New paramagnetic tin(IV) complexes based on o-iminoquinone ligands: Synthesis and thermal transformation

Abstract

A series of new paramagnetic tin(IV) complexes based on sterically hindered o iminobenzoquino nes (R)ImQ differed in fragments (R) in the N aryl fragment is synthesized. The thermal transformation of the tin(IV) complex, (iso Pr)ImSQSn(tert Bu) 2 Cl ((iso Pr)ImSQ is the radical anion of 4,6 di tert butyl N (2,6 di iso propylphenyl) o iminobenzoquinone), is studied. The thermal transformation of the paramag netic complex in nonane results in the formation of a new tin(II) bis(aminophenolate) derivative. The syn thesized complexes and the thermolysis product are characterized by EPR, IR, and 1 H, 13 C, and 119 Sn NMR spectroscopy and elemental analysis. The structures of the (tert Bu)ImSQSn(tert Bu) 2 Cl complex and the thermal decomposition product, {(iso Pr)AmPh} 2 Sn ((iso Pr)AmPh is 2 (2,6 di iso propylphenyl)amino 4,6 di tert butylphenolate), are determined by X ray diffraction analysis.