Abstract

S.S. Parmar¹, A. Aggarwal^2*, M.L. Sehgal³, Sunaina Singh² and Midas Tsai²

DOI : http://dx.doi.org/10.13005/ojc/360203

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), -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 conductances. The formation of three 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. 

Counter–Anion; Isoelectronic; Mono-Tertiary Arsine; Thermogravimetric

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