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The limit rate has been observed when NaO<jats:italic>i<\/jats:italic>Pr is used in high excess (<jats:bold>A<\/jats:bold>\/base molar ratio &gt; 10). The amino\u2010isopropoxide species [Ru(O<jats:italic>i<\/jats:italic>Pr)(CNN)(dppb)] (<jats:bold>B<\/jats:bold>), which forms by reaction of <jats:bold>A<\/jats:bold> with sodium isopropoxide via displacement of the chloride, is catalytically active. The rate of conversion of acetophenone obeys second\u2010order kinetics v=<jats:italic>k<\/jats:italic>[<jats:bold>S<\/jats:bold>][<jats:bold>B<\/jats:bold>] with the rate constants in the range 218\u00b18 (40\u2009\u00b0C) to 3000\u00b170\u2005<jats:sc>M<\/jats:sc><jats:sup>\u22121<\/jats:sup>\u2009s<jats:sup>\u22121<\/jats:sup> (80\u2009\u00b0C). The activation parameters, evaluated from the Eyring equation are \u0394<jats:italic>H<\/jats:italic><jats:sup>\u2260<\/jats:sup>=14.0\u00b10.2\u2005kcal\u2009mol<jats:sup>\u22121<\/jats:sup> and \u0394<jats:italic>S<\/jats:italic><jats:sup>\u2260<\/jats:sup>=\u22123.2 \u00b10.5\u2005eu. In a pre\u2010equilibrium reaction with 2\u2010propanol complex <jats:bold>B<\/jats:bold> gives the cationic species [Ru(CNN)(dppb)(HO<jats:italic>i<\/jats:italic>Pr)]<jats:sup>+<\/jats:sup>[O<jats:italic>i<\/jats:italic>Pr]<jats:sup>\u2212<\/jats:sup> (<jats:bold>C<\/jats:bold>) with <jats:italic>K<\/jats:italic> \u22482\u00d710<jats:sup>\u22125<\/jats:sup>\u2009<jats:sc>M<\/jats:sc>. The hydride species [RuH(CNN)(dppb)] (<jats:bold>H<\/jats:bold>), which forms from <jats:bold>B<\/jats:bold> via \u03b2\u2010hydrogen elimination process, catalyzes the reduction of <jats:bold>S<\/jats:bold> and, importantly, its activity increases by addition of base. The catalytic behavior of the hydride <jats:bold>H<\/jats:bold> has been compared to that of the system <jats:bold>A<\/jats:bold>\/NaO<jats:italic>i<\/jats:italic>Pr (1:1 molar ratio) and indicates that the two systems are equivalent.<\/jats:p>","DOI":"10.1002\/chem.200700507","type":"journal-article","created":{"date-parts":[[2007,6,20]],"date-time":"2007-06-20T05:16:55Z","timestamp":1182316615000},"page":"7479-7486","source":"Crossref","is-referenced-by-count":97,"title":["Catalytic Transfer Hydrogenation with Terdentate CNN Ruthenium Complexes: The Influence of the 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