which-bonds-in-propoxybenzene-produce-the-two-c-o-stretching-bands-visible-in-it

Question

Which of the two C―O bonds in propoxybenzene produces a C―O stretching band at a higher wavenumber, and which produces a band at a lower wavenumber? What characteristic causes these bands to be intense?

Accepted Answer

The C(sp²)―O bond produces a C―O stretching band at a higher wavenumber, while the C(sp³)―O bond produces the band at a lower wavenumber. The polarity of the C―O bond causes these bands to be intense.

Answer

The C(sp²)―O bond produces a C―O stretching band at a higher wavenumber, while the C(sp)―O bond produces the band at a lower wavenumber. The strength of the C―O bond causes these bands to be intense.

Answer

The C(sp)―O bond produces a C―O stretching band at a higher wavenumber, while the C(sp³)―O bond produces the band at a lower wavenumber. The length of the C―O bond causes these bands to be intense.

Answer

The C(sp³)―O bond produces a C―O stretching band at a higher wavenumber, while the C(sp²)―O bond produces the band at a lower wavenumber. The strength of the C―O bond causes these bands to be intense.

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Which of the two C―O bonds in propoxybenzene produces a C―O stretching band at a higher wavenumber, and which produces a band at a lower wavenumber? What characteristic causes these bands to be intense?