The kinetics of ring closure and hydrolysis of a number of halo-cobalt(III) complexes of diaminopolycarboxylate ligands

Evans, M.; Grossman, Bernard; Wilkins, Riley

doi:10.1016/s0020-1693(00)85723-0

Cited by 11 publications

(3 citation statements)

References 30 publications

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“…The five-coordinate complexes [Rh(dppm)2CO]BF4 and [Rh(dppp)2CO]BF4 have been synthesized by reaction of CO (13) The intensity data were processed as described in: "CAD4 and SDP Users Manual"; Enraf-Nonius; Delft, Holland, 1978. The net intensity /is given as / = (K/NPI)(C-25), where K = 20.1166 x (attenuator factor), NPI = ratio of fastest possible scan rate to scan rate for the measurement, C = total count, and 5 = total background count.…”

Section: Resultsmentioning

confidence: 99%

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Chemical and x-ray structural properties of bis[bis(diphenylphosphino)methane]carbonylrhodium(I) tetrafluoroborate

Pignolet¹,

Doughty²,

Nowicki³

et al. 1980

Inorg. Chem.

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Section: Resultsmentioning

confidence: 99%

“…The error in an observation of unit weight was 1.35 with a value of 0.05 for p in the ( ) equation. 13 The final difference Fourier map did not reveal any chemically significant features other than some hydrogen positions which were not included in any calculations.…”

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confidence: 99%

Chemical and x-ray structural properties of bis[bis(diphenylphosphino)methane]carbonylrhodium(I) tetrafluoroborate

Pignolet¹,

Doughty²,

Nowicki³

et al. 1980

Inorg. Chem.

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“…However, disregarding a single example of trans-eq. geometry [15] with a ligand having a substituted ethylenediamine backbone, and the existence of some cis-polar bromocomplexes [16], all known species are thought to be cis-eq. 13C-NMR.…”

Section: Fig 4 Geometrical Isomers Of [Co(enja)x] Complexesmentioning

confidence: 99%

Base Catalysed Racemization of Ethylenediamine‐N,N,N′‐triacetato‐aqua‐cobalt(III)

Bernhard

Bernauer

1977

Helvetica Chimica Acta

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SummaryThe kinetics of the base catalysed racemization of [Co(EN3A)H20I1) were studied polarimetrically in aqueous buffer solution. The reaction rate is first order in OHand in complex, in weakly acidic medium. Activation parameters are AH* = 22 kcal * mol-l, AS' =26 cal K-l. The results are discussed in terms of an S N~C B mechanism involving exchange of the ligand water molecule.The N-methylated analogue [Co(ME3A)HzO] does not racemize in the pH-range investigated. Loss of optical activity occurs at a rate which is about 1,000 times slower than the racemization of [Co(EN3A)HzO] (60") and coincides with the decomposition of the complex. [7-91, involving a trigonal bipyramidal transition state. The stabilization of a corresponding intermediate by n-bonding with the amido nitrogen has been discussed in detail [lo].We now report the results of racemization studies of aquacobalt(II1) complexes with two quinquedentate ligands of the diaminotricarboxylate type.

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σ‐Pyridine Coordination Compounds with Transition Metals

1985

Chemistry of Heterocyclic Compounds: A Series of Monographs

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The kinetics of ring closure and hydrolysis of a number of halo-cobalt(III) complexes of diaminopolycarboxylate ligands

Cited by 11 publications

References 30 publications

Chemical and x-ray structural properties of bis[bis(diphenylphosphino)methane]carbonylrhodium(I) tetrafluoroborate

Chemical and x-ray structural properties of bis[bis(diphenylphosphino)methane]carbonylrhodium(I) tetrafluoroborate

Base Catalysed Racemization of Ethylenediamine‐N,N,N′‐triacetato‐aqua‐cobalt(III)

σ‐Pyridine Coordination Compounds with Transition Metals

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