Multifunctional 3,4-alkylenedioxythiophene derivatives represented by formula (I) are described, ##STR00001## In formula (I), n and m each independently of each other, and independently for each o, are an integer from 1 to 5, and o is 3 or 4. The groups R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently of each other and independently for each o, selected from, for example, hydrogen, halogen and optionally substituted linear or branched C.sub.1-C.sub.20-alkyl. The group R-- of formula (I) may be, independently for each o, hydrogen or a thiophene represented by the following formula (II), ##STR00002## in which m, n, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as described in formula (I). The group X-- of formula (I) is a polyvalent linking unit (e.g., a triphenylamine radical). Also described are electrically conductive oligomers and polymers comprising the multifunctional 3,4-alkylenedioxythiophene derivatives of the present invention as a repeating or crosslinking unit.