Answers are grounded in this paper and cite their sources.
The quaternisation of 2‐(methylpyridyl or quinolyl)benz‐X‐azoles mainly leads to the corresponding pyridinium and quinolinium salts, from which polymethine dyes are prepared. The electronic spectra and the methyl protons chemical shifts are briefly discussed.
No takes yet. Share an insight, caveat, or question.
Barni et al. (1978) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: