The Bond Path in Action

Let us pause here and briefly mention a few successes the bond path enjoyed over the last decade and a half. The following collection of examples is by no means exhaustive but simply serves to create a context for the repulsive interaction controversy , which 1 will unfold below. 

The description of bonding in boranes [54,71] turned out to be a straightforward application of QCT. This, in spite of boranes being notorious for their difficult rationalisation in terms of the two-centre electron-pair bond model, an issue that has attracted much discussion [72-74]. 

45 for B - 1.78 for N 0.50 for C 0.43 for a H bonded to N and 0.05 for a H bonded to C (the total sum yields a spurious excess charge of - 0.04e, marking the integration error). An electropositive element such as Li is now seen to give away only about O.le in the presence of boron atoms, instead of the usual 0.9e in the presence of heavier elements. 

The boundaries of topological bond analysis were pushed further in an article [86] on van der Waals dimers and trimers, none of which contain a hy- 

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