CCL: Molecular Formula to Structures - Free ware



Dear Colleagues,

I am looking for a program (free ware/or with full trial version for limited time) that can list the possible structures
(organometallic compound) when the molecular formula is given.

For example i know for organic molecules MOLGEN does this job.
But that's not free as well. (molgen(dot)de)

If you have any kind of codes/genetic algorithm that can do this 
job, please share your knowledge and your help will be acknowledged 
suitably.

Best regards,
Dr. Sanjay

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Regards,
Dr. Sanjay Bharathwaj Kumar,
Dharmendra Institute of Technology,
India.