TY - JOUR
T1 - 1,2,4,5-Tetra([5]trovacenyl)benzene
T2 - An organometallic tetraradical displaying pronounced electro- and magnetocommunication
AU - Elschenbroich, Christoph
AU - Schiemann, Olav
AU - Burghaus, Olaf
AU - Harms, Klaus
PY - 2005/4/28
Y1 - 2005/4/28
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=18544385675&partnerID=8YFLogxK
U2 - 10.1039/b418831b
DO - 10.1039/b418831b
M3 - Article
C2 - 15846429
AN - SCOPUS:18544385675
SN - 1359-7345
SP - 2149
EP - 2151
JO - Chemical Communications
JF - Chemical Communications
IS - 16
ER -