Table 1 Results of the photo-irradiation of aromatic amines under CO2a.

From: Direct Photochemical C–H Carboxylation of Aromatic Diamines with CO2 under Electron-Donor- and Base-free Conditions

Run

Substrate

Metal

λmax (nm)

λex (nm)

Product

Yield(%)b

Φ(%)c

1d

Fe(II)

298

300 ± 10

54.1

0.44

2d

Fe(II)

298

—

N.D.e

—g

—g

3

Fe(II)

298

300 ± 10

58.0

0.47

4

—

298

300 ± 10

27.5

0.22

5

Fe(II)

291

289 ± 10

N.D.e

—g

—g

6

—

298

300 ± 10

trace

—g

7

Fe(II)

—f

— f

— f

— f

—f

8

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—

324

300 ± 10

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trace

—g

9

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Fe(II)

—f

—f

—f

—f

—f

  1. aReaction time: 8 h; light power: 63.5–66.9 mW (λex = 300 ± 10 nm) and 55.1 mW (289 ± 10 nm). bEstimated based on the amounts of used aromatic amines and absorbance of the products. cApparent quantum yield (%). dThe ex-situ-prepared Fe complex was used. eNot detected. fThe reaction was not investigated due to the formation of precipitates after mixing [FeII(H2O)6][ClO4]2 and 3 eq. of the substrates. gNot estimated.
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