Journal ArticleDOI
Kinetics of Hydrolysis of cis-Difluoro-bis-(ethylenediamine)-chromium(III) Cation1
TLDR
In this paper, the rates of release of fiuoride by acid and base hydrolysis of cis-STACr(en)/sub 2/F/ sub 2/O)F!/sup 2+/ were determined over a range of pH 1 to 8.Abstract:
The rates of release of fiuoride by acid and base hydrolysis of cis- STACr(en)/sub 2/F/sub 2/!/sup +/ were determined over a range of pH 1 to 8. At 25 deg the pseudo first-order aquation rate constant for loss of the first fiuoride in 0.1 f HClO/sub 4/ is 5.3 x 10/sup -6/ sec/sup -1/, much less than the corresponding rate constants of cis-STACo(en)/sub 2/F/sub 2/!/sup +/ and cis- STACr(en)/sub 2/Cl/sub 2/!/sup +/ in 0.1 f HNO/sub 3/ . The Arrhenius activation energy is 23 plus or minus 1 kcal./mole. The aquation of cis-STACr(en)/sub 2/F/ sub 2/!/sup +/ is acid catalyzed like the cobalt analog but, unlike the dichloro cobalt and chromium analogs, presumably because the difiuoro complexes aquate by a mechanism involving an intermediate reactive protonated complex. Cation- exchange and spectral evidence indicate that the aquation product is largely, if not entirely, cisSTACr(en)/sub 2/(H/sub 2/O)F!/sup 2+/. Fluoride is taken up by one or more reaction products in later stages of the hydrolysis. The aquation appears not to be accelerated by visible light. (auth)read more
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Journal ArticleDOI
Rate parameters for ligand replacemen processes in octahedral complexes of metal in oxidation state three
TL;DR: Ubersicht uber Aquotisierung, Solvolyse, Isomerisierings, Anionenaustausch, ihren experimentellen Methoden und Einflus vom Oxidationszustand und Grose des Metalls as discussed by the authors.
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Separation of Cis-Trans-Cobalt(III) Amine Complexes by Thin Layer Chromatography.
L. F. Druding,R. B. Hagel +1 more
Journal ArticleDOI
Chromatography of coordination complexes
Journal ArticleDOI
Hydrolysis of Alkyl Halides Induced by Metal Ions: M+–SN1 and M+–SN2 Reactions
TL;DR: In this paper, the kinetics, mechanism, and driving forces of alkyl halides and several inorganic halides, induced by metal ions M+ in aqueous media, are summarised.
Journal ArticleDOI
Kinetics and mechanism of aquation reactions of dihalo-, diacetonitrile- and bromoacetonitrile-(3,3′,3″-triaminotripropylamine)cobalt(III) perchlorate
TL;DR: In this paper, the octahedral cobalt(III) complexes with the tripodal quadridentate amine 3,3′,3″-triaminotripropylamine [trpn = N(CH2CH 2CH2NH3)3], [Co(trpn)Cl2]ClO4, [Co-(trpn)(CH3CN)2]3+ 2→ [Co((H2O)]3+2]2]-3+, showed the extreme lability of these complexes.