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What is a hypsochromic shift?

  • A.A decrease in absorption intensity
  • B.A shift to shorter wavelength
  • C.A shift to longer wavelength
  • D.An increase in absorption intensity

Answer: B

Hypsochromic, or blue, is a shift to shorter wavelength and hence higher energy, while bathochromic is the shift the other way. Intensity changes are hyperchromic and hypochromic. Four terms covering two independent axes, and since a change of solvent or substituent typically moves a band on both at once, all four are needed to describe what happened.

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