Question

Chemists inexplicably draw vectors on these systems in the opposite direction as physicists. For 10 points each:
[10m] Name these physical systems. A “permanent” one established at a carbonyl (“car-buh-NEEL”) bond is responsible for the intermolecular attractive force between two ketones.
ANSWER: electric dipoles [or dipole moments; prompt on poles or polarity]
[10e] Since this is a chemistry bonus, the carbonyl dipole moment points from carbon to oxygen, in the direction of increasing this quantity. Oxygen rates 3.5 on this quantity’s Pauling scale.
ANSWER: electronegativity
[10h] If it reacts with this biological carbene, a carbonyl’s dipole moment vector flips. Cells need the pyro·phosphate form of this coenzyme, a nitrogen-sulfur ylide (“ILL-id”), to turn pyruvate into acetyl-CoA (“uh-SEE-till coh A”).
ANSWER: thiamine [or vitamin B1; or thiamine pyrophosphate or TPP; prompt on vitamin B or B vitamins; prompt on vitamins]
<Adam Silverman, Science - Chemistry&gt; ~22799~ &lt;Editor: Adam Silverman>

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