Abstract
This review presents a survey of crystallographically characterized pentacoordinate complexes of transition metals from groups 9 (monovalent) and 10 (divalent). Extensive structural analyses of compounds featuring monodentate and terdentate (pincer) ligands have allowed us to identify preferences and trends in the geometries of the metal center and the various ligand coordination sites. Comparisons of the reported complexes to Hoffman and Rossi’s predictions outlined in 1975 regarding the preference for trigonal bipyramidal coordination geometries and the specific coordination site preferences of various ligands have led to useful generalizations regarding the important factors that govern metal–ligand bonding and overall coordination geometries, including chelation and specific character of terdentate ligands, steric demand and trans directing ability of ligands, and the presence of Z-type ligands. A series of DFT studies have also been conducted to test our generalizations on model complexes.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
