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C=C Alchini (Acetileni)

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Saturazione<br />

Alcani -C-H Stretch – parecchi assorbimenti a “destra” of 3000 cm -1<br />

Metilene -CH 2 1450 cm -1<br />

Metile -CH 3 1375 cm -1<br />

Insaturazione<br />

Doppi legami =C-H Stretch – numerosi assorbimenti a “sinistra” di 3000 cm -1<br />

OOP (out of plane) bending a 1000 – 650 cm -1<br />

Alcheni (Vinilici) -<strong>C=C</strong>- Stretch (debole) ν 1675 – 1600 cm -1<br />

la coniugazione sposta gli assorbimenti a destra<br />

<strong>Alchini</strong> C≡C-H Stretch Acetilene Terminale a 3300 cm -1<br />

Alkynes (Acetylenes) -C≡C Stretch ν 2150 cm -1<br />

la coniugazione sposta gli assorbimenti a destra<br />

Aromatic (aryl) =C-H Stretch anche a sinistra di 3000 cm -1<br />

OOP bending a 900 – 690 cm -1<br />

-<strong>C=C</strong> 4 assorbimenti (2 coppie) ν 1600 & 1450 cm -1<br />

Overtone a ν 2000 – 1667 cm -1

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