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- 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)Exp 6. IR Spectroscopy OH NaOCI ACOH, 45-50 °C CS Scanned with CamScannerQ1. Calculate the resolution required to resolve peaks for (a) CH₂N (M= 28.0187) and C₂H4* (M = 28.0313). (b) C3H7N3+ (M = 85.0641) and C5H9O+ (M = 85.0653). (d) androst-4-en-3,17,-dione (M+) at m/z = 286.1930 and an impurity at 286.1240.
- Which one of the given compounds is consistent with the mass spectrum below? Relative Intensity 100 80 60 40 20 MG-IM-3440 ofm 10 O 20 30 60 CH3CH₂CH(CH3)2 CH3CHOHCH₂CH3 CH3CH₂OCH₂CH3 CH3CH₂NHCH₂CH3 CH3CH₂CH₂CH3 80 wwwwwwwwww 90 70 m/z Courtesy of SDBS: National Institute of Advanced Industrial Science and Technology 100 www. 110 120UNIT-II 3. (a) Explain why fac' isomer shows onlv one methyl signal whereas 'mer' isomer shows three methyl signals of cqual intensity in [Ru(2-(m-tolyalazo)pyridine) ,.TMS is usually used in NMR as a standard because it is soluble in a variety of solvents. It is, however, insoluble in D20. What is used as a standard in D₂0?@GMU 2020 O CDC13 O Acetone-d6 {CD3(C=O)CD3} O DSS {(CH3)3Si(CH2)3SO3¯Na*} O DMSO-d6 {CD3(S=O)CD3)
- f. What is the order of elution for the following compounds from a reversed-phase LC column? Hint: Rank the compounds by their polarity. i. benzene diethyl ether n-hexane ii. CIH2C-CH2CI NH2 acetone dichloroethane acetamideexplain the differences between NH4-N and TKN methods.LOD is www.guccia 4000 Relative Intensity 100- 80 60 40 20- 0 10 3000 15-11-02 при 20 30 2000 , where M+ = 102 - 40 MCH Given the following IR and Mass Spec, the molecular formula is 50 UM 1500 60 m/z 70 30 1000 ןוועןווװןו 90 100 and degree of unsaturation (U)
- Calculate the HDI of each FM and propose 2structures for two molecules that are isomers.Specify what the indicated absorption (s) shouldbe to.a.C7H15NO with strong absorptions in 3400, 3270and 1670, 1390, and 1370 cm-1b. C6H10O with absorptions in 2065 (m), 1685 (f),1650 (m) and 970 (f) cm-1c. C9H12O, with absorptions in 1600 and 1500 and1245 cm-1.CI NH 'N' chloroquine CI NH LHO N. N: hydroxychloroquine 5. You attempted to separate chloroquine and hydroxychloroquine using paper chromatography. You used a mixture of benzene and pyridine as your solvent. What results can you expect? O Two bands: hydroxychloroquine will have a higher Rf than chloroquine One band: Both will have equal Rf Four bands: The enantiomers of each analyte will appear as separate bands Two bands: chloroquine will have a higher Rf than hydroxychloroquine(2) Ⓒ on of KMnO4 ht рес CH₂C1₂ kicno h+ Sven Oxudation | (C) 2 N ht SOCI (ch3) Culi (e) OCH, M. (en) moint