Frank WEINHOLD* and
Clark R. LANDIS
University of Wisconsin, Theoretical Chemistry Institute and Department of Chemistry, USA
We provide a brief overview of “natural” localized bonding concepts, as implemented in the current natural bond orbital program (NBO 5.0), and describe recent extensions of these concepts to transition metal bonding. [Chem. Educ. Res. Pract. Eur.: 2001, 2, 91-104]