1,2,4,5-Tetra([5]trovacenyl)benzene: An organometallic tetraradical displaying pronounced electro- and magnetocommunication

Christoph Elschenbroich, Olav Schiemann, Olaf Burghaus, Klaus Harms

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


The organometallic tetraradical 1,2,4,5-[(η7-C 7H7)V(η5-C5H4)] 4C6H2 has been prepared and structurally characterized. The isotropic EPR spectrum displays 29 a(51V) hyperfine lines, the intensity distribution slightly deviating from binomial. Exchange coupling therefore approaches the strong exchange limit, J ortho ≠ Jmeta ≠ Jpara, ≳50 a( 51V) with a(51V) = 0.0067 cm-1. According to magnetic susceptometry, the interaction is antiferromagnetic. While redox splittings δE1/2, are resolved for the four reduction steps this is not the case for oxidation.

Original languageEnglish
Pages (from-to)2149-2151
Number of pages3
JournalChemical Communications
Issue number16
StatePublished - 28 Apr 2005
Externally publishedYes


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