Kemija - 2025./26. jesen - 20.

${\mathrm{B}\mathrm{F}}_3\backslash mathrm\{BF\}\_\{3\}$ i ${\mathrm{N}\mathrm{H}}_3\backslash mathrm\{NH\}\_\{3\}$

${\mathrm{P}\mathrm{C}\mathrm{l}}_3\backslash mathrm\{PCl\}\_\{3\}$ i ${\mathrm{S}\mathrm{O}}_2\backslash mathrm\{SO\}\_\{2\}$

${\mathrm{O}\mathrm{C}\mathrm{l}}_2\backslash mathrm\{OCl\}\_\{2\}$ i HCN

${\mathrm{B}\mathrm{e}\mathrm{C}\mathrm{l}}_2\backslash mathrm\{BeCl\}\_\{2\}$ i ${\mathrm{C}\mathrm{O}}_2\backslash mathrm\{CO\}\_\{2\}$