Mechanism of Reduction of the Nitrite Ion by Cu I Complexes
The reaction of Cu + aq with NO 2 − was studied. The results are consistent with the mechanism: Cu + aq + NO 2 − → ← (Cu + NO 2 − ), K = 140 ± 30 M −1 ; (Cu + NO 2 − ) + H + → Cu 2+ + NO + OH − , k = 4.6 × 10 5 M −1 s −1 . It is proposed that the copper is bound to the nitrogen in the transient comp...
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| Veröffentlicht in: | European journal of inorganic chemistry 2004-09, Vol.2004 (18), p.3675-3680 |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The reaction of Cu
+
aq
with NO
2
−
was studied. The results are consistent with the mechanism: Cu
+
aq
+ NO
2
−
→
←
(Cu
+
NO
2
−
),
K
= 140 ± 30
M
−1
; (Cu
+
NO
2
−
) + H
+
→ Cu
2+
+ NO + OH
−
,
k
= 4.6 × 10
5
M
−1
s
−1
. It is proposed that the copper is bound to the nitrogen in the transient complex (Cu
+
NO
2
−
). In addition, the reaction was studied with (Cu
I
L
i
)
+
complexes. The results show that the ligands reduce the value of
K
and that their effect on
k
depends on the redox potential of the (Cu
II/I
L
i
) couple. This reaction is the simplest model for the CuNIR (NIR = Nitric reductase) enzymes. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) |
|---|---|
| ISSN: | 1434-1948 1099-0682 |
| DOI: | 10.1002/ejic.200400255 |