Homework Answers
Ques (1) proton on benzene has largest chemical shift because due to pie electrons in benzene ring current also produce which deshield the proton hence larger chemical shift. So option 2 is correct
Ques(2) small magnetic field of proton on neighbouring carbon atoms interacting with applied magnetic field which cause spin spin splitting because due to different possible arrangements of protons on two adjacent carbon protons magnitude of shielding and deshielding vary hence splitting occur so option 3 is right
Ques(3) option 4 is right because in ppm value of chemical shift of particular proton remain same regardless of frequency used.
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In general, which of the following has...
please answer all 6 points breakout. (a-f) 13. (16 pts) Compound P was a pleasant smelling,...
please answer all 6 points breakout. (a-f)
13. (16 pts) Compound P was a pleasant smelling, colorless liquid with a boiling point of 218 degrees C. It had no effect on either red or blue litmus paper. A mass spectrum of Compound showed a molecular ion at 134 with a base peak at 105. When an ir spectrum was taken as a liquid film of Compound P, an intense peak was observed at 1683 cm. Both proton nmr and carbon-13...
QUESTION 1 Answer all parts (a) Give an explanation of the variation in chemical shifts of...
QUESTION 1 Answer all parts (a) Give an explanation of the variation in chemical shifts of the aromatic carbons in the 130C NMR spectrum of methoxybenzene. Note that the 13C chemical shift of benzene is 128 ppm Carbon Chemical Shift (ppm) CH 160 114 130 120 15 Marksl (b) Natural abundance 3C NMR spectra of organic compounds are routinely measured in the proton decoupled mode. What is the advantage of using this technique? What information about molecular structure is lost...
Question 1 Which of the compounds below fit the following C-13 NMR? Singlet 126ppm, Singlet 129ppm,...
Question 1 Which of the compounds below fit the following C-13 NMR? Singlet 126ppm, Singlet 129ppm, Singlet 130ppm and a Singlet at 134ppm. chlorobenzene meta-dichlorobenzene para-dichlorobenzene ortho-dichlorobenzene Question 5 What happens to protons when they are not in an electromagnetic field? What happens when they are Answer for blank # 1: The nuclei of protons has a characteristic spin i=1/2 Answer for blank # 2: when present in the field two pin states exist (1/2, and -1/2) Question 5 What...
pretty please answer all tbe parts to question 5!! I'll make sure to thumbs up your...
pretty please answer all tbe parts to question 5!! I'll make
sure to thumbs up your response!
5) a) How many aromatic 'H NMR signals would be expected for 2-bromo-3-methylanisole? (0.5 pts.) b) What would the expected 'H NMR chemical shift be for the protons of the OCH, group? (0.5 pts.) c) Proceeding in a clockwise direction, label each unique hydrogen atom on the aromatic ring using the labels H, through H., if needed. If the hydrogens are chemically shift...
please complete the questions has not answering with clarification of the answer to any page Name...
please complete the questions has not answering with
clarification of the answer to any page
Name Lab Section _Date The Mole Concept and Atomic Weights The purpose of this activity is to better understand the concepts of relative atomic mass, counting by weighing and the mole. Percent composition and average atomic mass are included. Part I. Relative Atomic Masses and the Mole - Early Method When John Dalton proposed his atomic theory, he stated that the atoms of each element...
choose correct answer. no explanation needed QUESTION 10 How do astrophysicists account for neutrino emission from...
choose correct answer. no explanation needed
QUESTION 10 How do astrophysicists account for neutrino emission from the Sun? Solar flares create neutrinos with very energetic magnetic fields. Convection releases neutrinos, which random walk through the radiation zone. Fission in the Sun's core creates neutrinos when protons turn into neutrons. The annihilation of positrons and electrons in the core produces neutrinos. Fusion in the Sun's core creates neutrinos when protons turn into neutrons, QUESTION 11 How does the interstellar medium impact...
please answer all 6 points breakout. (a-f)
13. (16 pts) Compound P was a pleasant smelling, colorless liquid with a boiling point of 218 degrees C. It had no effect on either red or blue litmus paper. A mass spectrum of Compound showed a molecular ion at 134 with a base peak at 105. When an ir spectrum was taken as a liquid film of Compound P, an intense peak was observed at 1683 cm. Both proton nmr and carbon-13...
QUESTION 1 Answer all parts (a) Give an explanation of the variation in chemical shifts of the aromatic carbons in the 130C NMR spectrum of methoxybenzene. Note that the 13C chemical shift of benzene is 128 ppm Carbon Chemical Shift (ppm) CH 160 114 130 120 15 Marksl (b) Natural abundance 3C NMR spectra of organic compounds are routinely measured in the proton decoupled mode. What is the advantage of using this technique? What information about molecular structure is lost...
Question 1 Which of the compounds below fit the following C-13 NMR? Singlet 126ppm, Singlet 129ppm, Singlet 130ppm and a Singlet at 134ppm. chlorobenzene meta-dichlorobenzene para-dichlorobenzene ortho-dichlorobenzene Question 5 What happens to protons when they are not in an electromagnetic field? What happens when they are Answer for blank # 1: The nuclei of protons has a characteristic spin i=1/2 Answer for blank # 2: when present in the field two pin states exist (1/2, and -1/2) Question 5 What...
pretty please answer all tbe parts to question 5!! I'll make
sure to thumbs up your response!
5) a) How many aromatic 'H NMR signals would be expected for 2-bromo-3-methylanisole? (0.5 pts.) b) What would the expected 'H NMR chemical shift be for the protons of the OCH, group? (0.5 pts.) c) Proceeding in a clockwise direction, label each unique hydrogen atom on the aromatic ring using the labels H, through H., if needed. If the hydrogens are chemically shift...
please complete the questions has not answering with
clarification of the answer to any page
Name Lab Section _Date The Mole Concept and Atomic Weights The purpose of this activity is to better understand the concepts of relative atomic mass, counting by weighing and the mole. Percent composition and average atomic mass are included. Part I. Relative Atomic Masses and the Mole - Early Method When John Dalton proposed his atomic theory, he stated that the atoms of each element...
choose correct answer. no explanation needed
QUESTION 10 How do astrophysicists account for neutrino emission from the Sun? Solar flares create neutrinos with very energetic magnetic fields. Convection releases neutrinos, which random walk through the radiation zone. Fission in the Sun's core creates neutrinos when protons turn into neutrons. The annihilation of positrons and electrons in the core produces neutrinos. Fusion in the Sun's core creates neutrinos when protons turn into neutrons, QUESTION 11 How does the interstellar medium impact...
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