Back رابطة عكسية Arabic Rückbindung German Retrodonación π Spanish Rétrocoordination π French Pengikatan balik π ID Retrodonazione π Italian 逆供与 Japanese 파이 역결합 Korean Pi-backbonding Dutch Pi retrodonacija Serbo-Croatian
In chemistry, π backbonding is a π-bonding interaction between a filled (or half filled) orbital of a transition metal atom and a vacant orbital on an adjacent ion or molecule.[1][2] In this type of interaction, electrons from the metal are used to bond to the ligand, which dissipates excess negative charge and stabilizes the metal. It is common in transition metals with low oxidation states that have ligands such as carbon monoxide, olefins, or phosphines. The ligands involved in π backbonding can be broken into three groups: carbonyls and nitrogen analogs, alkenes and alkynes, and phosphines. Compounds where π backbonding is prominent include Ni(CO)4, Zeise's salt, and molybdenym and iron dinitrogen complexes.
- ^ Miessler, Gary L.; Tarr, Donald A. (1999). Inorganic chemistry (2nd ed.). Upper Saddle River, N.J: Prentice Hall. p. 338. ISBN 978-0-13-841891-5.
- ^ Cotton, Frank Albert; Wilkinson, Geoffrey; Murillo, Carlos A., eds. (1999). Advanced inorganic chemistry (6th ed.). New York: Wiley. ISBN 978-0-471-19957-1.