Help Which statement about spin-spin coupling in FALSE? Spin-spin coupling occur

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Which statement about spin-spin coupling in FALSE? Spin-spin coupling occurs between vicinal protons spin-spin coupling results in a peak being split in the same n + 1 peaks (where n is the number of protons on neighboring carbons). Spin-spin coupling is observable for protons separated by 4 bonds. protons that have the same chemical shift do not split each other's signals. Which of the following are useful in interpreting C-13 NMR spectra? Circle ALL that apply? Number of Peaks Chemical Shift. Splitting Patterns. Integration Peak intensity Peak Width The CMR spectrum of an unknown compound shows 4 absorptions and the PMR spectrum shows 4 absorptions. Which of the following compounds is the unknown compound? What is the MOST important think to remember when determining which bonds in a molecule will break when struck by an electron in a Mass Spectrometer? Carbon bromine bonds break easily. Alcohols easily dehydrate to form alkenes. Molecules fragments to give the most stable cations. Aromatic rings do not fragment easily. Molecules with odd molar masses contain nitrogen. In infrared spectroscopy, absorption of electromagnetic radiation results in transitions between energy levels. Vibrational electronic rotational nuclear ionic Which of the following BEST describes the bonding in methyl lithium? I II III I ⅈ I & III II & III

Explanation / Answer

11. a, b, e, 12. a, d,

13. a, c, d

14. a

15. f

10. c

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