Mass spectrometric decompositions of copper complexes with esters and amides of nicotinic acid

Abstract

Mass spectrometric decompositions of complexes of nicotinic acid esters and amides with copper are discussed. Liquid secondary ion mass spectrometry (LSIMS) was used as an ionisation technique and metastable ion spectra were recorded by using B/E linked scans. The fragmentation pathways consist mainly of the loss of one ligand molecule and also the cleavage of amide or ester bonds. It may be possible, on the basis of cleaved neutral fragments, to determine the site of coordination in the gas phase. It was also found that the presence of a chlorine atom affects the fragmentation pathways of complexes.

Quantifying the Effect of Surface Ligands on Dendron–DNA Interactions: Insights into Multivalency through a Combined Experimental and Theoretical Approach

“…Detailed insight into the structure and binding interactions of transition metal complexes can be obtained by collision‐induced dissociation (CID) 20–29. There is particular interest in the formation and dissociation of transition metal complexes with two or more different ligands which are simultaneously bound to one metal ion; in this connection the disassembly of these complexes is dependent on the binding interactions of the various ligands 30–32…”

Influence of Solvent and Counter Ion on Copper Complexes with N-Alkyl-Pyridine-2-Carboxamides as Studied by Electrospray Ionization Mass Spectrometry

“…Although copper complexes with N-alkyl-pyridine-3carboxamides are known to form 22 under the condition used, these ligands did not form abundant ions corresponding to the copper complexes. It confirms that, for ligands 1-3, we deal with real complexes where the copper cation is coordinated by both pyridine and amide nitrogen atoms, not with structurally undefined electrostatic adducts which are often formed under ESI condition.…”