: The reaction of [Co6C(CO)15]2- with 2 equiv of PtCl2(Et2S)2 affords the new heterobimetallic [Co8Pt4C2(CO)24]2-, [1]2-, carbonyl cluster. [1]2- undergoes reversible chemical and electrochemical oxidation and reduction processes disclosing a complete series of [1]n- (n ) 1-4) clusters. The mono- and dianion of [1]n- have been isolated as their tetra-substituted ammonium salts and fully characterized by means of IR, 13C NMR, ESI-MS, and X-ray crystallography. Variable-temperature (VT) solid-state EPR studies on pure crystalline samples indicate that both [1]2- and [1]-• are paramagnetic, due to a doublet state of the latter and a triplet state of [1]2-. This conclusion is supported by SQUID measurements on the same crystalline sample of [1]2-. The present study indisputably demonstrates that even-electron transition metal carbonyl clusters (TMCC) can be magneti

Magnetic Behavior of Odd- and Even-Electron Metal Carbonyl Clusters: the Case Study of [Co8Pt4C2(CO)24]n– (n = 1, 2) Carbide Cluster / C. Femoni; M. C. Iapalucci; G. Longoni; J. Wolowska; S.Zacchini; P. Zanello; S. Fedi; M. Riccò; D. Pontiroli; M. Mazzani. - In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - ISSN 0002-7863. - 132(2010), pp. 2919-2927. [10.1021/ja907608c]

Magnetic Behavior of Odd- and Even-Electron Metal Carbonyl Clusters: the Case Study of [Co8Pt4C2(CO)24]n– (n = 1, 2) Carbide Cluster

RICCO', Mauro;PONTIROLI, Daniele;MAZZANI, Marcello
2010

Abstract

: The reaction of [Co6C(CO)15]2- with 2 equiv of PtCl2(Et2S)2 affords the new heterobimetallic [Co8Pt4C2(CO)24]2-, [1]2-, carbonyl cluster. [1]2- undergoes reversible chemical and electrochemical oxidation and reduction processes disclosing a complete series of [1]n- (n ) 1-4) clusters. The mono- and dianion of [1]n- have been isolated as their tetra-substituted ammonium salts and fully characterized by means of IR, 13C NMR, ESI-MS, and X-ray crystallography. Variable-temperature (VT) solid-state EPR studies on pure crystalline samples indicate that both [1]2- and [1]-• are paramagnetic, due to a doublet state of the latter and a triplet state of [1]2-. This conclusion is supported by SQUID measurements on the same crystalline sample of [1]2-. The present study indisputably demonstrates that even-electron transition metal carbonyl clusters (TMCC) can be magneti
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2312991
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