Additional supporting information may be found in the#R##N#online version of this article: http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291096-987X
['Frans T.I. Marx', 'Johan H.L. Jordaan', 'G. Lachmann', 'Hermanus C.M. Vosloo']
A Molecular modeling study of the changes of some steric properties of the precatalysts during the olefin metathesis reaction