| Abstract: | The electron impact mass spectral fragmentation of five newly synthesized Ni(II) and Pd(II) complexes of diphenylphosphinoacetone (HL), i.e. trans- NiCl2(HL)2] and trans-PdCl2(HL)2] and their enolates cis-NiL2] and cis-PdL2] and the bis-enolate of 3-diphenylphosphinobutan-2-one (HLMe), trans-Ni(LMe)2], is discussed. The proposed fragmentation mechanisms and the ion structures were confirmed by high-resolution data for three of the compounds and by Ni and Pd isotope abundances. The results obtained reveal that a mass spectral differentiation is useful in the identification of these types of complexes. Especially with phosphinoenolate bis-chelates molecular ion peaks are observed. |
