Chemistry of substituted sulphuric acids: Part XX - Transition metal <i>p</i>-tolylsulphates and their complexes

Abstract

Cr(III) Mn(II), Fe(II), Co(II), Ni(II) and Cu(II) <i>p</i>-tolylsulhates have been prepared and characterized. Electronic spectral studies of the complexes indicate them to have M[O₆] chromophores via bridging <i>p</i>-tolylsulphato groups, ligand field parameters have been evaluated. The position of the <i>p</i>-tolylsulphate group in spectrochemical series is the order: SO₃F^- < SO<img src='http://www.niscair.res.in/jinfo/four1.gif' border=0> < CH₃SO<img src='/image/spc_char/3_bar.gif' border=0> < p-CH₃C₆H₄SO<img src='/image/spc_char/3_bar.gif' border=0> < H₂O. These metal <i>p</i>-tolylsulphates form donor-acceptor complexes with nitrogen donors such as pyridine, 2,2'-bipyridyl, quinoline and dimethyl-formamide. Electronic spectral and magnetic moment studies have been extended to these systems.