Kemija - 2023. jesen, 9.

${\mathrm{C}\mathrm{u}}^{2+}\backslash mathrm\{Cu\}^\{2+\}$

${\mathrm{C}\mathrm{N}}^{-}\backslash mathrm\{CN\}^\{-\}$

${\mathrm{B}\mathrm{F}}_3\backslash mathrm\{BF\}\_\{3\}$

${\mathrm{S}\mathrm{i}\mathrm{F}}_4\backslash mathrm\{SiF\}\_\{4\}$