Five-coordinate alkene complexes of palladium(II) and platinum(II)

The review is focused on five-coordinate Pd(II)- and Pt(II)-alkene complexes with a trigonal bipyramidal arrangement of the ligands. Synthetic methods are extensively described and the characterization procedures of 243 compounds are listed. Stereochemical and reactivity aspects are reported. A chart with the X-ray structural parameters of 19 complexes and a list of 76 references are included.