Issue 9, 2002
From the journal:

Journal of the Chemical Society, Dalton Transactions

Crystal structure, electrochemical and spectroscopic properties of the trans-K{[FeCl(NO0)(cyclam)]·[FeCl(NO+)(cyclam)]2}(PF6)6 complex

Luiz G. F. Lopes,a   Eduardo H. S. Sousa,a   José C. V. Miranda,a   Cristiane P. Oliveira,a   Idalina M. M. Carvalho,a   Alzir A. Batista,b   Javier Ellena,c   Eduardo E. Castellano,c   Otaciro R. Nascimentoc  and  Ícaro S. Moreira*a  

* Corresponding authors

a Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Caixa Postal 12200, Campus do Pici, 60455-760 Fortaleza(CE), Brazil

b Departamento de Química da Universidade Federal de São Carlos, Rod. Washington Luiz, Km 235, 13565-905, São Carlos (SP), Brazil

c Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560 São Carlos (SP), Brazil

Abstract

The trans-K{[FeCl(NO0)(cyclam)]·[FeCl(NO+)(cyclam)]2}(PF6)6 complex was prepared from the reaction of trans-[Fe(cyclam)Cl2]Cl and nitric oxide. The molecular structure of the complex was determined by X-ray diffraction (space group P21/c; a = 10.3560(3) Å; b = 17.7110(6) Å; c = 17.9480(6) Å; β = 91.052(2)°). Crystal and spectroscopic evidence indicates the existence of two independent complexes with participation of different forms of nitric oxide: NO+ and NO0. The IR spectrum shows the presence of two ν(NO) stretching modes at 1863 and 1610 cm−1 which are characteristic of these NO species, respectively. Upon reduction by zinc amalgam, the ν(NO+) band at 1863 cm−1 disappears and the band at 1610 cm−1 becomes more intense. The EPR measurements indicate the presence of the NO0 group. No signal for paramagnetic species of Fe(III) was observed.

Graphical abstract: Crystal structure, electrochemical and spectroscopic properties of the trans-K{[FeCl(NO0)(cyclam)]·[FeCl(NO+)(cyclam)]2}(PF6)6 complex

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Article information

DOI
https://doi.org/10.1039/B111029B
Article type
Paper
Submitted
04 Dec 2001
Accepted
04 Mar 2002
First published
10 Apr 2002

J. Chem. Soc., Dalton Trans., 2002, 1903-1906

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Crystal structure, electrochemical and spectroscopic properties of the trans-K{[FeCl(NO0)(cyclam)]·[FeCl(NO+)(cyclam)]2}(PF6)6 complex

L. G. F. Lopes, E. H. S. Sousa, J. C. V. Miranda, C. P. Oliveira, I. M. M. Carvalho, A. A. Batista, J. Ellena, E. E. Castellano, O. R. Nascimento and Í. S. Moreira, J. Chem. Soc., Dalton Trans., 2002, 1903 DOI: 10.1039/B111029B

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