Question

Draw a mechanism that explains how the nitro-substituted aromatic products observed in your reaction were formed. My sample was nitrodiphenylmethane and three peaks were observed using GC/MS. I wasn't sure how to determine what the peaks meant exactly. We had to use SDBS and this gave me p-benzylnitrobenzene when typing in the molecular formula C13H11NO2. Therefore, I assumed I had p-nitrodiphenylmethane as a product, but didn't know how to determine the other product? Any help would be greatly appreciated. I know you can't show the mechanism on here, but any explanation or site you think would help me would be great.