Isotopes Bonds Isotope type Reduced mass (MAMB /(MA + MB)
12C-12C Lighter 6.00
13C-12C Heavier 6.24
1H-12C Lighter 0.923
1H-13C Heavier 0.928
12C-16O Lighter 6.85
13C-16O Heavier 7.17
16O-1H Lighter 0.94
16O-2H Heavier 1.77
Table 3: Possible isotopic bonds in ethanol.