ABSTRACT
One of the most important and exciting events in the chemistry of the twentieth century was a discovery of polyhedral boron hydrides at the end of 1950s. It was shown that boron atoms in boron hydrides are linked by unusual three-centered two-electron bonds or multicentered bonds. The establishment of three-centered two-electron bonds made a true revolution in the theory of chemical bonding and William Lipscomb was awarded the Nobel Prize in 1976 “for his studies on the structure of boranes illuminating problems of chemical bonding” [1].
