INVESTIGATION INTO THE REACTIVITY OF THE METAL-METAL TRIPLE BOND IN [CP'(CO)2M]2(CP'=ETA-5-C5ME5 M=MO,W) VS ELEMENTAL SULFUR - FORMATION OF DIFFERENT CP'2M2S4 ISOMERS AND CRYSTAL-STRUCTURES OF CP'2MO2(MU-S2) (MU-S)2 AND CP'2(CO)2W2(MU-S)2S Journal Article