carbenium

is likely misspelled.

has no English definition.

As a noun carbenium

is any carbocation.

As nouns the difference between carbynium and carbenium

is that carbynium is (chemistry) the radical cation h₂c ⁺ or ony organic derivative of it while carbenium is (organic chemistry|informal) any carbocation.

As nouns the difference between taxonomy and carbenium

is that taxonomy is the science or the technique used to make a classification while carbenium is (organic chemistry|informal) any carbocation.

Stannylium is a related term of carbenium.

As nouns the difference between carbenium and stannylium

is that carbenium is any carbocation while stannylium is any cation formed by a tin atom with three bonds, having the general formula R₃Sn+

Carbenium is a related term of silylium.

As nouns the difference between carbenium and silylium

is that carbenium is (organic chemistry|informal) any carbocation while silylium is (chemistry) any cation formed by a silicon atom with three bonds, having the general formula r₃si⁺.

Carbenium is a related term of germylium.

As nouns the difference between carbenium and germylium

is that carbenium is (organic chemistry|informal) any carbocation while germylium is (chemistry) any cation formed by a germanium atom with three bonds, having the general formula r₃ge⁺.