title: Interactions of nitric oxide with copper(II) dithiocarbamates in aqueous solution.
abstract: This is the first report on the formation of air-stable copper nitrosyl complexes. The interaction of nitric oxide, NO, with Cu(DTC)(2).3H(2)O (DTC: dithiocarbamate) and was studied in aqueous solution at pH 7.4 and 293 K. The stability constants were determined from UV-Vis data, using LETAGROP program. The high values obtained, log beta(1)=9.743(5) and log beta(2)=15.44(2) for Cu(ProDTC)(2)-NO, (ProDTC=L-prolinedithiocarbamate) and log beta(1)=8.723(5) and log beta(2)=11.45(2) for Cu(MorDTC)(2)-NO system, (MorDTC=morpholyldithiocarbamate), indicate the formation of two stable nitrosyl complexes, Cu(DTC)(2)NO and Cu(DTC)(2)(NO)(2). Coordinated NO is neither affected by the presence of air nor when the solution is purged with Ar. Cu(MorDTC)(2)NO.3H(2)O was isolated in the solid state and its nuNO (IR) band at 1682 cm(-1), but affected by temperature variations over 333 K.
authors.affiliation: Laboratorio de Bioinorgánica, Facultad de Química, Universidad de La Habana, Havana 10400, Cuba.
authors.forename: Alicia
authors.initials: A
authors.lastname: Díaz
authors.forename: Mayreli
authors.initials: M
authors.lastname: Ortiz
authors.forename: Ileana
authors.initials: I
authors.lastname: Sánchez
authors.forename: Roberto
authors.initials: R
authors.lastname: Cao
authors.forename: Alfredo
authors.initials: A
authors.lastname: Mederos
authors.forename: Joaquin
authors.initials: J
authors.lastname: Sanchiz
authors.forename: Felipe
authors.initials: F
authors.lastname: Brito