Synthesis, characterization and reactivity studies of some electrophilic mono- and binuclear nitrosyls of ruthenium(II) containing ketoximates

Abstract

The reaction of [RuX₂(HL)(L)] (2) [X=CI or Br; HL (1)=PhC(O)C( = NOH)Ph (HL¹) or PhC(O)C(=NOH)Me (HL²)] with BuONO affords mononuclear [RuX(NO)L<img src='http://www.niscair.res.in/jinfo/equation36.gif' border=0>](<b>3</b>) or binuclear [RuX2(NO)Vh (<b>4</b>) nitrosyls depending on L;' <b>3</b> and <b>4</b> are also obtainable by reacting 2 with NaNO₂ in the presence of hydrochloric acid. Molecular weight determinations are 10 full consonance with mono- and binuclear formulations. Both 3 and 4 are electroactive and reductions characteristic of mono- and binuclear compositions are observable on the negative side of SCE. They react smoothly with acetylacetone (acacH) in presence of K₂CO₃ affording K[Ru(acamo)L<img src='http://www.niscair.res.in/jinfo/equation36.gif' border=0>] (<b>6</b>) and K[Ru(acac)(acamo) L²](<b>7</b>) [acamo is deprotonated CH₃C(= O)C( = NOH)[C(= O)CH₃] respectively.