199485-64-8Relevant articles and documents
Probing the reactivity of oxomanganese-salen complexes: An electrospray tandem mass spectrometric study of highly reactive intermediates
Feichtinger, Derek,Plattner, Dietmar A.
, p. 591 - 599 (2001)
Electrospray ionization in combination with tandem mass spectrometric techniques has been employed to study the formation of oxomanganese-salen complexes upon oxidation of [MnIII(salen)]+ cations as well as the properties and reactions of the oxidized species in the gas phase. Two species could be characterized as the principal oxidation products: the oxomanganese(V) complex, [Mn=O(salen)]+, which is the actual oxygen-transfer agent in epoxidation reactions, and the dinuclear, μ-oxo bridged [L(salen)Mn-Q-Mn-(salen)L]2+ with two terminal ligands L; the latter acts as a reservoir species. The effects of various substituents in the 5-and 5′-positions, respectively, of the salen ligand on the reactivity of the epoxidation catalyst were determined quantitatively from CID (collision-induced dissociation) experiments and B3LYP density functional calculations. Accordingly, the effect of axial donor ligands on the reactivity of the epoxidation catalyst was studied. Electron-withdrawing substitutents on the salen ligand and additional axial ligands decrease the stability and thus enhance the reactivity of the Mn=O moiety, while electron-donating salen substituents have a strong stabilizing effect. WILEY-VCH Verlag GmbH, 2001.
Synthesis, X-ray structural characterization, and catalytic property of an end-to-end azido-bridged polymeric manganese(III) complex derived from N,N?-bis(5-fluorosalicylidene)-1,2-diaminoethane
Lei, Yan,Yang, Qiwen
, p. 446 - 449 (2017)
A new end-to-end azido-bridged polymeric manganese(III) complex [MnL(μ1,3-N3)]n with the Schiff base ligand N,N?-bis(5-fluorosalicylidene)-1,2-diaminoethane (H2L), has been synthesized and structurally characterized by physicochemical methods and single-crystal X-ray determination. Crystal of the complex crystallizes in orthorhombic space group Pca21, with a=10.8211(5), b=13.4644(6), c=11.1811(5)?, V=1629.08(13)?3, Z=4, R1=0.0255, wR2=0.0653, GOOF=1.053. X-ray analysis indicates that the complex is an end-to-end azido-bridged polymeric manganese species. The Mn atom is coordinated in an octahedral coordination by two phenolate O and two imine N atoms from the Schiff base ligand, and two azido N atoms. The catalytic property for epoxidation of styrene by the complex was evaluated.
Synthesis, Structures, and Antibacterial Activities of Two Methanol Coordinated Zinc Complexes with Tetradentate Bis-Schiff Bases
Cai
, p. 663 - 669 (2017)
Two methanol coordinated zinc(II) complexes, [Zn(L1)(MeOH)] (I) and [Zn(L2)(MeOH)] (II), where L1 and L2 are the dianionic form of N,N'-bis(5-fluorosalicylidene)ethane-1,2-diamine and N,N'-bis(5-fluorosalicylidene)propane-1,2-diamine, respectively, have been synthesized and characterized by physical chemical methods and single crystal X-ray diffraction (CIF files CCDC nos. 950907 (I) and 950908 (II)). Crystallographic data for I: triclinic, P1 ˉ , a = 8.8765(8), b = 9.6577(9), c = 10.5117(9) ?, α = 114.590(2)°, β = 91.648(3)°, γ = 97.114(3)°, V = 809.87(13) ?3, Z = 2, R1 = 0.0307, wR2 = 0.0698. Crystallographic data for II: orthorhombic, Pca21, a = 22.946(2), b = 7.6942(7), c = 9.6234(8) ?, V = 1699.0(2) ?3, Z = 4, R1 = 0.0320, wR2 = 0.0676. X-ray crystal structural study indicated that the coordination environment around each zinc(II) atom in the complexes is a five-coordinated distorted pyramid in which the apical position is occupied by a methanol oxygen atom, and the basal plane is defined by the nitrogen and oxygen donor atoms of the Schiff base ligand. The antibacterial activities of the complexes were assayed.
Enhancing single-molecule magnet behaviour through decorating terminal ligands in Dy2 compounds
Ma, Xiufang,Chen, Bingbing,Zhang, Yi-Quan,Yang, Jinhui,Shi, Quan,Ma, Yulong,Liu, Xiangyu
supporting information, p. 12622 - 12631 (2019/08/26)
The utilization of two isomorphic ligands with different substituents leads to two centrosymmetric DyIII dimers, namely, [Dy2(bfbpen)2(H2O)2]·2I- (1) and [Dy2(bcbpen)2
