Stereospecific isomerization of some cobalt(III) complexes with flexible tetramine ligands

Brubaker, George R.; Schaefer, David P.

doi:10.1021/ic50092a038

Cited by 10 publications

(3 citation statements)

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“…PdCl2Br22" + Cl" = 3 PdCl3Br2" + Br" a Ionic strength maintained at 1.5 with tetrabutylammonium halide in acetonitrile. 6 Error estimate based on error in log +(3" (Table III). ujog "t-\0^ ß -(see ref 3, eq 26).…”

Section: Table I Comparison Of the Stepwise Constants0mentioning

confidence: 99%

“…A number of interesting correlations have been delineated. 5,6 The relative stabilities of the simple tetracoordinate complexes were obtained and it was found that iodide is -108 2 times more stable than bromide which is -104'1 times more stable than chloride. 6 As in a number of other systems,7 it was observed in the case of palladium that the greater the difference in the stability of the parent complexes the more stable are the mixed complexes.…”

Section: Introductionmentioning

confidence: 99%

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Mixed-ligand complexes of palladium(II) with bromide and chloride in acetonitrile

Klotz¹,

Feldberg²,

Newman³

1973

Inorg. Chem.

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A computer and a graphical method are used to evaluate equilibrium constants and extinction coefficients from spectrophotometric data for the system . tPn PdBr42" + nCP = PdClnBr4_n2" + nBr"The measurements were performed in acetonitrile at an ionic strength maintained at 1.5 with tetrabutylammonium halide. The results obtained by both techniques are in reasonably good agreement. The computer-determined values for the constants are log ß = 1.24 ± 0.07, log 7ß2 = 1.84 ± 0.06, log ß3 = 2.50 ± 0.06, and log +04 = 2.39 ± 0.05. These constants yield a distribution of mixed-halide species which approximates that which would be predicted on a statistical basis. The stability of PdCl42~i s 102•4 times greater than that of PdBr42~i n acetonitrile. This is not only an inversion of the relative stability in water but a change of 6.5 orders of magnitude. The measurement of mixed-ligand complexation appears to be a better method of determining the relative stability of simple ligand complexes than measurements involving the individual systems.

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Section: Table I Comparison Of the Stepwise Constants0mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mixed-ligand complexes of palladium(II) with bromide and chloride in acetonitrile

Klotz¹,

Feldberg²,

Newman³

1973

Inorg. Chem.

View full text Add to dashboard Cite

show abstract

“…The cis-sl [Co(2,3,2 tet)Cl,]' could only be prepared by the decomposition of the correspoi~ding carbonate complex (3). The cis-p isomer in the 2,3,2 tet case occurred only when a bidentate ligand occupied the remaining two positions (4,6). Similarly, only cis-a [Co(3?2,3 tet)ox]+ has been prepared (4).…”

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confidence: 99%