Palladium(II) and platinum(II) complexes bearing a kappa(3)SCS pincer ligand with an azulene unit.
Novel Pd and Pt SCS-pincer complexes with an azulene unit were synthesized from the reaction of a metal precursor with an azulene molecule having two thioamide moieties. The crystal structures of the complexes were confirmed by X-ray diffraction analysis. Their structural and optical properties were investigated in comparison with those of related complexes with a benzene and pyrrole unit by NMR and UV/Vis spectroscopy. DFT calculations for the azulene complexes revealed that the origin of the long-wavelength absorption is assigned to a transition from the metal center to the extended pi system of the azulene unit.
Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba 305-8573, Japan.
Junpei
J
Kuwabara
Goro
G
Munezawa
Ken
K
Okamoto
Takaki
T
Kanbara