Additive Character of Electron Donation by Methyl Substituents within a Complete Series of Polymethylated [1-(eta(6)-Me(n)C(6)H(6-n))-closo-1,2,3-FeC(2)B(9)H(11)] Complexes. Linear Correlations of the NMR Parameters and Fe(II/III) Redox Potentials with the Number of Arene Methyls

0366879 - ÚACH 2012 RIV US eng J - Článek v odborném periodiku
Štíbr, Bohumil - Bakardjiev, Mario - Holub, Josef - Růžička, A. - Padělková, Z. - Štěpnička, P.
Additive Character of Electron Donation by Methyl Substituents within a Complete Series of Polymethylated [1-(eta(6)-Me(n)C(6)H(6-n))-closo-1,2,3-FeC(2)B(9)H(11)] Complexes. Linear Correlations of the NMR Parameters and Fe(II/III) Redox Potentials with the Number of Arene Methyls.
Inorganic Chemistry. Roč. 50, č. 7 (2011), s. 3097-3102. ISSN 0020-1669. E-ISSN 1520-510X
Grant CEP: GA MŠMT LC523; GA ČR(CZ) GAP207/11/0705
Výzkumný záměr: CEZ:AV0Z40320502
Klíčová slova: organotransition-metal metallacarboranes * molecular-structure * crystal-structures * iron * carborane
Kód oboru RIV: CA - Anorganická chemie
Impakt faktor: 4.601, rok: 2011

A systematic method for the incorporation of the {(eta(6)-Me(n)C(6)H(6-n))Fe} fragment into the dicarbollide cage was developed based on reactions between [(eta(6)-Me(n)C(6)H(6-n),)(2)Fe][PF(6)](2) salts (1) and Tl(2)[nido-7,8-C(2)B(9)H(11)]. These reactions proceed with elimination of one arene ligand to generate a complete series of the neutral [1-(eta(6)-Me(n)C(6)H(6-n))-closo-1,2,3-FeC(2)B(9)H(11)] (2) complexes with n=1-6 in yields ranging 15 70% depending on the arene. Correlations between selected and (11)B NMR parameters and the Fe(II/III) redox potentials and the number of arene methyls for complexes 2 are linear. These facts establish direct evidence for a strictly additive character of electron donation by the methyl substituents to the arene ring and further to the Fe center and the second (dicarbollide) ligand.
Trvalý link: http://hdl.handle.net/11104/0006648