/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q18 P Find the number of rings 1 doubl... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Find the number of rings 1 double bonds in molecules with the following compositions and draw one plausible structure for each: C11H18N2O3(a) (b)C12H15BrNPOS(c) fragment in a mass spectrum with the composition C3H5+.

Short Answer

Expert verified

(a) The structure of C11H18N2O3is

(b) The structure of C12H15BrNPOSis

(c) The structure of C3H5+is

Step by step solution

01

Definition 

The total number of unsaturation contained in an organic molecule is known as the Double Bond Equivalence (DBE), and an unsaturation is defined as a double bond or a cyclic or ring system.

We must determine the structure of the provided chemicals in this challenge.

If we know the molecular formula of a molecular ion, we may calculate the number of rings and double bonds:

R+DB=c-h2+h2+1...(1)

Here,

c = The number of atoms in group 14 (make four bonds)

h = The number of halogen atoms in the H+ state (make one bond)

n = The number of atoms in group 15 (make three bonds)

Group 16 atoms, such as O and S, are not included in the calculatio

02

Creating plausible structure C11H18N2O3

The number of atoms in group 14 is 11, the number of atoms in group H is 18, and the number of atoms in group 15 is 2.

So, to get the number of rings and double bonds, we plug data into equation 1

R+DB=11-182+22+1=4

One ring and three double bonds are possible in a molecule.

As a result, the structure is as follows:

03

Creating plausible structure C12H15BrNPOS

The number of atoms in group 14 is 12, the number of atoms in group H+ halogen is 1 5+1, and the number of atoms in group 15 (N+P) is 1 + 1.

So, to get the number of rings and double bonds, we plug data into equation 1:

R+DB=12-15+12+1+12+1=6

Two rings and four double bonds are possible in a molecule.

As a result, the structure is as follows:

04

Creating plausible structure C3H5+

The number of atoms in group 14 is three, while the number of atoms in group H is five.

So, to find the number of rings and double bonds, we plug data into equation 1.

R+DB=3-52+02+1=1.5

One double bond is possible in the molecule. We have a fraction, and the C atom has three bonds (rather than four), thus we have 1.5.

As a result, the structure is as follows:

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

(a) Find the number of rings plus double bonds in a molecule with the composition C14H12and draw one plausible structure.

(b)For an ion or radical, the rings + double bonds formula gives noninteger answers because the formula is based on valences in neutral molecules with all electrons paired. How many rings plus double bonds are predicted for C4H10NO+? Draw one structure forC4H10NO+.

Draw a rearrangement like reaction D in figure 22-12 to show how m/z 58 arises from 4-methyl-2-pentanone.

(This is a long exercise suitable for group work.) Relative intenities for the molecular ion region of several compounds are listed in arts (a)-(d) and shown in the figure. Suggest a composition for each nolecule and calculate the expected isotopic peak intensities.

a) m/z(intensity):94(999),95(68),96(3)

b)m/z(intensity):156(566),157(46),158(520),159(35)

c) m/z (intensity):224(791),225(63),226(754),227(60),28(264),229(19),230(29)

d)m/z(intensity):154(122),155(9),156(12)(Hint:Containssulfur.)

(a) To detect the drug ibuprofen by liquid chromatography– mass spectrometry, would you choose the positive or negative ion mode for the spectrometer? Would you choose acidic or neutral chromatography solvent? State your reasons.

(b)If the unfragmented ion has an intensity of 100, what should be the intensity of M+1?

Bone consists of the protein collagen and the mineral hydroxyapatite,Ca10(PO4)6(OH)2. The content of archaeological humanskeletons measured by graphite furnace atomic absorption shedslight on customs and economic status of individuals in historicaltimes. 37 Explain why La3+is added to bone samples to suppressmatrix interference in Pbanalysis.

See all solutions

Recommended explanations on Chemistry Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.