Kemija - 2020. ljeto, 1.

${\mathrm{C}\mathrm{C}\mathrm{l}}_3\mathrm{F}\backslash mathrm\{CCl\}\_\{3\}\; \backslash mathrm\{F\}$

${\mathrm{C}\mathrm{C}\mathrm{l}}_2{\mathrm{F}}_2\backslash mathrm\{CCl\}\_\{2\}\; \backslash mathrm\{F\}\_\{2\}$

${\mathrm{C}}_2{\mathrm{C}\mathrm{l}}_3{\mathrm{F}}_3\backslash mathrm\{C\}\_\{2\}\; \backslash mathrm\{Cl\}\_\{3\}\; \backslash mathrm\{F\}\_\{3\}$

${\mathrm{C}}_2{\mathrm{C}\mathrm{l}}_4{\mathrm{F}}_4\backslash mathrm\{C\}\_\{2\}\; \backslash mathrm\{Cl\}\_\{4\}\; \backslash mathrm\{F\}\_\{4\}$