[RuCl2(p-cymene)](2) has been immobilized on silica and mesoporous MCM-41 a
nd used as a catalyst for the atom transfer radical polymerisation (ATRP) o
f styrene, (methyl)mcthacrylate and acrylonitrile. The heterogeneous cataly
st has a comparable activity as the homogeneous analogues and showed no sig
nificant loss of catalytic activity when reused.