Abstract
Summary The kinetics and mechanism of reversible complexation of Ni 11 with (2-imidazoleazo)benzene (lAB), 2,2'-biimidazole (Biim) and 2,2'-bibenzimidazole (Bibzm) have been investigated at 15-35 ~ I = 0.30 mol din- 3. The stability constants, KM, of the [NIL] z+ species vary in the sequence: [Ni(IAB)] z + [Ni(Biim)]2 + > [Ni(Bibzm)]Z +. The aquation of [Ni(IAB)] z+ is insensitive to acid catalysis, whilst [Ni(Biim)] z+ is relatively more susceptible towards acid-catalysed aquation than [Ni(Bibzm)] 2 +. The chelate ring in [NiL] z+ (L =IAB, Biim or Bibzm) is sterically strained. The formation of [Ni(IAB)] 2+ and [Ni(Bibzm)] z+ may be chelation controlled while the normal I d mechanism is supported by our data for [Ni(Biim)] 2+ .
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
