Dear Sir,

The azo compounds (organic molecule) minimization using Chimera software giving linear form (R-N=N-R  to R-N=N-R (180 degrees bong angle between  R-N=N instead  R-N=N- 120 degrees). Which is not true. I have used the gasteiger and  amber ff12sb force field. Please suggest me to solve this problem.

Thanking you.

Satheesh.