An IR spectrum of p-cresol is acquired. Select the region of the spectrum where the C-O stretching band will most likely be found. 2800-3000 cm O 3200-3600 cm O 1460-1600 cm O 1150-1250 cm
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- When 0.075g of penicillamine is dissolved in 10.0 mL of pyridine and placed in a sample cell 10.0 cm in length, the observed rotation at 20 degrees (using the D line of sodium) is -0.47 degrees. Calculate the specific rotation of penicillamine. a. (-0.47)/[(0.075g/mL) (1.00 dm)]= -6.3 b. (0.47)/[(0.075g/mL) (1.00 dm)]= 6.3 c. (-0.47)/[(0.0075g/mL) (1.00 dm)]= -63 d. (0.47)/[(0.0075g/mL) (1.00 dm)]= 63Where would the stretching signal for the –OH of a carboxylic acid appear in an FTIR spectrum? a. 1650-1780 cm-1 b. 3200-3600 cm-1 c. 2500-3300 cm-1 d. 3100-3300 cm-1The following data was collected for this experiment: A sample of 0.8281 g of phenylsuccinic acid was dissolved in 10 mL of acetone. This sample gave a reading, aobs, of +10.278 deg on the polarimeter. A tube measuring 1 dm was used for the sample. What is the major enantiomer present in this sample? Calculate the concentration of the sample used in g/mL. Calculate the observed specific rotation [a]obs of the sample. Give your answer to 4 significant figures.
- Identify the frequency of both carbonyl stretches in your IR. Which one corresponds to the benzyl ester? Wavenumber (cm-1) Bond Vibration Shape Intensity Functional Group 3288.63 cm-1 N-H Stretch Sharp Weak Amine/Amide 3078.39 cm-1 C-H Stretch Sharp Weak Aromatic/Alkene 2976.16 cm-1 C-H Stretch Sharp Weak Alkane 1720.50 cm-1 C=O Stretch Sharp Medium Ester 1653.00 cm-1 C=O Stretch Sharp Medium Amide 1556.55 cm-1 C=C Stretch Sharp Medium Aromatic50 uL of an aqueous sample of double-stranded DNA is dissolved in 950 uL of water. This diluted solution has a maximal absorbance of 0.326 at 260 nm. What is the concentration of the original (more concentrated) DNA sample, expressed in ug/uL?Chemistry IR Analysis and H-NMR of Cyclopentylamine
- I need help calculating the binding constant and the free energy of binding Base Pairs – A & C 5 ml each Temperature, (°C) 25.00 [A], (M) 0.0441955 [C], (M) 0.0441955 [AC], (M) 0.00580452 Base Pairs – A & T 5 ml each Temperature, (°C) 25.00 [A], (M) 0.00163564 [T], (M) 0.00163564 [AT], (M) 0.0483644Does the exclusion rule apply to C2H4?identify and interpret the peaks and their characteristics (C=O, 4H, doublet) product name: dulcin (4-ethoxyphenylurea) (C9H12N2O2) images include CNMR, HNMR, and IR spectroscopy
- 2. Determine the Index of Hydrogen Deficiency of the following compounds:a. C8H7NOb. C4H4BrNO2Which of the following structures has the highest resolution? a. An X-ray structure with 3.0 Ǻ resolution b. An X-ray structure with 4.0 Ǻ resolution c. An X-ray structure with 1.5 Ǻ resolution d. An X-ray structure with 1.0 Ǻ resolution e. An NMR structure with 10 NOE’sHow do I assign E or Z configuration?