Interpretation:
In which rule expect for the
Concept Introduction:
Nitrogen rule: The nitrogen rule states, that a molecule that has no or even number of nitrogen atoms has an even nominal mass, whereas a molecule that has a odd number of nitrogen atoms has an odd nominal mass.
Nominal mass: The nominal mass for an element is the mass number of it is most abundant naturally occurring stable isotope and for an ion or given molecule the nominal mass is the sum of the nominal masses of the constituent atoms.
Example: The exact mass of the most abundant
For example hydrogen
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Organic Chemistry
- The mass spectrum of benzocaine is given below. Draw the structures of the fragment ions that give arise to the peaks at m/z= 165, 137, 120, and 92. 70eV Electron kanization Mass Spectrum Aonarce H2N benzocainearrow_forwardWhat is not true about mass spectrometry? Only the molecular ion and cationic fragments are deflected, and they are then separated by their mass-to-charge ratio (m/z) In a mass spectrometer, a compound is first vaporized and then bombarded with electromagnetic radiation which generates a radical cation that is symbolized by (M) + A molecular ion is often very unstable and susceptible to fragmentation In a mass spectrometer, a compound is converted into ions, which are then separated by a magnetic field. It is used to determine the molecular weight and molecular formula of a compound.arrow_forwardCan IR spectroscopy be used for quantitative analysis? >No, because IR spectroscopy only records vibrational frequency of bonds. >No, because IR spectroscopy only identifies the types of covalent bonds. >Yes, because the transmittance of the analyte is proportional to concentration. >Yes, because the absorbance of the analyte is proportional to concentration.arrow_forward
- What is the molecular mass observed for Man9(GlcNAc)2 if it has a mass spectrometry ionization that imparts a +3 charge state? .arrow_forwardMolecular Recognition (Supramolecular Chemistry) in organic chemistry deals with the "lock and key " mechanisms that form new molecules. However, little is known of this subject when moleules go beyond 1500 daltons (g/mole) for example macromolecules of polyolefins (polyethylene, polypropylene), thermoplastic polyesters and polyamides (nylon). It is understood that pre-directional H bonding is the mechanism of molecular recognition of macromolecules. Question: What is the immediate and post manifestation of inducing molecular recognition to condensation polymers and ring opening polymerization polymers like thermoplastic polyesters (PET ), and Nylon 66, 6 etc. (polyamides)?arrow_forwardHow can you distinguish aldehydes, ketones, and carboxylic acids from each other using IR spectra? Explain using specific examples.arrow_forward
- You measured the carbon-carbon bond lengths of four different compounds in Experiment 8 (Molecular Modeling and IR spectroscopy). Which of the following compounds has the shortest average C-C bond length? Benzene Cyclohexene Cyclohexane O Cyclohexadiene Which of the following statement(s) is(are) true? Select all that apply: When two atoms are bonded together, the distance between atoms is the same all the time. In the IR spectrum, carbonyl groups (C=O) have strong sharp peaks ranging from 1700 cm 1 to 1750 cm-1. When a molecule absorbs an IR radiation, electrons are excited within the molecule and each absorbed electron creates a band in the molecules IR spectrum. IR spectroscopy is useful in confirming the structure of the analyzed compound. Molecule N2 does not absorb IR radiationarrow_forwardWhat is the structure of the compound in Spec. 1? Would ethylene oxide be a reasonable answer? 8 S SPEC 0 C₂4.0arrow_forwarddescribe/ analyze the IR spectra pattern of salicylic acidarrow_forward
- A certain compound was known to have a formula which could be represented as [PdCxHyN₂ ](ClO4)2. Analysis showed that the compound contained 30.15% carbon, 5.06% hydrogen. When converted to the corresponding thiocyanate, [PdC₂H₂N₂ ](SCN)₂, the analysis was 40.46% carbon and 5.94% hydrogen. Calculate the value of x, y, and z.arrow_forwardA certain compound was known to have a formula which could be represented as [PdCxHyN₂ ](ClO4)2. Analysis showed that the compound contained 30.15% carbon, 5.06% hydrogen. When converted to the corresponding thiocyanate, [PdC₂H₂N₂ ](SCN)₂, the analysis was 40.46% carbon and 5.94% hydrogen. Calculate the value of x, y, and z. Ox=14, y = 28, z= 4 x = 28, y = 4, z= 14 Ox= 14, y = 4, z= 28 O x = 4, y = 14, z = 28arrow_forwardA student has acquired an IR spectra of an unknown six-carbon molecule and has determined that it is either 2-hexyne, 1- hexyne, or 1-hexene. How can the student use their knowledge of IR spectroscopy to determine the identity of the molecule? In your answer, clearly specify what regions of the IR spectrum the student should look at and what bonds are responsible for the absorption bands you indicate.arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning