semiempirical calculations on a complex of Co and Sn.

 Hi,
 I am interested to run semiempirical calculations on a Cobalt complex
 that undergoes a reaction with  HSnPh3. The transition state and the
 product therefore incorporates both Co and Sn atoms . The problem is that
 I am unaware of a program that is parametrized for both Co and Sn.
 PM3 is parametrized for Sn and ZINDO1 is parametrized for Co ...
 My computational facilities are limited but if you can suggest basis set
 that will not be costly I can try that too.
 I wellcome all suggestions on the subject.
 Thanks
 Tereza Varnali
 Varnali -8 at 8- ds5500.cc.boun.edu.tr