a)
Interpretation:
The IUPAC name of the compound represented by the model shown is to be given.
Concept introduction:
The names of simple carboxylic acids which are derivatives of open-chain
To give:
The IUPAC name of the compound represented by the model shown.
Answer to Problem 17VC
The IUPAC name is 3-bromo-4-methoxybenzoic acid.
Explanation of Solution
The compound represented by the model is
It is a benzoic acid derivative with a bromine atom on C3 and a methoxyl group on C4.
The IUPAC name of the compound represented by the model shown is 3-bromo-4-methoxybenzoic acid.
b)
Interpretation:
The IUPAC name of the compound represented by the model shown is to be given.
Concept introduction:
The names of simple carboxylic acids which are derivatives of open-chain alkanes are arrived by replacing the terminal –e of the corresponding alkane name by –oic acid. The numbering starts from carboxyl carbon. Compounds with –COOH bonded to a ring are named using the suffix-carboxylic acid. The –COOH carbon in this case is not numbered as C1, instead the carbon to which it is attached is numbered as C1. As a substituent, the –COOH group is called as carboxyl group.
To give:
The IUPAC name of the compound represented by the model shown.
Answer to Problem 17VC
The IUPAC name of the compound represented by the model shown is 3-methyl-2-butenoic acid.
Explanation of Solution
The compound represented by the model is
The compound is an unsaturated acid having a four carbon straight chain with a double bond between C2 and C3.
The IUPAC name of the compound represented by the model shown is 3-methyl-2-butenoic acid.
c)
Interpretation:
The IUPAC name of the compound represented by the model shown is to be given.
Concept introduction:
The names of simple carboxylic acids which are derivatives of open-chain alkanes are arrived by replacing the terminal –e of the corresponding alkane name by –oic acid. The numbering starts from carboxyl carbon. Compounds with –COOH bonded to a ring are named using the suffix-carboxylic acid. The –COOH carbon in this case is not numbered as C1, instead the carbon to which it is attached is numbered as C1. As a substituent, the –COOH group is called as carboxyl group.
To give:
The IUPAC name of the compound represented by the model shown.
Answer to Problem 17VC
The IUPAC name of the compound represented by the model shown is cyclopenta-1,3-dienecarboxylic acid.
Explanation of Solution
The compound represented by the model is
The compound has a cyclopentadiene ring to which a carboxyl group is attached. The double bonds in the diene are in between C1 & C2 and C3 & C4.
The IUPAC name of the compound represented by the model shown is cyclopenta-1,3-dienecarboxylic acid.
d)
Interpretation:
The IUPAC name of the compound represented by the model shown is to be given.
Concept introduction:
The names of simple carboxylic acids which are derivatives of open-chain alkanes are arrived by replacing the terminal –e of the corresponding alkane name by –oic acid. The numbering starts from carboxyl carbon. Compounds with –COOH bonded to a ring are named using the suffix-carboxylic acid. The –COOH carbon in this case is not numbered as C1, instead the carbon to which it is attached is numbered as C1. As a substituent, the –COOH group is called as carboxyl group.
To give:
The IUPAC name of the compound represented by the model shown.
Answer to Problem 17VC
The IUPAC name of the compound represented by the model shown is (S)-3-cyclopentyl-2-methylpropanoic acid.
Explanation of Solution
The compound represented by the model is
The compound is a carboxylic acid with a three carbon straight chin and has a methyl group attached to C2 and cyclopentyl group attached to C3. The compound is optically active as C2 is chiral. The groups of first highest, second highest and third highest groups when viewed away from the group of last priority are arranged in the anti-clockwise direction. Hence the compound has S stereochemistry.
The IUPAC name of the compound represented by the model shown is (S)-3-cyclopentyl-2-methylpropanoic acid.
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- d. In Figure 4, each stationary phase shows some negative correlation between plate count and retention factor. In other words, as k' increases, N decreases. Explain this relationship between k' and N. Plate Count (N) 4000 3500 2500 2000 1500 1000 Figure 4. Column efficiency (N) vs retention factor (k') for 22 nonionizable solutes on FMS (red), PGC (black), and COZ (green). 3000 Eluent compositions (acetonitrile/water, A/W) were adjusted to obtain k' less than 15, which was achieved for most solutes as follows: FMS (30/70 A/W), PGC (60/40), COZ (80/20). Slightly different compositions were used for the most highly retained solutes. All columns were 50 mm × 4.6 mm id and packed with 5 um particles, except for COZ, which was packed with 3 um particles. All other chromatographic conditions were constant: column length 5 cm, column j.§. 4.6 mm, flow rate 2 mL/min, column temperature 40 °C, and injection volume 0.5 μL Log(k'x/K'ethylbenzene) FMS 1.5 1.0 0.5 0.0 ཐྭ ཋ ཤྩ བྷྲ ; 500 0 5 10…arrow_forwardf. Predict how the van Deemter curve in Figure 7 would change if the temperature were raised from 40 °C to 55 °C. Figure 7. van Desmter curves in reduced coordinates for four nitroalkane homologues (nitropropane, black; nitrobutane, red; nitropentane, blue; and nitrohexane, green) separated on the FMS phase. Chromatographic conditions: column dimensions 50 mm × 4.6 mm id, eluent 30/70 ACN/water, flow rates 0.2-5.0 mL/min, injection volume 0.5 and column temperature 40 °C. No corrections to the plate heights have been made to account for extracolumn dispersion. Reduced Plate Height (h) ° 20 40 60 Reduced Velocity (v) 8. (2) A water sample is analyzed for traces of benzene using headspace analysis. The sample and standard are spiked with a fixed amount of toluene as an internal standard. The following data are obtained: Ppb benzene Peak area benzene Peak area toluene 10.0 252 376 Sample 533 368 What is the concentration of benzene in the sample?arrow_forwardLiquid chromatography has been used to track the concentration of remdesivir (a broad-spectrum antiviral drug, structure shown at right) in COVID patients undergoing experimental treatments. Intensity The authors provide the following details regarding standard solutions preparation: HN CN HO OH NH2 Remdesivir (RDV) stock solution (5000 µg/mL) was prepared by dissolving RDV drug powder using the mixture of DMSO: MeOH (30:70 v/v). The RDV working standard solutions for calibration and quality controls were prepared using methanol in concentrations of 100, 10, 1, 0.1, 0.01 µg/mL. 1, 2.5, 5, 7.5, 10, 25, 50, 75, 100, 250, 500, 1000, and 5000 ng/mL sample solutions were prepared freshly by spiking calibration standard solutions into the blank human plasma samples for method calibration. a) What type of calibration method is being described? Why do you think the authors chose this method as opposed to another? b) Based on the details provided in part a, describe an appropriate method blank…arrow_forward
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Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage Learning