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• W2102770883 endingPage "559" @default.
• W2102770883 startingPage "548" @default.
• W2102770883 abstract "Two lithium amine-bis(phenolate) and four chromium(III) amine-bis(phenolate) complexes have been prepared. The diprotonated tripodal tetradentate ligand precursors 2-tetrahydrofurfuryl-N,N-bis(2-methylene-4-methyl-6-tert-butylphenol), H2[O2NO]BuMe; 2-tetrahydrofurfuryl-N,N-bis(2-methylene-4,6-tert-butylphenol), H2[O2NO]BuBu; 2-pyridylamino-N,N-bis(2-methylene-4,6-methylphenol), H2[O2NN′]MeMe; and 2-pyridylamino-N,N-bis(2-methylene-4,6-tert-butylphenol), H2[O2NN′]BuBu; can be lithiated using n-butyllithium. Isolation of the Li2[O2NO]RR′ compounds generates dimeric {Li2[O2NO]RR′}2 (R = t-Bu, R′ = Me in 1 and R = R′ = t-Bu in 2) in the solid state as shown by single-crystal X-ray diffraction. The lithiated ligands were used to prepare a series of Cr(III) complexes. Monometallic complexes are obtained when prepared and purified under strictly anhydrous conditions, giving CrCl(THF)[O2NO]RR′ (R = t-Bu, R′ = Me in 3 and R = R′ = t-Bu in 4). However, bimetallic Cr complexes are obtained upon recrystallization in air, where adventitious water reacts with the complex resulting in protonation of one of the phenolate groups of the ligand and generating hydroxide, which bridges two Cr(III) centres. Solid-state single-crystal X-ray diffraction studies of {CrCl[O2NN′]MeMe}(μ-HO){CrCl[HO2NN′]MeMe}, 5, and {CrCl[O2NN′]BuBu}(μ-HO){CrCl[HO2NN′]BuBu}, 6, were performed. The paramagnetic Cr(III) complexes were also characterized by UV-vis spectroscopy, mass spectrometry and magnetic measurements." @default.
• W2102770883 created "2016-06-24" @default.
• W2102770883 creator A5004442092 @default.
• W2102770883 creator A5004948560 @default.
• W2102770883 creator A5021534472 @default.
• W2102770883 creator A5040071047 @default.
• W2102770883 creator A5054133177 @default.
• W2102770883 creator A5085374250 @default.
• W2102770883 date "2010-01-01" @default.
• W2102770883 modified "2023-09-25" @default.
• W2102770883 title "Structure and magnetic behaviour of mono- and bimetallic chromium(iii) complexes of amine-bis(phenolate) ligands" @default.
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