Metal Complexes of Hybrid Oxygen- Arsenic Ligands-VII IR, Reflectance and EPR Spectral Studies of Oxo-manganese (Ii)-Arsine Complexes Using Ligands from O-R2asc6h4co2h

This paper describes four oxo-manganese(II)-mono-tertiary arsine complexes: [Mn 2 O {(o-Ph 2 AsC 6 H 4 CO 2 ) 2 (H 2 O) 5 }.(H 2 O)](structure:4), [Mn 2 O(o-Ph 2 AsC 6 H 4 CO 2 ) 2 (H 2 O) 4 ], and two isomeric compounds of [Mn 2 O{(o-(p-tolyl) 2 AsC 6 H 4 CO 2 ) 2 }.(H 2 O) 4 ] (structure 5) by reacting Mn(O 2 CMe) 2 .nH 2 O, (where "n" represents the number of water molecules, n=0 and n= 4) with the ligands o-R 2 As C 6 H 4 CO 2 H having only the aryl substituents (R=Ph, p-tolyl).This work extends the argument further that deoxygenated anhydrous conditions are not a prerequisite to stabilize As(III)-Mn(II) bond with the hybrid (As-O) chelates.The prepared complexes were characterized by IR, reflectance and EPR spectral studies and were confirmed by elemental analysis and thermogravimetric studies for their structures.