Synthesis, Coordination, and Spectroscopic Properties of 2,2′-Bipyridyldimesitylpalladium(II) and 6-Mesityl-2,2′-bipyridyldimesitylpalladium(II)

✍ Scribed by Axel Klein; Mark Niemeyer

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: German
• Weight: 100 KB
• Volume: 626
• Category: Article
• ISSN: 0372-7874
• DOI: 10.1002/(sici)1521-3749(200005)626:5<1191::aid-zaac1191>3.0.co;2-4

✦ Synopsis

The synthetic route to the dimesitylpalladium(II) complex [(bpy)PdMes 2 ] (1) (Mes = mesityl = 2,4,6-trimethyl phenyl) does not only give the desired compound but also the 6-mesityl-2,2'bipyridyldimesitylpalladium [(6-Mes-bpy)-PdMes 2 ] (2) complex and the free ligand 6,6'-dimesityl-2,2'-bipyridine in reasonable yields. Single crystals of 2 were examined by X-Ray diffraction. The compound reveals a sterically crowded molecular structure. An intramolecular p-stacking interaction was found between the mesityl substi-tuent on the bipyridine ligand and the adjacent mesityl ligand. The electrochemical behaviour of 1 and 2 together with a related compound was examined at various temperatures showing two reversible reduction reactions and reversible one-electron oxidation steps at low temperatures. The latter are assigned to Pd II /Pd III couples.