Structural and spectral characterization of novel charge-transfer salts of polyoxometalates and the cationic ferrocenyl donor
摘要:
The first charge-transfer salts containing the cationic ferrocenyl donor cpFecpCH(2)N(+)(CH3)(3) and polyoxometalate accepters of the Lindqvist structural type (M(6)O(19)(2-); M = Mo, W) have been isolated in high yields (87-88%). The X-ray structure of the charge-transfer salt shows the close (interionic) interaction of the hydrogen atoms of the cyclopentadienyl ligand with the surface of the polyoxometalate. Furthermore, the UV-vis diffuse reflectance spectrum in the solid state indicates the presence of a new charge-transfer band at lambda(max) = 550 nm; and laser-flash photolysis spectroscopy establishes cpFe(+)cpCH(2)N(+)(CH3)(3) and M(6)O(19)(3-) as short-lived transients in the direct photoactivation of the charge-transfer salt.
Structural and spectral characterization of novel charge-transfer salts of polyoxometalates and the cationic ferrocenyl donor
摘要:
The first charge-transfer salts containing the cationic ferrocenyl donor cpFecpCH(2)N(+)(CH3)(3) and polyoxometalate accepters of the Lindqvist structural type (M(6)O(19)(2-); M = Mo, W) have been isolated in high yields (87-88%). The X-ray structure of the charge-transfer salt shows the close (interionic) interaction of the hydrogen atoms of the cyclopentadienyl ligand with the surface of the polyoxometalate. Furthermore, the UV-vis diffuse reflectance spectrum in the solid state indicates the presence of a new charge-transfer band at lambda(max) = 550 nm; and laser-flash photolysis spectroscopy establishes cpFe(+)cpCH(2)N(+)(CH3)(3) and M(6)O(19)(3-) as short-lived transients in the direct photoactivation of the charge-transfer salt.
A palladium-catalyzed difunctionalization of bicyclicalkenes with organoammonium salts and organoboronic compounds was reported. A wide range of functionalized cyclic products, including those bearing functional groups, were produced stereoselectively in good to excellent yields. The gram-scale experiment, one-pot operation, and synthetic application of β-borylated products further demonstrated the