The CH3 of toluene is attached to carbon 1 by default. Your name (1-bromo-2-nitro-toluene) did not specify where the CH3 for the toluene group was. The compound name should be 4-bromo-3-nitrotoluene.
The CH3 of toluene is attached to carbon 1 by default. Your name (1-bromo-2-nitro-toluene) did not specify where the CH3 for the toluene group was. The compound name should be 4-bromo-3-nitrotoluene.