Synthesis and reactivity of linear tetranuclear Mo2M2 (M = Ir, Pd) complexes

INOR 753

Asuka Shima, shima@ta30.chem.es.osaka-u.ac.jp, Masato Ohashi, and Kazushi Mashima, mashima@chem.es.osaka-u.ac.jp. Department of Chemistry, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan
Linearly aligned polynuclear compounds have attracted much interest in terms of not only fundamental bonding nature but also their potential applications, particularly, to nanoscale electronic devices. We have synthesized linear hetero polynuclear compounds using a tridentate ligand 6-diphenylphosphino-2-pyridonate (= pyphos, 1), which has three different elements O, N, and P as coordination sites supported linearly by rigid pyridonate framework and can arrange more than two kinds of metals. Herein we report the synthesis of a linear hetero tetranulear complex [Mo2Ir2(RNC)4(pyphos)4](Cl)2 (2, R = tBu, Xyl) and its unique reaction with MeI and I2: two Ir metal centers were oxidized by them to result in the formation of new two Mo-Ir bonds with the reduction of Mo-Mo bond order, as revealed by X-ray analysis. We also describe unique redox properties of a tetranuclear complex Mo2Pd2(pyphos)4 (3).

 

General Organometallic Chemistry
7:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Inorganic Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007