New Trans-Configured Acetylide-Cyanide Platinum(II) Anions: Spectroscopic and Optical Studies

作者：Berenguer Jesus R; Fernandez Julio^*; Lalinde Elena; Sanchez Sergio

来源：Organometallics, 2013, 32(3): 835-845.

DOI：10.1021/om301134k

A novel series of phosphorescent stable mixed acetylide-cyanide anionic (NBu4)(2)[trans-Pt(C CR)(2)(CN)(2)] (R = Tol (1), C6H4CF3-4 (2), C5H4N-4 (3), Np (4)) complexes were prepared by reactions of the neutral [trans-Pt(C CR)(2)(PPh3)(2)] precursors with excess (NBu4)CN. The formation of 1-4 takes place through monoanionic [trans-Pt(C CR)(2)(CN)(PPh3)](-) intermediate species, as confirmed by the isolation of the naphthyl derivative (NBu4)[trans-Pt(C CNp)(2)(CN)(PPh3)] (5). Further substitution of PPh3 in 5 by (CNBu)-Bu-t gives (NBu4)[trans-Pt(C CNp)(2)(CN)-((CNBu)-Bu-t)], containing three different isoelectronic ligands. The complexes have been characterized (H-1, C-13, Pt-195 NMR, IR, MALDI-TOF), including X-ray crystallography for 2, 4, and 6, and their spectroscopic and optical properties compared to those of the related homoleptic [Pt(C CR)(4)](2-) complexes. Time-dependent density functional theory (TD-DFT) calculations were performed for anions 1(2-) and 4(2-) and three different conformers of 6(-) to provide further insight into the nature of the electronic transitions.

• 出版日期2013-2-11