How many unique carbon atoms are in hexane (CH3CH2CH2CH2CH2CH3)? In other words, how many peaks would you expect in its 13C NMR spectrum? 1 2 3 6
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How many unique carbon atoms are in hexane (CH3CH2CH2CH2CH2CH3)? In other words, how many peaks would you expect in its 13C NMR spectrum?
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- Following are 1H-NMR spectra for compounds G, H, and I, each with the molecular formula C5H12O. Each is a liquid at room temperature, is slightly soluble in water, and reacts with sodium metal with the evolution of a gas. (a) Propose structural formulas of compounds G, H, and I. (b) Explain why there are four lines between 0.86 and 0.90 for compound G. (c) Explain why the 2H multiplets at 1.5 and 3.5 for compound H are so complex.A 13C NMR spectrum of commercially available 2,4-pentanediol, shows five peaks at 23.3, 23.9, 46.5, 64.8, and 68.1 . Explain.The proton - decoupled 13C NMR of X (C6H3Br3) displayed only 2 signals. What is the element of unsaturation? Draw out the structure of X
- The H1H1 NMR spectrum shown corresponds to an unknown compound with the molecular formula C6H10C6H10. There are no strong IR bands between 2100 and 2300 or 3250 and 3350 cm−1. Deduce and draw the structure of the molecule that corresponds to the spectrum.The 1H-NMR spectrum of Compound C shows five signals – δ 2.38 (1H, dt), 2.72 (1H, dt), 5.34 (1H, t), 5.49 (2H, ddd), 6.27 (2H, dd) ppm. Its 13C-NMR spectrum has four signals – δ 26, 58, 127, 129 ppm. In the compound’s mass spectrum, the M+1 peak appears at m/z = 115. An M+2 peak, whose intensity is roughly one-third that of the M+1 peak, also appears. Suggest a structure for this compound.Which one of the following isomeric C8H18 compounds has five peaks in its 13C NMR spectrum?
- The Ketone (CH3)2CHCH2C(O)CH=CH2 would have ___________ signals in its 1H NMR and ______________ signals in its 13C NMR spectra. (Enter your responses as numbers)Esters of chrysanthemic acid are naturally occurring insecticides. How many lines are present in the 13C NMR spectrum of chrysanthemic acid?Draw the structure for the two compounds below and give the number of peaks that would be observed in their 1H and 13C NMR spectrums. m-chlorobenzamide s-cis-2,3-dimethyl-1,3-butadiene I appreciate the help!
- A compound used as a moth repellant has three molecular ion peaks at m/z = 146 (100%), 148 (65%) & 150 (10%) amu in its mass spectrum. A pair of smaller peaks are seen at m/z= 111 (34%) & 113 (11%). The infrared spectrum shows sharp absorption just above 3000 cm^-1 region, and also at 1480 cm^-1. The ^1 H nmr shows a single sharp signal at delta = 7.2 ppm, and the ^13 C nmr has two signals (delta = 133 & 130 ppm).Assume a compound with the formula C4H8O. a) How many double bonds and/or rings does your compound contain? b) If your compound shows an infrared absorption peak at 1715 cm-1, what functional group does it have? c) If your compound shows a single 1H NMR absorption peak at 2.1 δ, what is its structure?Determine the structure of an alcohol with molecular formula C5H12O that exhibits the following signals in its 13C NMR spectra: a. Broadband decoupled: 73.8 δ, 29.1δ, and 9.5 δ b. DEPT-90: 73.8 δ c. DEPT-135: positive signals at 73.8 δ, and 9.5 δ, and negative signal at 29.1δ,
