| 17029374 |
Zhang QF, Ding J, Yu Z, Song Y, Rothenberger A, Fenske D, Leung WH: Syntheses, structures, and nonlinear optical properties of heteroselenometallic W-Se-Ag cluster compounds containing phosphine ligands. Inorg Chem. 2006 Oct 16;45(21):8638-47.
Treatment of [Et4N] 2 [WSe4] with a 1:1 mixture of AgNO3 and PCy3 (Cy = cyclohexyl) in the absence of iodide afforded a linear trinuclear compound [(mu-WSe4)(AgPCy3) 2] (1). A similar reaction in the presence of iodide gave rise to the isolation of the cubanelike compound [(mu3-WSe4) Ag3 (PCy3) 3 (mu3-I)] (2). Treatment of [Et4N] 2 [WSe4] with AgI in the presence of bidentate phosphine ligands bis (diphenylphosphino) amine (dppa) and bis (diphenylphosphino) methane (dppm) afforded the tetranuclear compounds [(mu3-WSe4) Ag3 (mu-I)(mu-dppa) 2] (3) and [(mu3-WSe4) Ag3 (mu3-I)(mu-dppm) 2] (4), respectively, which exhibit an open butterfly configuration. A novel hexanuclear cluster compound [(mu3-WSe4) 2Ag4 (mu-dppm) 3] (5) was obtained from interaction of [Et4N] 2 [WSe4] with AgNO3 and dppm in the absence of iodide source. The above cluster compounds are electrically neutral and air-stable in both solution and the solid state and have been characterized by electronic, infrared, mass, and NMR spectroscopies. The solid-state structures of five cluster compounds have been established by X-ray crystallography. The nonlinear optical properties of compounds 4 and 5 were examined by z-scan techniques with 7 ns pulses at 532 nm. The optical limiting effects of compounds 1, 2, 4, and 5 were determined and compared with related argentoselenometallic compounds. |
31(0,1,1,1) |