Grignard rxn intermediates?

 Hi there, everybody.
 Is anyone aware of any computational work on Grignard
 reaction intermediates?
 Is there any hope of guessing at an intermediate geometry
 and running a calculation with any meaning whatsoever?
 Is there any way to get information about the electronic
 structure of a reaction intermediate?
 Any information, advice, or informed opinion will be welcomed.
 Thanks very much,
 Mary Jo Ondrechen