28. A compound has the chemical formula of CsH3O. Its IR shows absorptions at 3300 (sharp),...
4. Answer the following questions. a. A cyclic compound with molecular formula CsHsO, shows absorptions at 1720 cm-1 and at 2980 cm / on the IR spectrum. Propose a possible structure for this compound. b. A compound with molecular formula CH,N shows two significant bands in the 3300-3500 cm., and another at 2950 cmon the IR spectrum. Propose a possible structure for this compound.
Identify the compound A (C5H10O) with the proton NMR spectrum shown. Compound A has IR absorptions at 3200�3600 cm�1 (strong, broad), 1676 cm�1 (weak), and 965 cm�1, and also has 13C NMR absorptions (attached protons in parentheses) at ? 17.5 (3), ? 23.3 (3), ? 68.8 (1), ? 125.5 (1), and ? 135.5 (1). Compound A may be resolved into enantiomers; draw one molecule of A, omitting wedge/dash bonds.
Deduce a possible structure for the compound with the IR absorptions below. C3H5N: <3000, 2250 cm-1
-CH₂- VIII. BONUS. A molecule with the formula C6H10 has three singlets at 0 14 (6H), 2.45 (1H), and 3.3 (3H). The IR shows two distinctive peaks at 3300 cm (sharp) and at 2150 cm'. Propose a structure that is consistent with this data. (10 points) NH3
An unknow compound has the molecular formula C5H10O2 has the IR spectrum, and the RMN-^1H show below. a) Propose a structure that is consistent withthe information provided. b) Assign all signals in the spectrum of RMN-^1H. c) Assign at least two bands of the IR spectrum. Note : Remember determine the degrees of unsaturation of the compound. Yave Number, cm 4000 2000 2500 2000 1500 1200 1200 1100 1000 LLLLLLLLLL 100 Absorbance Wavelength, microns
Question 9 A compound has the molecular formula, C6H 120 2. Its IR spectrum shows a strong absorption band near 1740 cm -1; its TH NMR spectrum consists of two singlets, at d 1.4 and 8 2.0. The most likely structure for this compound is: فهل noir I II III to toe H IV V A. V B. III C. D. 11 E. IV
The infrared spectrum of an unknown compound with molecular formula C6H12O shows a strong, sharp peak at 1724 cm-1. From this and H-NMR spectrum shown below, deduce the structure of this compound.
An unknown substance has the formula C6H12O2. The compound shows four singlets in the 1H NMR spectrum at 3.8 (1 H, s), 2.6 (2 H, s), 2.2 (3 H, s) and 1.3 (6 H, s) ppm, respectively. . The 3.8 ppm proton exchanges with deuterium upon addition of D2O. In the IR spectrum, a wide absorption in the range of 3600-3200 cm-1 and a more sharp absorption at 1703 cm-1 is seen, among other things. Write down the structure of...
find IR/NMR structure. fill in the table. Problem A: A compound (A) has a molecular mass 121. Use the rule of thirteen to calculate a base formula with only C & H. Then, find a molecular formula with C, H and N only. Calculate the DU of the above molecular formula and determine if it is a valid molecular formula. Use the following IR and 1HNMR data and determine the structural formula.. 1HNMR Singlet at 1.00 ppm, 2H Triplet at...
A compound had the formula C5H12O and gave the following spectra 13C NMR: 3 signals IR spectrum: 3300 cm-1 (broad) and 3000-2850 cm-1 Draw the structure of the compound