Synthesis and Second-Order NLO Properties of Donor−Acceptor σ-Alkenyl Ruthenium Complexes
作者:Ping Yuan、Jun Yin、Guang-ao Yu、Quanyuan Hu、Sheng Hua Liu
DOI:10.1021/om0605736
日期:2007.1.1
The compounds p-R-C(6)H(4)-CHCH-CC-TMS (R = NO(2), N(CH(3))(2), OCH(3)) were obtained from Wittig olefination of TMS-CC-CH(2)PPh(3)Br with p-R-C(6)H(4)-CHO in THF, which can be desilylated to give p-R-C(6)H(4)-CHCH-CC-H. Treatment of RuHCl(CO)(PPh(3))(3) with p-R-C(6)H(4)-CHCH-CC-H produced RuCl(CO)(PPh(3))(2)(CHCH-CHCH-C(6)H(4)-R-p). The later complexes reacted with 4-phenylpyridine (PhPy), 2,6-(Ph(2)PCH(2))(2)C(5)H(3)N (PMP), and KTp (Tp = hydridotris(pyrazolyl)borate) to give RuCl(CO)(PhPy)(PPh(3))(2) (CHCH-CHCH-C(6)H(4)-R-p), RuCl(CO)(PMP)(CHCH-CHCH-C(6)H(4)-R-p), and RuTp(CO)(PPh(3)) (CHCH-CHCH-C(6)H(4)-R-p), respectively. The structure of RuTp(CO)(PPh(3))(CHCH-CHCH-C(6)H(4)-R-p) (R = N(CH(3))(2), 7b) has been confirmed by X-ray diffraction. The NLO properties (hyper-Rayleigh scattering measurements) of the complexes 5, 6, and 7 reveal that changes induced in the ligands of ruthenium (5a-7a or 5b,6b) have a large impact on the hyperpolarizability.