Determination of stability constants for thallium(III) cyanide complexes in aqueous solution by means of sup 13 C and sup 205 Ti NMR

Journal Article · Mon Nov 27 04:00:00 EST 1989 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00202a019· OSTI ID:6717017

Blixt, J; Gyori, B; Glaser, J ^[1]

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1. Royal Institute of Technology, Stockholm (Sweden)

In contrast to what is usually assumed, we have found and proved that thallium(III) forms very strong cyanide complexes in aqueous solution. The authors have investigated this system using {sup 205}Tl, {sup 13}C, and {sup 14}N NMR and potentiometry and established the existence of four thallium(III)-cyanide complexes of the composition Tl(CN){sub n}{sup 3-n}, n = 1-4. We have measured their chemical shifts and spin-spin coupling constants and determined their formation constants at 25{degree}C in dilute (0.05 M) aqueous solution in the ionic medium ((Na{sup +}) = 1 M, (Li{sup +}) + (H{sup +}) = 3 M, (ClO{sub 4}{sup {minus}}) = 4 M). We have also determined the stability constant for HCN in the same ionic medium, log K{sub a} = 10.11 (5).

• OSTI ID: 6717017
• Journal Information: Journal of the American Chemical Society; (USA), Journal Name: Journal of the American Chemical Society; (USA) Vol. 111:20; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AQUEOUS SOLUTIONS
CALCULATION METHODS
COMPLEXES
CYANIDES
DATA
DATA ANALYSIS
DISPERSIONS
EXPERIMENTAL DATA
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
MIXTURES
NMR SPECTRA
NUMERICAL DATA
POTENTIOMETRY
SOLUTIONS
SPECTRA
STABILITY
THALLIUM COMPLEXES
TITRATION