Carey Giuliano Solutions Manual
Organic chemistry carey download pdf. Organic Chemistry 8th edition Carey Giuliano c2011 txtbk. Carey Organic Chemistry 8th c2011. Carey F.A.Solutions Manual.
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Organic Chemistry, 7e (Bruice) Chapter 14 Mass Spectrometry 1) Which of the following molecular changes is necessary for mass spectrometry to occur? A) excitation of an electron from the ground state to higher energy state B) change of alignment of an electron in a magnetic field C) change of alignment of a proton in a magnetic field D) loss of an electron E) molecular vibration 2) Which of the following statements best describes the meaning of the following species: CH3CH2CH3 ∙ +? A) It is the molecular ion of propane. B) It is the parent ion of propane. C) It is the radical cation of propane.
D) The m/z value is 44. E) all of the above 3) Which of the following m/z values is the molecular ion for 2-butanone? A) 15 B) 29 C) 43 D) 57 E) 72 4) What does 'm/z' stand for and what does it mean? The 'm' stands for the mass and 'z' for the charge. Since most fragments have a charge of +1, m/z is the molecular weight of the fragment. 5) Which of the following statements best explains the information we can gain from mass spectrometry?
A) It allows us to determine the number of protons in a compound. B) It allows us to determine the kinds of functional groups in a compound. C) It allows us to determine the molecular weight and the mass of some fragments of a compound.
D) It allows us to determine the presence and nature of a carbocation in the compound. E) It allows us to determine the presence and nature of a free radical in the compound. 6) What m/z value would you predict for the most stable fragment peak in the mass spectrum of 4-ethylheptane? A) 128 B) 127 C) 113 1 D) 99 E) 85 7) 2-Methylhexane shows an intense peak in the mass spectrum at m/z = 43.
Propose a likely structure for this fragment. CH3-CH2-CH2+ 8) Give the m/z ratio of the molecular ion in the mass spectrum of 1-butanol. 74 9) Give the m/z ratio that corresponds to the molecular ion in the mass spectrum of 2bromobutane. 136 en 138 10) Which of the following statements best explains how a hydrocarbon can show an M+2 peak in mass spectrometry? A) from 13C and 1H B) from 12C and 2H C) from a single 13C D) from a single 3H E) from two 13C's 11) Which of the following m/z values is the base peak for benzyl alcohol?
A) 77 B) 108 C) 91 D) 17 E) 52 12) Which of the following is the base peak for the compound below? A) 77 B) 92 C) 15 D) 57 E) 43 2 16) The mass spectra of heptane and 2,2,3-trimethylbutane are given below. Which spectrum represents which compound? 4 Organic Chemistry, 7e (Bruice) Chapter 14 Infrared Spectroscopy and UV/Vis Spectroscopy 1) Which of the following regions of the electromagnetic spectrum has the greatest energy per photon? A) visible B) microwave C) radio D) ultraviolet E) infrared 2) Which of the following normally occurs in a molecule when a photon of infrared light is absorbed? A) An electron moves to an orbital of higher potential energy.
B) A transition between allowed vibrational energy states occurs. C) An electron changes alignment in a magnetic field. D) The molecule gains an electron.
E) The molecule loses an electron. 3) In the electromagnetic spectrum, high frequencies, large wavenumbers, and short wavelengths are associated with high energy. A) high, small, long B) low, large, short C) low, small, short D) high, large, short E) high, small, short 4) An infrared wavelength of 4.48 m is equivalent to a wavenumber of 2230 cm-1. 5) Which has the higher speed in a vacuum, ultraviolet or infrared light? They have the same speed 6) Which region of the electromagnetic spectrum, IR or X-ray, is characterized by waves of lower frequency? IR 7) Which of the infrared regions is considered to be the fingerprint region?
A) 4000cm-1 - 1000cm-1 B) 4000 m - 1000 m C) 2200 m - 1000 m D) 1000cm-1 - 400cm-1 E) 1000 m - 400 m 8) While cleaning the organic stockroom, a student found a bottle of ethanol labeled 'Denatured with Benzene.' He decided to determine the concentration of benzene in the ethanol by acquiring the UV spectrum of the liquid in a 2.0 cm cell. The spectrum exhibited an absorption band at 260 nm which was attributable to benzene, and the absorbance of this band was 0.69.
