Six novel chiral dinuclear Salen complexes[Cu 2 L 1 ·H 2 O(3a),Cu 2 L 2 (3b),Ni 2 L 1 ·2H 2 O(4a),Ni 2 L 2 (4b),Mn 2 Cl 2 L 1 ·H 2 O(5a),Mn 2 Cl 2 L 2 (5b)]have been synthesized(L 1 and L 2 are chiral d...Six novel chiral dinuclear Salen complexes[Cu 2 L 1 ·H 2 O(3a),Cu 2 L 2 (3b),Ni 2 L 1 ·2H 2 O(4a),Ni 2 L 2 (4b),Mn 2 Cl 2 L 1 ·H 2 O(5a),Mn 2 Cl 2 L 2 (5b)]have been synthesized(L 1 and L 2 are chiral dimeric Salen ligands with different chain length which were synthesized from(R,R) - diaminocyclohexane,salicylaldehyde,4,4 ’- (1,10 - decaneoxy)sali - cylaldehyde,4,4 ’- (1,6 - hexyloxy)salicylaldehyde).These compounds were charactered by elemental analysis,1 H NMR,FT - IR,UV - Vis and CD spectra.The FT - IR,UV - Vis and CD spectra were discussed and compared with those of monomeric ligand and complex in detail.It was found that the spectra properties of compounds of differ - ent chain length were almost alike,and the properties of dimeric and monomeric compound were similar too.Furthermore Cotton effect and Cotton split of CD spectra of these chiral compounds were explained by the exciton interaction theory.It seemed that the direction of Cotton split depend on the configuration of diaminohexane.(R,R) - diaminohexane determine the chirality of Salen compounds as negative,and the positive and negative compo - nent of Cotton split lie at higher and lower energy respectively.展开更多
Five novel chiral dinuclear Salen complexes M2L (M = Fe3+Cl-, Mn3+Cl-, Co2+, Ni2+, Cu2+) and Ba2+-crown ether complex H4BaL(ClO4)2 were synthesized. The complexes were synthesized by reaction between ligand 3 (H4L) an...Five novel chiral dinuclear Salen complexes M2L (M = Fe3+Cl-, Mn3+Cl-, Co2+, Ni2+, Cu2+) and Ba2+-crown ether complex H4BaL(ClO4)2 were synthesized. The complexes were synthesized by reaction between ligand 3 (H4L) and corresponding metal salts (FeCl3, Mn(OAc)2·4H2O, Co(OAc)2·4H2O, Ni(OAc)2·4H2O, Cu(OAc)2·H2O, Ba(ClO4)2·2H2O). The chiral two discrete Salen ligand 3 was condensed from 3,3′-[Oxybis(2,l-ethanediyloxy)]bis(2-hydroxybenzaldehyde) and (R,R)-1,2-diamino-cyclohexane. The structure of complexes is two discrete Salen unit bridged with crown ether from two sides. We found that ligand 3 had three complex cites. The two N2O2 cavities can found complexes with d-metals (compound 4), while the O10 cavity can found complex with alkali metals and alkaline-earth metals (compound 5). The compounds were characterized by elemental analyses, 1H NMR, Mass-spectra, FT-IR, UV-Vis and CD spectra. The FT-IR, UV-Vis and CD spectra property of complexes were minutely analyzed.展开更多
文摘Six novel chiral dinuclear Salen complexes[Cu 2 L 1 ·H 2 O(3a),Cu 2 L 2 (3b),Ni 2 L 1 ·2H 2 O(4a),Ni 2 L 2 (4b),Mn 2 Cl 2 L 1 ·H 2 O(5a),Mn 2 Cl 2 L 2 (5b)]have been synthesized(L 1 and L 2 are chiral dimeric Salen ligands with different chain length which were synthesized from(R,R) - diaminocyclohexane,salicylaldehyde,4,4 ’- (1,10 - decaneoxy)sali - cylaldehyde,4,4 ’- (1,6 - hexyloxy)salicylaldehyde).These compounds were charactered by elemental analysis,1 H NMR,FT - IR,UV - Vis and CD spectra.The FT - IR,UV - Vis and CD spectra were discussed and compared with those of monomeric ligand and complex in detail.It was found that the spectra properties of compounds of differ - ent chain length were almost alike,and the properties of dimeric and monomeric compound were similar too.Furthermore Cotton effect and Cotton split of CD spectra of these chiral compounds were explained by the exciton interaction theory.It seemed that the direction of Cotton split depend on the configuration of diaminohexane.(R,R) - diaminohexane determine the chirality of Salen compounds as negative,and the positive and negative compo - nent of Cotton split lie at higher and lower energy respectively.
文摘Five novel chiral dinuclear Salen complexes M2L (M = Fe3+Cl-, Mn3+Cl-, Co2+, Ni2+, Cu2+) and Ba2+-crown ether complex H4BaL(ClO4)2 were synthesized. The complexes were synthesized by reaction between ligand 3 (H4L) and corresponding metal salts (FeCl3, Mn(OAc)2·4H2O, Co(OAc)2·4H2O, Ni(OAc)2·4H2O, Cu(OAc)2·H2O, Ba(ClO4)2·2H2O). The chiral two discrete Salen ligand 3 was condensed from 3,3′-[Oxybis(2,l-ethanediyloxy)]bis(2-hydroxybenzaldehyde) and (R,R)-1,2-diamino-cyclohexane. The structure of complexes is two discrete Salen unit bridged with crown ether from two sides. We found that ligand 3 had three complex cites. The two N2O2 cavities can found complexes with d-metals (compound 4), while the O10 cavity can found complex with alkali metals and alkaline-earth metals (compound 5). The compounds were characterized by elemental analyses, 1H NMR, Mass-spectra, FT-IR, UV-Vis and CD spectra. The FT-IR, UV-Vis and CD spectra property of complexes were minutely analyzed.
