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. 2010 Nov 11;86(9):867–883. doi: 10.2183/pjab.86.867

Table 1.

Relative rates of halogenations of 9-tert-butyl-1,2,3,4-tetrahalotriptycene39)

33 Reagent Relative reactivities
X ±sc ap
Cl SO2Cl2 0.95 ± 0.05 0.60 ± 0.03
Cl Cl2 0.84 ± 0.02 0.83 ± 0.05
Cl Br2 2.78 ± 0.3 0.89 ± 0.04
Cl Br2-NBS 1.16 ± 0.08 0.82 ± 0.04
Br Br2-NBS 4.1 ± 0.8 0.8 ± 0.2