In a reference source, the student found that the molar absorptivity of this benzene band in ethanol was 230 M 1 15) In the UV-visible spectrum of, the lowest energy absorption corresponds to. A) a π to π. transition B) a σ to π.
transition C) a π to σ. transition D) a σ to σ. transition E) a σ to π transition 16) Which of the following methods is most suitable for studying conjugation in molecules? A) infrared B) NMR C) mass spectrometry D) X-ray E) UV visible 17) Which of the following compounds exhibits the highest max in UV spectra?
A) I B) II C) III D) IV E) V 18) When a solution of an organic compound absorbs light whose wavelength is 400 nm, the solution appears. A) yellow B) red C) purple D) blue E) white 19) The pKa of a compound whose acidic or basic form absorbs UV or visible light can be determined spectroscopically since.
A) lmax always decreases as acidic form is converted to basic B) the pKa is the same as the pH at which half of the total absorbance increase occurs C) absorbance of the basic form is always twice that of the acidic form D) absorbance of the acidic form is always twice that of the basic form E) delocalization always leads to a decrease in acidity 3 Organic Chemistry, 7e (Bruice) Chapter 15 NMR Spectroscopy 1) Which of the following electromagnetic wave types is used in nuclear magnetic resonance spectroscopy? A) X-ray B) infrared C) visible D) radio E) ultraviolet 2) If the frequency for flipping a 1H nucleus at an applied field of 1.4092 Tesla is 60 MHz, what would be the applied magnetic field if the frequency is 360 MHz?
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A) 8.4552 Tesla B) 0.2349 Tesla C) 1.4092 Tesla D) 4.2577 Tesla E) 3.0439 Tesla 3) 1H nuclei located near electronegative atoms tend to be relative to 1H nuclei which are not. A) shielded B) deshielded C) resonanced D) split E) none of the above 4) How many signals would you expect to see in the 1H NMR spectrum of the following compound? A) 2 B) 4 C) 3 D) 5 E) 6 5) How many signals would you expect to see in the 1H NMR spectrum of the following compound?
A) 6 1 D) 4 E) 5 10) What is the ratio of the protons in the following compound? A) 3:3:3:2 B) 6:3:2 C) 9:2 D) 3:2 E) 6:2 11) What splitting pattern is observed in the proton NMR spectrum for the indicated hydrogens? A) singlet B) doublet C) triplet D) quartet E) septet 12) What splitting pattern is observed in the proton NMR spectrum for the indicated hydrogens? A) singlet B) doublet C) triplet D) quartet E) septet 13) How many distinct triplets would you expect in the 1H NMR of the compound below? A) 0 B) 2 C) 4 D) 6 3 E) 8 14) Which of the following technique(s) can readily distinguish between:? A) NMR B) IR C) MS D) A and B E) A and C 15) An unknown compound, C9H12, gave the following NMR spectrum: Triplet at 1.21 ppm (3H) Singlet at 2.30 ppm (3H) Quartet at 2.60 ppm (2H) Singlet at 7.04 ppm (4H) What is the structure of the compound? A) I B) II C) III D) IV E) V 16) Deduce the identity of the following compound from the spectral data given.
C5H10O: 1H NMR, δ 1.2 (6H, doublet), 2.1 (3H, singlet), 2.8 (1H, septet); IR, 2980, 1710 cm-1; MS, m/z 71, 4 22) Predict the number of signals in the 13C NMR spectrum for the following structure. A) 5 B) 6 C) 7 D) 8 E) 9 23) Give the structure for the compound that has a formula of C10H12O and the following 1H NMR and 13C NMR spectra.
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Label the hydrogens and the carbons. 1H NMR: 1.2 ppm (t, 3H); 2.3 ppm (s, 3H); 2.6 ppm (q, 2H), 7.2 ppm (d, 2H), and 7.8 ppm (d, 2H). 13C NMR: 7.0 ppm (CH3); 20.9 ppm (CH3); 32.0 ppm (CH2); 128.0 (CH), 129.1 ppm (CH), 134.0 ppm (C); 141.0 ppm(C); and 198.1 ppm (C).