Question

In: Chemistry

The m/z of a singly charged fragment ion was determined to be 587.315 amu. What is...

The m/z of a singly charged fragment ion was determined to be 587.315 amu. What is the most likely composition of this fragment?

C19H43N10O11

C23H37N15O4

C25H39N12O5

C26H45N5O10

Thank you!

Expert Solution

m/z is basically mass to charge ratio in mass spectometry. m/z is equal to the mass of the cation divided by the charge of the cation.

m/z= mass of the cation/charge of the cation

In mass spectrometer the charge of the cation formed is mostly +1 hence

m/z= mass of the cation /+1

m/z= mass of the cation

The mass of the molecular ion is equal to the molecular weight of the compound. Therefore the mass-to-charge ratio of the molecular ion is equal to the molecular weight of the compound.

Compound

Molecular weight of the compound

Molecular weight of the singly charged fragment

C19H43N10O11

587.60

411.61

C23H37N15O4

587.64

523.64

C25H39N12O5

587.65

507.66

C26H45N5O10

587.66

427.67

Hence the most likely composition of this fragment is C23H37N15O4.

queen_honey_blossom answered 2 years ago

A proton and a singly charged ion of mass 91 atomic mass units (amu) are accelerated...

A proton and a singly charged ion of mass 91 atomic mass units (amu) are accelerated through the same potential difference and enter a region of uniform magnetic field moving perpendicular to the magnetic field. What is the ratio of their kinetic energies? If the radius of the proton's circular path in the magnetic field is 16.8 cm , what is the radius of the path of the singly charged ion of 91 amu? By what factor must the magnetic field be...

1. A compound composed of carbon, hydrogen & oxygen has a molecular ion at m/z=112 amu...

1. A compound composed of carbon, hydrogen & oxygen has a molecular ion at m/z=112 amu in its mass spectrum. The base peak is at m/z=28 amu. The infrared spectrum shows strong absorption in the 2850 to 2980 cm-1 region, and very strong absorption at 1717 cm-1. The 1H nmr shows a single sharp signal at ? = 2.7 ppm, and the 13C nmr has two signals ( ? = 37 & 208 ppm ).

A compound has an M+ ion at 158 amu. The intensity of the M+1 peak is...

A compound has an M+ ion at 158 amu. The intensity of the M+1 peak is 9.9% of the M+ peak. There is no significant M+2 peak. The only IR absorbances in the interpretable region are at 2850 and 1740 cm−1. Draw a structure consistent with this information.

A compound has an M+ ion at 102 amu. There is no M+2 peak. The only...

A compound has an M+ ion at 102 amu. There is no M+2 peak. The only IR absorbances in the interpretable region are at 3500 and 2900 cm−1. The 13C NMR spectrum shows three resonances at δ 70 (d), 35 (t), and 30 (t). Draw a structure consistent with this information.

A singly charged 7Li ion has a mass of 1.16 10-26 kg. It is accelerated through...

A singly charged 7Li ion has a mass of 1.16 10-26 kg. It is accelerated through a potential difference of 495 V and subsequently enters a uniform magnetic field of magnitude 0.366 T perpendicular to the ion's velocity. Find the radius of its path.

1- On a mass spectrum, the molecular ion has an m/z = 58. What is the...

1- On a mass spectrum, the molecular ion has an m/z = 58. What is the name of the peak at m/z = 59? Select one: a. molecular ion b. M+1 c. M+2 d. A peak has no name. 2-Assume a molecule has an even value of m/z for its molecular ion. Choose all of the possible numbers of nitrogens this molecule may contain. Select one or more: a. 2 b. 1 c. 4 d. 0 e. 3

a. What would be the m/z value for the molecular ion peak of acetaldehyde (ethanal)? Remember...

a. What would be the m/z value for the molecular ion peak of acetaldehyde (ethanal)? Remember m/z values are whole numbers. Please show work and explain why.

2- The vapor pressure of pure benzene (M=78.12 amu) and pure toluene (M=92.14 amu) at 298.15...

2- The vapor pressure of pure benzene (M=78.12 amu) and pure toluene (M=92.14 amu) at 298.15 K are 103.1 Torr and 28.4 Torr, respectively. A solution is prepared from a mixture of 100.0 g each, under 1.000 atm pressure and equilibrium is established. i- What would be the composition of the vapor assuming the solution to be an ideal one? (5 pts) ii- What are the changes in the chemical potentials of the liquid and gaseous benzene and toluene upon...

1. An organic compound has a molecular ion at m/z = 90, an M+1 isotope peak...

1. An organic compound has a molecular ion at m/z = 90, an M+1 isotope peak at m/z = 91, and an M+2 isotope peak at m/z = 92. The M+1 signal is 5% of the molecular ion’s intensity. The M+2 signal is 4% of the molecular ion’s intensity. What is the molecular formula of the compound? What functional groups are compatible with this molecular formula? Show your reasoning. 2. If the dihedral angle between two nonequivalent vicinal protons is...

Analyze what is meant by "the transport of an ion across a membrane is determined by...

Analyze what is meant by "the transport of an ion across a membrane is determined by its electrochemical potential." In doing this, describe the factors that must be taken into account when considering whether the transport of a charged solute across a membrane is endergonic or exergonic. Consider how this compares to uncharged solutes. Compare simple diffusion and osmosis Given that most cells are hypertonic relative to their environment, describe how this in turn affects the movement of water into...