Sample

Number of carbon atom

k [min−1]

R2

Adipic acid

6

0.00281

0.975

Maleic acid

4

0.00516

0.987

Fumaric acid

4

0.00544

0.999

Oxalic acid

2

0.0115

0.983

Formic acid

1

0.0172

0.955