Characterisation of cationic co-ordination complexes using field desorption mass spectrometry
- 1 January 1981
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 9,p. 1994-1996
- https://doi.org/10.1039/dt9810001994
Abstract
Field desorption (f.d.) mass spectrometry has been shown to provide a useful method for the characterisation of involatile monocationic co-ordination complexes. With square-planar compounds of the type [Pd(dien)X]X [X = Cl or Br; dien = iminobis (ethyleneamine)], [Pd(Et4dien)X]X [X = l or NCS; Et4dien = iminobis(ethylenediethylamine)], and a variety of octahedral complexes of the type cis-[Co(en)2X2]Y (X = NO2, Y = l; or X = NCS, Y = NO3; en = 1,2-diaminoethane), [Co(en)2(sal)][NO3](sal = salicylate), and cis-[Ru(en)2Cl2]Cl the base peak corresponds to the molecular ion [M]˙+ for the cation and no fragmentation is observed. However, for the related complexes trans-[Co(en)2X2]X (X = Cl or Br) and trans-[Co{(–)pn}2Cl2]Cl (pn = 1,2-diaminopropane) no [M]˙+ peaks are observed, and fragment ions associated with ligand loss are seen. Useful f.d. mass spectra can also be obtained with some di- and tri-cationic co-ordination complexes, but the results are less reproducible and sometimes difficult to rationalise.Keywords
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