On Biomimetics by Lilyana Pramatarova

Iron and Manganese-Containing Flavonol 2,4-Dioxygenase Mimics
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Fig. 3. Formation of manganese(II) and iron(III) flavonolate complexes.

Complex

M–O (Å)

 (Å)

IR,

CO(cm-1)

UV-vis,

(nm)

(log )

Cu(fla) 2 a

Cu1–O1

Cu1–O2

1.942(2)

1.900(2) 0.042 1536 433 (4.56)

Mn(fla) 2 (py) 2 b

Mn1–O1

Mn1–O2

2.1839(18)

2.1274(16) 0.057 1542 433 (4.14)

[Mn(6Ph 2 TPA)(fla)]+c

Mn1–O1

Mn1–O2

2.143(3)

2.121(3) 0.022 1550 431 (4.24)

Fe(4’MeOfla) 3 b Fe1–O1

Fe1–O2

2.109(8)

1.955(7)

0.154 1547 411 (4.68)

Fe(fla)(salen)d Fe1–O1

Fe1–O2

2.139(4)

1.955(4)

0.184 1549 407 (4.25)

Fe(4’Clfla)(salen)d 1547 411 (4.15)

Fe(4’MeOfla)(salen)d 1542 445 (4.25)

Fe(4’NMe 2 fla)(salen)d 1536 426 (4.56)

Table 1. Spectroscopic and structural data for synthetic ES type complexes: a(Pap et al.,
2010); b(Kaizer et al, 2007); c(Grubel et al., 2010); d(Baráth et al., 2009).

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