High resolution ¹H and ¹³C NMR and mass spectral studies of substituted dipyridylpyridazine

Abstract

Total assignment of the ¹H and ¹³C NMR spectra of 3,6-bis(2'-pyridyl)pyridazine derivatives (n-dppn) have been recorded at 400 and 100 MHz, respectively.¹Based on these data, the complete assignment of the ¹³C NMR chemical shift values was made by a ¹³C{¹H} decoupling. The spectra clearly show that the n-dppn ligands exist in the cis–cis conformation at least in solution. Matrix assisted laser desorption ionization (MALDI) and time-of-flight mass spectrometry (TOFMS) are used to record the mass spectra of the n-dppn ligands. α-Cyano-4-hydroxycinnamic acid (CHCA) matrix promoted the molecular ion detection when 180 pmol of n-dppn is introduced into the TOFMS.