AZADINIUM SALTS .25. SYMMETRICAL AZOPYRIDINONE DYES - SYNTHESIS, SPECTROPHOTOMETRIC AND ACIDOBASIC PROPERTIES, METAL-COMPLEX FORMATION AND KINETIC INVESTIGATION OF THE AZO-DYE FORMATION

The 13 substituted symmetrical azopyridinone dyes 2a-n were synthesized and their VIS spectra measured. The pK(a)* values of some dyes and of pyridinone coupling components were determined in MeOH/H2O 64:36. The metal-complex formation of the dyes with Cd2+, Zn2+, Co2+, Ni2+, and Cu2+ was investigat...

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Published inHelvetica chimica acta Vol. 77; no. 1; pp. 216 - 230
Main Authors BALLI, H, CHAQUIME, L, HELLRUNG, B, MISUN, M
Format Journal Article
LanguageGerman
Published BASEL NEW SWISS CHEMICAL SOC 01.01.1994
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Abstract The 13 substituted symmetrical azopyridinone dyes 2a-n were synthesized and their VIS spectra measured. The pK(a)* values of some dyes and of pyridinone coupling components were determined in MeOH/H2O 64:36. The metal-complex formation of the dyes with Cd2+, Zn2+, Co2+, Ni2+, and Cu2+ was investigated, and complex-formation constants of the 1:1 complexes were determined in H2O for 2k (Table 2) and in dimethylformamide/H2O 1:1 for some other azopyridinone dyes (Table 3). The mechanism of the ate-dye formation was investigated and found to be much more complicated than expected. A mechanism of the coupling reaction was developed (see Scheme 4) and fitted by least-squares calculations.
AbstractList The 13 substituted symmetrical azopyridinone dyes 2a-n were synthesized and their VIS spectra measured. The pK(a)* values of some dyes and of pyridinone coupling components were determined in MeOH/H2O 64:36. The metal-complex formation of the dyes with Cd2+, Zn2+, Co2+, Ni2+, and Cu2+ was investigated, and complex-formation constants of the 1:1 complexes were determined in H2O for 2k (Table 2) and in dimethylformamide/H2O 1:1 for some other azopyridinone dyes (Table 3). The mechanism of the ate-dye formation was investigated and found to be much more complicated than expected. A mechanism of the coupling reaction was developed (see Scheme 4) and fitted by least-squares calculations.
Author CHAQUIME, L
BALLI, H
HELLRUNG, B
MISUN, M
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1-PHENYLAZO-2-NAPHTHYLAMINE
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NAEF R (WOS:A1994MW15900022.25) 1991
Job, P (WOS:000201809500003) 1928; 9
PERRIN DD (WOS:A1994MW15900022.27) 1974
LETELLIE.P (WOS:A1970H867500002) 1970; 271
BALLI H (WOS:A1994MW15900022.5) 1990; 73
GELSEMA, WJ (WOS:A19668183000002) 1966; 85
SCHWANDER, HR (WOS:A1982NP67800003) 1982; 3
CHAQUIME L (WOS:A1994MW15900022.8) 1992
GUARESCHI I (WOS:A1994MW15900022.11) 1896; 29
KELEMEN, J (WOS:A1982NC15600003) 1982; 3
HELLRUNG B (WOS:A1994MW15900022.13)
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BALLI, H (WOS:A19614457A00002) 1961; 647
SNAYELY FA (WOS:A1994MW15900022.35) 1957; 73
MISUN M (WOS:A1994MW15900022.24) 1988
HELLRUNG B (WOS:A1994MW15900022.12) 1969
KELEMEN, J (WOS:A1982PH50700001) 1982; 3
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Snippet The 13 substituted symmetrical azopyridinone dyes 2a-n were synthesized and their VIS spectra measured. The pK(a)* values of some dyes and of pyridinone...
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SubjectTerms Chemistry
Chemistry, Multidisciplinary
Physical Sciences
Science & Technology
Title AZADINIUM SALTS .25. SYMMETRICAL AZOPYRIDINONE DYES - SYNTHESIS, SPECTROPHOTOMETRIC AND ACIDOBASIC PROPERTIES, METAL-COMPLEX FORMATION AND KINETIC INVESTIGATION OF THE AZO-DYE FORMATION
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