Se. O'Brien et Pla. Popelier, Quantum molecular similarity. Part 2: The relation between properties in BCP space and bond length, CAN J CHEM, 77(1), 1999, pp. 28-36
Citations number
28
Categorie Soggetti
Chemistry
Journal title
CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE
In previous work we introduced an abstract space of bond critical point pro
perties, called BCP space, to measure the similarity between molecules. In
this contribution we critically examine the dependence of properties in BCP
space on equilibrium bond length, a topic which has been extensively inves
tigated in the literature. For that purpose we have designed a data set of
57 molecules yielding 731 bond critical points. We confirm the existence of
local linear relationships provided the bonds vary little in their chemica
l surroundings. Such relationships break down completely for larger subsets
of bond critical points encompassing a wider variety of bonds. The pattern
s observed in the global picture show so little correlation that one may sa
fely conclude that BCP properties cannot be trivially recovered or even pre
dicted by knowledge of bond length alone.