Words to Describe halogenation

How halogenation often is described ("________ halogenation")

• nuclear
• molecular
• catalytic
• simultaneous
• chain
• photochemical
• temperature
• oxidative
• electrophilic
• enzymatic
• biological
• anodic
• further
• catalyzed
• free
• direct
• catalysed
• aromatic
• successive
• selective
• complete
• radical