The degree of unsaturation, or index of hydrogen deficiency, is the number of pi bonds plus rings in a molecule. Specify the degree of unsaturation (index of hydrogen deficiency) of the following formulas: (a) C24H30 (b) C15H22 (c) C4H,Cl,N
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- A compound C4H11N is known from its reactivity andspectroscopic properties to have no hydrogen atomsattached directly to the nitrogen atom. Write all structuralformulas consistent with this informationThe shrub ma huang (Section 5.4A) contains two biologically activestereoisomers—ephedrine and pseudoephedrine—with two stereogeniccenters as shown in the given structure. Ephedrine is one component ofa once-popular combination drug used by body builders to increaseenergy and alertness, whereas pseudoephedrine is a nasaldecongestant.a.) Draw the structure of naturally occurring (−)-ephedrine, which has the1R,2S configuration.b.) Draw the structure of naturally occurring (+)-pseudoephedrine, whichhas the 1S,2S configuration.c.) How are ephedrine and pseudoephedrine related?d.) Draw all other stereoisomers of (−)-ephedrine and (+) pseudoephedrine, and give the R,S designation for all stereogeniccenters.e.) How is each compound drawn in part (d) related to (−)-ephedrine?Calculate the number of degrees of unsaturation in a compound ofmolecular formula C4H6, and propose possible structures ?
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- Plants extract are widely used in many parts of Cameroon to treat infectious disease or related symptoms including abdominal pains, itching, urinary and respiratory ailments, fever, coughing and diarrhea. Harunmadagascarin C as depicted below is an extract from the plant Harungana madagascariensis that has been studied for potential antimicrobial activity. Which statement best describes the stereochemistry of the compound? a. Harunmadagascarin C is achiral and does not have any stereogenic or chiral centers. b. The two stereogenic centers are currently in the E configuration, and the double bond in the ring structure is not stereogenic. c. There are four possible stereoisomers for Harunmadagascarin C since, as depicted, there are 2 stereocenters in the compound. d. There is one chiral center present in the molecule.What is the degree of unsaturation for compoundC11H7ClO?γ-Butyrolactone (C4H6O2, GBL) is a biologically inactive compound that is converted to the biologically active recreational drug GHB (Section 19.5) by a lactonase enzyme in the body. Since γ-butyrolactone is more fat soluble than GHB, it is more readily absorbed by tissues and thus produces a faster onset of physiological symptoms. γ-Butyrolactone shows an absorption in its IR spectrum at 1770 cm−1 and the following 1H NMR spectral data: 2.28 (multiplet, 2 H), 2.48 (triplet, 2 H), and 4.35 (triplet, 2 H) ppm. What is the structure of γ-butyrolactone?
- An optically active unknown compound B, whose molecular formula is C6H10, reacts with H2/Ni produce compound C, whose molecular formula is C6H14. Compound C is optically inactive. What are the structures of compound B and C ?Following is the structure formula for Sertaline(Zoloft), widely prescribed to treat depression. Circle all the sterocenters present- how many stereoisomers of Zoloft are possible? Of these stereoisomers, how many are likely to be biologically effective in treating depression? Explain briefly.To be aromatic, a molecule must have 4n + 2 πs electrons and must have a planar, monocyclic system of conjugation. Cyclodecapentaene fulfills one of these criteria but not the other and has resisted all attempts at synthesis. Explain.