Based on its 13C NMR spectrum, how many types of carbon (i.e., sets of equivalent carbons) are there in your unknown monosubstituted benzene starting material?

Based on its 13C NMR spectrum, how many types of carbon (i.e., sets of equivalent carbons) are present in the unknown monosubstituted benzene starting material?

Recognize which of the five listed molecules produces the 'H NMR spectrum shown. (1) HẠC-CH2-CH2-CH2-CHO (2) H3C-CH2-CH2- (3) H,C-CH-CH-CH, CH3 O (4) H3C-CH- CH3 (5) HỌC−C−CHO CH3 -CH3 11 10 Molecule (1) Molecule (2) Molecule (3) Molecule (4) Molecule (5) 6 8 7 6 5 4 3 2 1 ppm

Select the compound from each group that matches the HNMR spectrum shown below.

Use the observed 1H NMR data to decide whether C and its dianion are aromatic, antiaromatic, or not aromatic. C shows NMR signals at –4.25 (6 H) and 8.14–8.67 (10 H) ppm. The dianion of C shows NMR signals at –3 (10 H) and 21 (6 H) ppm. Why are the signals shifted upeld (or downeld) to such a large extent?

Draw the structures of Compound 13 a and 13b, clearly indicate your assignments of all proton resonances. Calculate the unsaturation index of each compound Compound 13a: C8H1002 A=7.17 ppm singlet 4h B=4.70 ppm singlet 4h C= 2.99 ppm singlet 2H 1)Excess CrO3, H2SO4 2) CH3OH (excess) , H+ heat Compound: C10H1004 A=8.11 ppm singlet 4H B=3.96 ppm singlet 6 H

QUESTION 6 Propose the structure of the following alcohol? Molecular formula C5H120 The following peaks are found in proton NMR spectrum 0.91 0 (3H, triplet) 1.19 (6H, singlet) 1.50 (2H, quartet) 2. 0 (1H, singlet)

What functional groups are shown in the IR spectrum shown below? LOD 5D 500 1500 1000 4000 3000 2000 alcohol aldehyde nitrile (i.e., RCN) ketone ester

t: How does deuteroacetone-do show up on the carbon NMR spectrum? a quartet at 30 ppm and a singlet at 206 ppm O a singlet at 30 ppm and 206 ppm a triplet at 30 ppm O a singlet at 30 ppm Oa septet at 30 ppm and a singlet at 206 ppm

Cyclohex-2-enone has two protons on its carbon–carbon double bond (labeled Ha and Hb) and two protons on the carbon adjacent to the double bond (labeled Hc). (a) If Jab = 11 Hz and Jbc = 4 Hz, sketch the splitting pattern observed for each proton on the sp2 hybridized carbons. (b) Despite the fact that Ha is located adjacent to an electron-withdrawing C = O, its absorption occurs upfield from the signal due to Hb (6.0 vs. 7.0 ppm). Offer an explanation.