Chromium(IV)-peroxo complex formation and its nitric oxide dioxygenase reactivity.
Chromium(IV)-peroxo complex formation and its nitric oxide dioxygenase reactivity.
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DOI：
10.1021/ja307384e
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发表时间：
2012-09-19
影响因子：
15
通讯作者：
Nam W
中科院分区：
文献类型：
--
作者：
Yokoyama A;Han JE;Cho J;Kubo M;Ogura T;Siegler MA;Karlin KD;Nam W
本文报道了含12元四氮杂大环TMC配体的铬(II)配合物[CrII(12-TMC)(Cl)]+(1)及其过氧衍生物[CrIV(12-TMC)(O2)(Cl)]+(2)的O2和NO反应性。与以前报道的铬(III)-过氧络合物[CrIII(14-TMC)(O2)(Cl)]+不同，在1和O2的反应中形成了铬(IV)-过氧络合物(2)。全光谱和X-射线分析表明，2具有侧向的η-2-过氧键。2与NO的定量反应降低了铬的氧化态，生成了铬(III)-硝基络合物[CrIII(12-TMC)(NO3)(Cl)]+(3)。后者建议通过过氧亚硝酸铬(III)中间体生成。还可以合成由1和NO衍生的铬(II)-亚硝基配合物[CrII(12-TMC)(NO)(Cl)]+(4)，但它不与O2反应。
The O2 and NO reactivity of a Cr(II) complex bearing a 12-membered tetraazamacrocyclic TMC ligand, [CrII(12-TMC)(Cl)]+ (1), and the NO reactivity of its peroxo derivative, [CrIV(12-TMC)(O2)(Cl)]+ (2), are described. By contrast to the previously reported Cr(III)-superoxo complex, [CrIII(14-TMC)(O2)(Cl)]+, a Cr(IV)-peroxo complex (2) is formed in the reaction of 1 and O2. Full spectroscopic and X-ray analysis reveals that 2 possesses a side-on η2-peroxo ligation. A quantitative reaction of 2 with NO affords a reduction in Cr oxidation state and production of a Cr(III)-nitrato complex, [CrIII(12-TMC)(NO3)(Cl)]+ (3). The latter is suggested to form via a Cr(III)-peroxynitrite intermediate. A Cr(II)-nitrosyl complex, [CrII(12-TMC)(NO)(Cl)]+ (4), derived from 1 andNO could also be synthesized; however, it does not react with O2.
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影响因子：
4.6
作者：
HEMPEL, JC;MORGAN, LO;LEWIS, WB
通讯作者：
LEWIS, WB
影响因子：
18.3
作者：
Cho, Jaeheung;Sarangi, Ritimukta;Wonwoo Nam
通讯作者：
Wonwoo Nam
影响因子：
4.9
作者：
Kurtikyan, Tigran S.;Ford, Peter C.
通讯作者：
Ford, Peter C.
影响因子：
64.8
作者：
Cho, Jaeheung;Jeon, Sujin;Wilson, Samuel A.;Liu, Lei V.;Kang, Eun A.;Braymer, Joseph J.;Lim, Mi Hee;Hedman, Britt;Hodgson, Keith O.;Valentine, Joan Selverstone;Solomon, Edward I.;Nam, Wonwoo
通讯作者：
Nam, Wonwoo
影响因子：
15
作者：
Kurtikyan, Tigran S.;Eksuzyan, Shahane R.;Goodwin, John A.
通讯作者：
Goodwin, John A.