Table 1 Mass differences used as edges in the molecular network to connect all annotated formulas.

From: C2-addition patterns emerging from acetylene and nickel sulfide in simulated prebiotic hydrothermal conditions

Possible reaction

Elemental difference

Exact mass difference (u)

Water addition

+ H2O

18.01057

Hydrogen sulfide addition

+ H2S

33.98772

Dimerization/Oligomerization

+ C2H2

26.01565

Carbonylation (with H2O)

+ CH2O2

46.00548

Carbonylation (with H2S)

+ CH2OS

61.98264

Reduction

+ H2

2.01565

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