Cuadro de absorciones ir

| ENLACE |GRUPO FUNCIONAL |RANGO DE ABSORCION |
| ||EN NUMERO DE ONDA |
| | | ||C-C |Alcano |3000-2850 cm-1 |
|C-C |Alcano|1470-1450 cm-1 |
|C-H (metilo) |Alquilo |1370-1350 cm-1 ||C-H (cadenas largas metilo) |Alquilo |725-720 cm-1 |
|C=C |Alqueno|1680-1640 cm-1 |
|=C-H |Alqueno |3100-3000 cm-1 |
|=C-H|Alqueno |1000-650 cm-1 |
|-C [pic]C- |Alquino|2260-2100 cm-1 |
|-C [pic]C-H |Alquino |3330-3270 cm-1 |
|-C[pic]C-H |Alquino |700-610 cm-1 |
|CH2-X |Halogenuro de Alquilo|1300-1150 cm-1 |
|C-Cl |Halogenuro de Alquilo |850-550 cm-1 |
|C-Br...