a. Explain why tetramethylsilane (TMS) is used as a standard in NMR spectroscopy. b. In NMR we

Question:

a. Explain why tetramethylsilane (TMS) is used as a standard in NMR spectroscopy.

b. In NMR we use solvents such as tetrachloromethane to prepare samples for the machine (Figure 29.16).

i. What is the molecular formula of tetrachloromethane?

ii. Why do you think tetrachloromethane is used as a solvent?

iii. Solvents that contain deuterium, D, are also used as solvents in NMR. Deuterium is the isotope ²H. A substance in which ¹H is replaced by ²H is said to be deuterated. Why would the deuterated solvent CDCl₃ be used instead of CHCl₃?

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Cambridge International AS And A Level Chemistry Coursebook

ISBN: 9781316637739

2nd Edition

Authors: Lawrie Ryan, Roger Norris

See More Books

Question Posted: Sep 24, 2021 02:49 AM

See More Questions

What is the molecular formula of the following compound? Empirical formula: CH ( = 78.11 g/mol):
What is the molecular formula of each of the following compounds? (a) Empirical formula CH2, molar mass = 84 g/mol (b) Empirical formula NH2Cl, molar mass = 51.5 g/mol
What is the molecular formula of each of the following compounds? (a) Empirical formula HCO2, molar mass = 90.0 g/mol (b) Empirical formula C2H4O, molar mass = 88 g/mol
"If nominal GDP rises, velocity must rise." Is this statement true, false, or uncertain? Explain your answer.
A project requiring an immediate investment of $150 000 and a further outlay of $40 000 after four years have a residual value of $30 000 after nine years. The project yields a negative net return of...
From the following, record the transactions in Burbanks auxiliary petty cash record and general journal as needed: 201X Oct. 1 A check was drawn (no. 444) payable to Eileen Cooper, petty cashier, to...
A long, straight wire carrying a current of $2.5 \mathrm{~A}$ to the left is placed directly below and parallel to the central axis of a solenoid that has 1000 windings per meter of length and a...
Bulldog Auto Service was started on January 1, 2014. The company experienced the following events during its first two years of operation: Events Affecting 2014 1. Provided $45,000 of repair services...
(a) During the audit of the Weak Bank (W), RBI has suggested that the Bank should either merge with another bank or may close down. Strong Bank (S) has submitted a proposal of merger of Weak Bank...
Sunset Graphics is considering two mutually exclusive projects. Both require an initial investment of $100,000. Assume a marginal interest rate of 10 percent and no residual value for either...
Predict the number of peaks and the relative areas under each peak, where appropriate, on the low resolution proton NMR spectrum of: a. Methanol, CH 3 OH b. Benzene, C 6 H 6 c. Chloroethane, C 2 H 5...
Compound B has the composition 62.1% carbon, 10.3% hydrogen and 27.6% oxygen. Its mass and 1H NMR spectra are shown below. a. b. a. Calculate the empirical formula of B. b. From the mass spectrum,...
Joseph H. Jones and others (debtors) borrowed money from Columbus Junction State Bank (Bank) and executed a security agreement in favor of Bank. Bank perfected its security interest by filing...
Should a firm's EBT be based upon the actual or estimated return on plan assets.
There are pros and cons to offshore outsourcing. List and explain 2 pros and 2 cons.
Its just reading the case study to help with questions. How will the components of the external environment impact TOMS Shoes' ability to realize their vision? Who are TOMS Shoes' major competitors?...
Given the chemical equilibrium CO2(g) + H2(g) CO(g) + H2O(l), H = -2.85 kJ, S = -76.8 J/K. At what temperature would equilibrium constant K = 0.128? Enter the temperature in K. (Round to the nearest...
On January, 20X1, Aneth Company had 500,000 shares of common stock issued and outstanding. Aneth issued a 10 percent stock dividend on June 1, 20X1. On November 1, 20X1, Aneth reacquired 30,000...
A magnetic dipole antenna is used to detect an electromagnetic wave. The antenna is a coil of 50 turns with radius 5.0 cm. The EM wave has frequency 870 kHz, electric field amplitude 0.50 V/m, and...
Revol Industries manufactures plastic bottles for the food industry. On average, Revol pays $76 per ton for its plastics. Revol's waste-disposal company has increased its waste-disposal charge to $57...
The molar heat capacity C P,m of SO 2 (g) is described by the following equation over the range 300 K < T < 1700 K: In this equation, T is the absolute temperature in kelvin. The ratios T/K ensure...
Use the relation (U/V ) T = T(P/T) V P and the cyclic rule to obtain an expression for the internal pressure, (0U/0V )T , in terms of P, , T, and .
A mass of 34.05 g of H 2 O(s) at 273 K is dropped into 185 g of H 2 O(l) at 310.K in an insulated container at 1 bar of pressure. Calculate the temperature of the system once equilibrium has been...
On July 1, 2024, Truman Company acquired a 70 percent interest in Atlanta Company in exchange for consideration of $801,900 in cash and equity securities. The remaining 30 percent of Atlanta's shares...
The following cost data relate to the manufacturing activities of Chang Company during the just completed year: Manufacturing overhead costs incurred: Indirect materials Indirect labor Property...
Olivia Smith carries on a landscaping business as a sole proprietor. The business began opera- tions on January 2, 2021, and has a December 31 year end. The 2021 and 2022 results for the business can...

a. Explain why tetramethylsilane (TMS) is used as a standard in NMR spectroscopy. b. In NMR we

Question:

The Figure 29.16 Samples dissolved in a solvent in narrow tubes ready for NMR analysis.

Step by Step Answer:

a Tetra methyl silaneTMS chosen for internal standard in proton NMR becau...View the full answer

Cambridge International AS And A Level Chemistry Coursebook

Students also viewed these Sciences questions