Exam 2 Flashcards
(15 cards)
Which type of reaction needs concentrated H2SO4 with heat?
E1
Which type of reaction uses NaOCH2CH3, HOCH2CH3, and heat?
E2 (Grab, slam, boot)
Which type of reaction is needed for a primary alcohol?
E2 (if no rearrangement) and E1 (if rearrangement)
Which type of reaction uses PBr3 and SOCl2, pyridine
Sn2
A multiplicity of quartet/triplet is consistent with which alkyl branch?
Ethyl
When an atom is “deshielded,” it’s signal wil show up more (UPFIELD/DOWNFIELD) because it is (CLOSE TO/FAR FROM) an electronegative atom.
downfield, close to
Whenever you see 9 or a multiple of 9 in the integration ratio, which group should you first consider for being responsible for that signal?
tert-butyl
Whenever you see a quartet and triplet on a spectrum, which group should you first consider for being responsible for those signals?
Ethyl
Whenever you see septet and a doublet on a spectrum, which group should you first consider for being responsible for those signals?
isopropyl
Whenever you see 6 or a multiple of 6 in the integration ratio, which group should you first consider for being responsible for that signal?
isopropyl
Whenever you see 3 as the actual number of protons for a given signal, which group should you first consider for being responsible for that signal?
methyl
The more substituted the free radical the ____ stable
More
When you see a singlet on a H-NMR what are two possible groups?
Alcohol and methyl
What kind of hydrogen shows up in the 4.5 -6.5 range?
vinyl hydrogens (hydrogens around a double bond)
What kind of hydrogen shows up in the 6.5 - 8.5 range?
aryl hydrogens (benzene)
