Abstract
A new phenol-based dinucleating ligand with two amino chelating arms, 2,6-bis{[N-(2-dimethylaminoethyl)-N-methyl]aminomethyl}-4-methylphenolate (L–), formed dinuclear manganese(II) complexes [Mn2L(p-XC6H4CO2)2(NCS)(MeOH)](X = H 1, Cl 2, Me 3 or NO24). X-Ray analysis revealed that complex 1 crystallizes in the monoclinic space group P21/c, a= 12.607(3), b= 19.566(6), c= 16.743(5)A and β= 107.56(2)°. The two magnese ions are bridged by the phenolic oxygen and two benzoate groups. The NCS– ion is co-ordinated to one of the maganese ions through its nitrogen and the methonal molecule to the other, providing distorted-octahedral geometries around each maganese. Magnetic susceptibility measurements over the temperature range 4.2–300 K indicated a weak antiferromagnetic interaction (J=–3 to –5 cm–1 based on Ĥ=–2JŜ1·Ŝ2). The complexes show a catalase-like activity in disproportionating H2O2 in dimethylformamide. The rate of dioxygen evolution was proportional to the concentration of H2O2 and the rate constant decreased in the order 1(X = H) > 2(Cl) > 3(Me) > 4(NO2).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
