Reactions and reaction products of bromine and iodine with tetrakis(ethyl xanthato)dimolybdenum(4.degree.Mo-Mo)

Prospects for dinuclear transition metal chemistry illustrated by recent advances in the chemistry of dimolybdenum and ditungsten

“…The reactions between Mo2 ($2COEt2)4 (M-M) and 12 and Br2 yield Mo2X2(S2COEt)4 compounds (X = I or Br) (78). The structure of the oxidative-addition products is shown in Figure 11.…”

Chemical Reactions of Metal‐Metal Bonded Compounds of the Transition Elements

“…of this transformation is seen in the reactions between the xanthate ho 2 (S 2 COEt) 4 and the halogens X 2 (X = Br, I) which yield Mo 2 X 2 (S 2 COEt) 4 compounds. The structural analyses (146) showed that these compounds did not contain (CO) 4 (CO) 4 Os Os (72) -Os Os- 4 . The reaction apparently proceeds via initial loss of CO (166).…”

Preparation and characterization of dimeric and tetrameric clusters of molybdenum and tungsten

“…Structure of the MOgClg^' anion Unfortunately, reactions involving multiply bonded dimers frequently lead to irreversible structural degradation thereby pro ducing stable compounds in which the metal-metal bond is greatly weakened or lost altogether (39)(40)(41)(42)(43)(44)(45)(46)(47)(48)(49)(50). While this is true for both triply bonded and quadruply bonded complexes, dimers with triple metal-metal bonds have been found to participate in several reversible reactions which are catalytically significant.…”