BCSJ : Vol. 80 (2007) , No. 1 pp.189-191

Tuning of Electronic Structures of Quasi-One-Dimensional Bromo-Bridged Pd^II–Pd^IV Mixed-Valence Complexes by Substituting Counter Anions

Hisamitsu Arakawa¹⁾, Daisuke Kawakami²⁾, Shinya Takaishi²⁾, Takashi Kajiwara²⁾, Hitoshi Miyasaka¹⁾, Ken-ichi Sugiura¹⁾, Masahiro Yamashita²⁾, Hideo Kishida³⁾ and Hiroshi Okamoto³⁾

1) Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University
2) Department of Chemistry, Graduate School of Science, Tohoku University & CREST(JST)
3) Department of Advanced Materials Science, Graduate School of Frontier Science, The University of Tokyo

(Received February 15, 2006)

New quasi-one-dimensional bromo-bridged Pd^II–Pd^IV mixed-valence complexes with long chain alkylsufonates [Pd(en)₂][PdBr₂(en)](C_nH_2n+1SO₃)₄·2H₂O (en = ethylenediamine, n = 7, 8, 9, and 10) were synthesized. With increasing alkyl-chain length (n) of the counter anions, the Pd^II···Pd^IV distances decreased, indicating that the oxidation states of the Pd atoms are close to the Pd^III state.