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Di laman Kumpulan karbonil:
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- Spektroskopi inframerah : ikatan berganda C=O menyerap cahaya inframerah pada nombor gelombang antara kira-kira 1600 – 1900 cm −1 (5263 nm kepada 6250 nm). Lokasi sebenar penyerapan difahami dengan baik berkenaan dengan geometri molekul. Penyerapan ini dikenali sebagai "regangan karbonil" apabila dipaparkan pada spektrum penyerapan inframerah. [1] Di samping itu, spektrum propanone yang boleh dilihat dengan ultraungu dalam air memberikan penyerapan karbonil pada 257 nm. [2]
- Resonans magnetik nuklear : ikatan dua C=O mempamerkan resonans yang berbeza bergantung pada atom sekeliling, secara amnya anjakan medan bawah. NMR 13 C karbonil adalah dalam julat 160–220 ppm.[perlu rujukan]
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