The reactions of heterobimetallic µ-alkylidyne complexes [MFe(µ-CR)(CO) n (η-C 5 H 5 )] (M ) W, Mo; R ) C 6 H 4 Me-4 (R 1 ), C 6 H 3 Me 2 -2,6 (R 2 ); n ) 5, 6) with elemental tellurium are reported. For [WFe(µ-CR 1 )(CO) n (η-C 5 H 5 )] (n ) 5 or 6), the only isolated product is the first example of a complex with a bridging telluroaroyl ligand [WFe(µ-TeCR 1 )(CO) 5 (η-C 5 H 5 )] (5a-Te), which reacts with dppm to provide [WFe(µ-TeCR 1 )(µ-dppm)(CO) 3 (η-C 5 H 5 )] (6-Te).The complexes [MFe(µ-CR 2 )(CO) 5 (η-C 5 H 5 )] (M ) W, Mo) however react with tellurium under ultrasonic activation to provide the telluroaroyl [MoFe(µ-TeCR 2 )(CO) 5 (η-C 5 H 5 )] (5b-Te) or µ-telluride clusters [MFe 2 (µ-CR 2 )(µ 3 -Te)(CO) 7 (η-C 5 H 5 )] (M ) W 7a-Te, M ) Mo 7b-Te). Complex 7a-Te reacts with dppm to provide [MFe 2 (µ-CR 2 )(µ 3 -Te)(CO) 7 (η-C 5 H 5 )] (8b-Te). Crystal structures of 5a-Te, 6a-Te, and 7a-Te are reported.a Numbering used in ref 27 replaced for consistency with that used for 7a.
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