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Reactions of Mn(O2CMe)2. nH2O (n = 0 and 4) with the ligand o-R2AsC6H4CO2H (where, R = alkyl substituent such as -CH3 (Me), -C2H5 (Et), and -C6H11) formed nine oxomanganese (II)-arsine oxide complexes: [Mn2O{(o-R2As(O)C6H4CO2)2(H2O)n}. n' H2O] {R = -Me, n = 3; n' = 0 (three isomers); R = -Et, n = 3, n' = 0; n = 5, n' = 1, 2; R = -C6H11, n = 5, n' = 0 (two isomers), n = 1, n' = 0} in the presence of both moisture and oxygen. The prepared complexes were characterized by IR, UV-Vis, and EPR spectroscopic techniques and were further confirmed by measuring their magnetic susceptibility, thermal and molar conductance. The formation of two different types of complexes was due to the difference in the inductive effect of aryl and the alkyl substituent and the change of the counter-anion, i.e., chloride and acetate and their role significantly helped in deciding the formation of oxomanganese(II)-arsine oxide or oxomanganese(II)-arsine complexes.


This article is distributed under a Creative Commons Attribution 4.0 International (CC- BY) license.

Originally published: Parmar, S.S., A. Aggarwal, M.L. Sehgal, S. Singh, and M. Tsai. Oxomanganese (II)-Arsine Oxide Complexes from o-R2AsC6H4CO2H Ligands: Role of Inductive Effect and Reaction Conditions in Stabilizing Manganese (II)-Arsine Complexes. Oriental Journal of Chemistry, 2020, vol. 36, no. 2, pp. 229-236, doi:10.13005/ojc/360203.



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