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0IntroductionMolecularsquaresandrectangleswithmetalcor鄄nersandunsaturatedligandsideshavebecomearep鄄resentativeclassof“supramolecular”species[1].Inad鄄ditiontotheremarkableself鄄assemblyformationreac鄄tionsandtheunusualstructures,thesesystemshavebeenre 相似文献
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Karla-Alejandra Lpez-Gastlum Enrique F. Velzquez-Contreras Juventino J. García Marcos Flores-Alamo Gerardo Aguirre Daniel Chvez-Velasco Jayanthi Narayanan Fernando Rocha-Alonzo 《Molecules (Basel, Switzerland)》2021,26(23)
Two new glycine-Schiff base copper(II) complexes were synthesized. Single crystal X-ray diffraction (SCXRD) allowed us to establish the structure of both complexes in the solid state. The glycine-Schiff base copper(II) complex derived from 2′-hydroxy-5′-nitroacetophenone showed a mononuclear hydrated structure, in which the Schiff base acted as a tridentate ligand, and the glycine-Schiff base copper(II) complex derived from 2′-hydroxy-5′-methylacetophenone showed a less common tetranuclear anhydrous metallocyclic structure, in which the Schiff base acted as a tetradentate ligand. In both compounds, copper(II) had a tetracoordinated square planar geometry. The results of vibrational, electronic, and paramagnetic spectroscopies, as well as thermal analysis, were consistent with the crystal structures. Both complexes were evaluated as catalysts in the olefin cyclopropanation by carbene transference, and both led to very high diastereoselectivity (greater than 98%). 相似文献
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Treatment of p-tert-butylcalix[6]areneH6 (H6L) with [Mo(OBut)2{[2,2′-(N)-C6H4]2(CH2CH2)}] in refluxing toluene affords, after work-up, the complex [Mo(2-NC6H4CH2CH2C6H4NHC(Me)NH-2/)LH2]·4MeCN (1), which contains an 11-membered metallocyclic ring as characterised by Synchrotron X-radiation. 相似文献
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The ruthenium unit was introduced into the redox-active molecular polygon to assembly new Ru-Fc metallocycles (Compound 1), in which the redox active (ferrocene) and fluoresecent (ruthenium) signaling subunits are directly attached by the putative cation-binding sites. The compound 1 displayed high selectivity for Ca^2 by electrochemical tests. The measurements of the fluorescence spectra on titration of 1 with Ca^2 , Li^ , Na^ , K^ , Mg^2 or Ba^2 ion indicate the unique ability of 1 to detect Ca^2 ions selectively. 相似文献
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