The nitrido-encapsulated heterometallic cluster anions [Co10Rh(N)2(CO)21]3- (1), [Co10Rh2(N)2(CO)24]2- (2), and [Co11Rh(N)2(CO)24]2- (3), have been obtained by tailored redox-condensation reactions. These three anions are rare high-nuclearity mixed-metal clusters containing two interstitial nitrogen atoms. Their structures have been determined by single-crystal X-ray diffraction on their [NR4]+ salts (R = Me for 1 and 3, R = Et for 2) and their electrochemical and ESR properties have been studied in detail. Noteworthy, 1 has an unprecedented stereochemistry, that does not exhibits a close geometrical resemblance with the isoelectronic homometallic anion [Co11N2(CO)11(μ2-CO)10]3-; and 2, despite its even number of electrons, is a paramagnetic species.

Mixed Co-Rh nitrido-encapsulated carbonyl clusters. Synthesis, Solid-State Structure, and Electrochemical/EPR Characterization of the anions [Co10Rh(N)2(CO)21]3 , [Co10Rh2(N)2(CO)24]2- and [Co11Rh(N)2(CO)24]2-

COSTA, MICHELA;FUMAGALLI, ALESSANDRO;
2007-01-01

Abstract

The nitrido-encapsulated heterometallic cluster anions [Co10Rh(N)2(CO)21]3- (1), [Co10Rh2(N)2(CO)24]2- (2), and [Co11Rh(N)2(CO)24]2- (3), have been obtained by tailored redox-condensation reactions. These three anions are rare high-nuclearity mixed-metal clusters containing two interstitial nitrogen atoms. Their structures have been determined by single-crystal X-ray diffraction on their [NR4]+ salts (R = Me for 1 and 3, R = Et for 2) and their electrochemical and ESR properties have been studied in detail. Noteworthy, 1 has an unprecedented stereochemistry, that does not exhibits a close geometrical resemblance with the isoelectronic homometallic anion [Co11N2(CO)11(μ2-CO)10]3-; and 2, despite its even number of electrons, is a paramagnetic species.
Costa, Michela; DELLA PERGOLA, Roberto; Fumagalli, Alessandro; Laschi, Franco; Losi, Serena; Macchi, Piero; Sironi, Angelo; Zanello, Piero
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/1674183
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