The BP requires ephedrine (C10H15NO·½H2O) to contain not less than 99.0 per cent and not morethan 101.0 per cent C10H15NO with respect to the anhydrous substance. Use the data below tosee if the sample complies with this requirement.(a) Loss on drying: 0.3152 g of sample had a mass of 0.2991 g after drying.(b) Assay: 0.3751 g was dissolved in ethanol and 25.0 mL of 0.0935 M hydrochloric acidadded. The excess acid was back titrated with approximately 0.1 M sodium hydroxide and1.93 mL was required. A blank titration was performed and required 24.17 mL of thesodium hydroxide.

The BP requires ephedrine (C10H15NO·½H2O) to contain not less than 99.0 per cent and not morethan 101.0 per cent C10H15NO with respect to the anhydrous substance. Use the data below tosee if the sample complies with this requirement.(a) Loss on drying: 0.3152 g of sample had a mass of 0.2991 g after drying.(b) Assay: 0.3751 g was dissolved in ethanol and 25.0 mL of 0.0935 M hydrochloric acidadded. The excess acid was back titrated with approximately 0.1 M sodium hydroxide and1.93 mL was required. A blank titration was performed and required 24.17 mL of thesodium hydroxide.

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter14: Mass Spectrometry

Section: Chapter Questions

Problem 14.29P

See similar textbooks

Similar questions

Identify the reagent used in the following transformation: OH P Q HO HO P = LIAIH, Q = KMNO, Q = MnO, / CH,Cl, Q = Ag,CO, on celite, PhH (A) (B) P= NABH, /MeOH %3D (C) P=CeCl,.7H,O (D) P= NABH, /CeCl,.7H,0 , / CeCly.7H,O Q = MnO, / CH,Cl,
Given is teh mass spectogram of an unknown compoound. This unstable cyclic compund is a colorless liquid with a sharp odor and reacts with light and air with long exposure. What is the molar mass of the target mecule? What is the Molecular formula of the target molecule? What IHD /U ? What could be the description of the structure? Give the name of the structure.
Compound is a neutral, low-melting solid (melting point 50-52 °C). The Mass, IR, and 'H NMR spectra, along with 13C NMR data, are given below. Elemental Analysis: C, 54.90; H, 4.61; N, 9.15; O, 31.34.
1. Which is a false statement regarding solid-phase synthesis? (a) It simplifies removal of solvents (b) It simplifies automation of reactions (c) It simplifies monitoring of reactions (d) It simplifies reproducibility of reactions (e) It simplifies removal of soluble reagents 2. Which is a main advantage of solid-phase synthesis? (a) It simplifies purification of products (b) It can be performed on a large scale (c) It simplifies monitoring of reactions (d) It requires less amount of reagents (e) It simplifies characterisation of intermediates
Compound 47 is a high-boiling liquid (boiling point 204-205 'C), that reacts with Ag* ion in aqueous ammonia to form a "silver mirror" (the Tollens test). The Mass, IR, and 'H NMR spectra, along with 13C NMR data, are given below. Elemental Analysis: C, 79.97; H, 6.71; O, 13.32.
(2p) General Instruction: Give a brief interpretation from the table in the picture. Provide or answer also the ‘Descriptive Equivalent’ of the table. Make sure the interpretation is related to the given question in the table. Please refer to the subsequent picture for your guide. Note: Make sure your interpretation is the same or similar format with the guide provided that is shown in the subsequent picture . Title for the tables: Youth Awareness and Perception Towards COVID-19. Legend: SD – Strongly Disagree D – Disagree A – Agree SA – Strongly Agree
2 (b) In the following reaction, compounds B or C might be formed. HCI or CI (i) By using the 1H NMR spectra, explain the difference in these two products. (ii) In a mass spectrum of compound B, identify the m/z for the molecular ion peak(s). (iii) Explain the intensity of the molecular ion peak(s) observed in (ii). (iv) For compound C, propose a cation structure at m/z 71.
Treatment of an organic compound with hot, concentrated hydriodic acid(also known as the Zeisel analysis) yields CH3I, indicating the presence of methoxyl group (-OCH3). Unknown organic compound F (one of the opium alkaloids used in antispasmodic medicine whose formula is C19H21NO3) was treated with hot concentrated hydroidic acid to determine the number of methoxyl groups present in the molecule. When 7.12mg of compound F is treated with hydriodic acid and the CH3I thus formed is passed into alcoholic silver nitrate, 10.73mg of silver iodide is obtained. How many methoxyl groups per molecule of compound F would be indicated by the results of this Zeisel analysis?
Compound 48 is a low-melting solid (melting point 55-57 °C), that is soluble in dilute aqueous base, but precipitates on acidification. The Mass, IR, and 'H NMR spectra, along with 13C NMR data, are given below. Elemental Analysis: C, 67.73; H, 6.5o; O, 25.78.
C) Suggest chemical method to synthesis compound (2) from compound (1). 0-CH2 "H2 C'H;C'H÷=CH, Сно (1) (2)
Identify the reagent used in the following transformation: OH P Q HO OH HO (A) P = LIAIH, Q = KMNO4 Q = MnO, / CH,Cl, Q= Ag,CO, on celite, PhH %3D (В) P= NABH, /MeOH %3D (C) P=CeCl,.7H,O (D) P= NABH, /CeCl,.7H,0 , / CeCl,.7H,O Q = MnO, / CH,Cl,
The IR and NMR spectra of the material whose structure formula is C16H22O4 are given below.To this datawhat could be the ingredient?