Mass-spectrometric study of the formation of cationic complexes of Fe, Co, Ni, Cr, Mn, Rh, Pd, Nd, Pr, Ga, In, and Tl with phenol-containing crown compounds in the gas phase
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It has been shown by mass spectrometry that 21-methoxy-19-methyl-3,6,9,12,15-pentaoxabicyclo[15.3.1]heneicosa-1(21),17,19-triene and its 21-hydroxylate react in the gas phase with cations containing atoms of Fe, Co, Ni, Cr, Mn, Rh, Nd, Pr, Ga, In, and Tl with the formation of ions havig new metal-macrocycle bonds. A characteristic feature of the 21-hydroxy derivative is the formation of σ-bonded complexes between the metal and the oxygen of the macrocycle.
The reactivity of the ions (acac)2M+ with respect to the macrocycles varies in the order M=Co > Fe > Cr > Pr, Ga, the relative yield of metal-containing ions with new metalmacrocycle bonds being higher for the methoxy-derivative than for the hydroxy analog.
KeywordsOxygen Mass Spectrometry Characteristic Feature Acac Macrocycle
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