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- Calculate the IHD of C7H6XNO and identify the important peaks in the following MS spectral data and draw the structure of the important peaks in the following MS spectral data.The leaves of the Brazilian Tree Senna multijunga contain a number of pryidine alkaloids that inhibit acetylcholinterinase. Two recentyl isolated isomeric compounds have the strcture have the strcture shown below. (NOTE: M=293) Use the mass spectral data provided to determine the precise location of the hydroxyl group in each isomer. Isomer A: EI-MS, m/z(rel. int): 222(20), 150(10), 136(25), 123(100) Isomer B:EI-MS, m/z(re;. int): 236(20), 150(10), 136(25), 123(100)Assign the peaks in theNMR spectrum of eugenol (Fig. 6.23) to specic protons in the molecule. The OH peakis at 5.1 ppm.
- The two square-planar isomers of [PtBrCl(PR3)2] (where PR3is a trialkylphosphene) have different 31P-NMR spectra as shown below. For this exercise, we ignore the coupling to 195Pt (I=1/2 at 33% abundance). One isomer (A) shows a single 31P resonance; the other (B) shows two 31P resonances, each of which is split into a doublet by the second 31P nucleus. Which isomer is cisand which is trans? Draw the structures of the two isomers.For each compound, assign likely structures to the fragments at each m/z value, and explain how each fragment is formed.a. C6H5CH2CH2OH: peaks at m/z = 104, 91b. CH2 = C(CH3)CH2CH2OH: peaks at m/z = 71, 68, 41, 31a.Calculate the degree of unsaturation of compound E. What information can be obtained from the calculated degree of unsaturation? b.Draw the most likely ion fragment for the signals at m/z 911, 139, and 156. c.Why do these signals at 111, 139, 156, and 184 appear as pairs with the intensities of 1/3 at 113, 141, 158, and 186? d.ldentify and draw the structure of compound E
- 03) How to differentiate by means of Infrared spectroscopy the following isomers?The two square-planar isomers of [PtBrCl(PR3)2] (where PR3 is a trialkylphosphene) have different 31P-NMR spectra as shown below. For this exercise, we ignore the coupling to 195Pt (I=1/2 at 33% abundance). One isomer (A) shows a single 31P resonance; the other (B) shows two 31P resonances, each of which is split into a doublet by the second 31P nucleus. Which isomer is cis and which is trans? Draw the structures of the two isomers.Determine the Ksp of the following reactions. a. NaC2H3O2 Na+ + C2H3O2- b. HBr H+ + Br c. Zn(OH)2 Zn+2 + 2HO- d. PbCl2 Pb+2 + 2Cl- e. SnSO4 Sn+2 + SO4-
