for all the configurations possible for 2,4-dibromopentane. Which stereoisomers are enantiomers? Which are diastereomers? What combination of isomers would give a racemic mixture? Which isomer is achiral? Exercise From the compounds listed select all those that may have achiral meso configurations and draw the configurations for each of them. Exercise Look carefully at each pair of structures shown below and decide whether they are identical.
If you are uncertain, use molecular models. Exercise The two structures shown in each of the following pairs are isomers. Determine whether they are position, configurational, or conformational isomers. Use of models will be very helpful. Exercise Which of the following compounds could exist as cis-trans configurational isomers?
Exercise Which of the following compounds can exist as 1 a pair of enantiomers, 2 a pair of cis-trans isomers, and 3 as a cis pair of enantiomers and a trans pair of enantiomers? Exercise Write structures showing the specified configurations for each of the following compounds.
Make your drawings as clear as possible so there is no ambiguity as to structure or configuration:. Exercise Write structural formulas showing configuration for all of the possible cis-trans isomers of the following compounds:. Exercise Would you expect cis- or trans -1,2-dimethylcyclopropane to be the more stable?
Exercise Draw suitable formulas for all of the position and configurational isomers possible include optical isomers but not conformational isomers for the following compounds of molecular formula:. Exercise Show how the sawhorse and Newman conventions can be used to represent the different possible staggered conformations of the following substances:. Exercise Determine which of the following compounds are chiral and which are achiral. Exercise Write structures that fit the following descriptions:.
Q: A 0,g sample of lime CaO is dissolved in enough water to make mL of solution. A: As per our guidelines we can solve only first question please resubmit other questions as next quest Q: The rate constant of a chemical reaction is found to triple when the temperature is raised from 24 o Q: How can we use Chemical Thermodynamics to explain different processes involving entropy?
A: Entropy : It is the measure of the total randomness of the molecules or molecular disorder in a sys A: Cell notation is a shorthand method of describing a galvanic cell. Given: Shorthand notation Q: A gas-filled weather balloon with a volume of A: The detail solution for this reactions is provided below in attach image. A solution of zinc nitrate is added to a solution of magnesium sulfate.
You make 1. Q: b Consider the following organic compounds. A: The equilibrium constant, Keq is the ratio of the concentration of products to concentration of re A: Introduction: As we know that the Michael Faraday described the quantitative aspects of Electrolysis A: Since you have posted questions with multiple subparts, we will solve the first three sub parts for Q: Write reactions of 3-methylpentanoic acid with the following reagents: a.
Q: Mixing 2. Molarity of Q: Complete the following equation. State y Q: Write nuclear equations for the following bombardment reactions. Platinum is bombarded by a d Compound A reacts with c A: Since ozonolysis of A gives methanol gives methanal and 3,3-dimethylbutanal: So, the compound A is Q: Discuss the different separation techniques. Sieving Paper Chromatography Evaporation. A: Sieving It is a physical separation method.
It is used to separate mixtures that contain particles o Provide a structure for products a and b. A: Alkyl halide reacts with sodium ethoxide to form an alkene. A: In combustion reaction, a chemical compound reacts with an oxidizing agent to produce new products w Q: Please show me how to solve number Q: calculate the pH of the solution obtained by titrating ml of 0.
A: Applying concept of PH determination. A: The question is based on the concept of chemical equilibrium. Calculate the molar solubility of silver phosphate, Ag:PO.
A: a Silver phosphate ionizes in pure water to form silver and phosphate ions. Write the equation of Q: What evidence of a chemical reaction might you see in the following cases? Q: What is the de Broglie wavelength of a beam of protons traveling at 2. A: According to wave-particle duality, the De Broglie wavelength is a wavelength manifested in all the Q: The complete orbital notation diagram of an atom is shown.
Based on the diagram, what values can be A: Quantum numbers are the hypothetical numbers used to designate the location of of electron in an ato Q: a The Ecell for the following electrochemical cell is is 0. A: We know from cell representation we can find the oxidation and reduction reaction. We also know tha Q: Please help me to find the type of reaction in b,c. A: b : In reaction b , benzaldehyde reacts with ketone group of the reactant to form a conjugate e A: To solve this problem we have to use the relationship between Kelvin temperature to degree Celsius t Q: Consider a mL of 0.
A: Dilution of the solution: On dilution of the solution with the pure water, the mole of solute remain
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