The hyperfine structure of sugars investigated by microwave spectroscopy and quantum chemical calculations

Nuclear spin-spin coupling hyperfine structure F1′F′←F1‴F‴ of the rotational Jkakc′←Jkakc″=717←624 transitions of glycolaldehyde. Each hyperfine transition has a double peaked line profile resulting of the Doppler shift. Vertical sticks represent the calculated transitions.