Title of article :
Acidity and photolability of ruthenium salen nitrosyl and aquo complexes in aqueous solutions
Author/Authors :
Bordini، نويسنده , , J. and Novaes، نويسنده , , D.O. and Borissevitch، نويسنده , , I.E. and Owens، نويسنده , , B.T. and Ford، نويسنده , , P.C. and Tfouni، نويسنده , , E.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
The photochemical behavior of nitrosyl complexes Ru(salen)(NO)(OH2)+ and Ru(salen)(NO)Cl (salen = N,N′-ethylenebis-(salicylideneiminato) dianion) in aqueous solution is described. Irradiation with light in the 350–450 nm range resulted in nitric oxide (NO) release from both. For Ru(salen)(NO)Cl secondary photoreactions also resulted in chloride aquation. Thus, in both cases the final photoproduct is the diaquo cation Ru III ( salen ) ( OH2 ) 2 + , for which pKa’s of 5.9 and 9.1 were determined for the coordinated waters. The pKa of the Ru(salen)(NO)(OH2)+ cation was also determined as 4.5 ± 0.1, and the relative acidities of these ruthenium aquo units are discussed in the context of the bonding interactions between Ru(III) and NO.
Keywords :
salen , Schiff base , complexes , nitrosyl , photochemistry , donor , Nitrosonium , Acidity , Coordinated water , Sequential photoreactions , Photolability , chloride , Photorelease , Ruthenium , Nitric oxide
Journal title :
INORGANICA CHIMICA ACTA
Journal title :
INORGANICA CHIMICA ACTA
