Nitric oxide reacts with bis(pentane-2,4-dionato)palladium giving a mixture of 3-hydroxyiminopentane-2,4-dionato(pentane-2,4-dionato)palladium and bis-(3-hydroxyiminopentane-2,4-dionato)palladium. More convenient routes to both these compounds are discussed. An analogue of the latter compound derived from ethyl 2-hydroxyimino-3-oxobutyrate is described. The chemistry and spectra of these complexes are discussed in relation to their structures.