Dimolybdenum species

H20 in which one malonate dianion forms a bridge between two dimolybdenum species.432... 

The concentrations of the products produced by the reaction between Mo(H20)63+ and N03" are consistent with one mole of dimolybdenum species and two moles of nitrite (Table II). The concentration of... 

Table 22.2 Mo—Mo bond lengths and orders in selected dimolybdenum species.

All available evidence indicates that the reactions with iodine correspond to a one-electron oxidation of the dimolybdenum species as indicated by Equations 2 and 3. Thermal decomposition of the triiodide... 

Figure 3 is the mass spectrum of the mixture containing 80 mole % MoW(0200(0113)3)4 and 20 mole % Mo2(0200(0113)3)4. The parent ion peaks for the M02 species are centered at 596 amu, those for the MoW species at 683 amu. For the dimolybdenum species, the parent ion set is in good agreement with that expected according to Hochberg et ah (19), and the parent ion set for the MoW species agrees with the expected isotope combinations. However, the relative intensities of the two sets are not an accurate reflection of the composition of the mixture. 

Furthermore, chemical oxidation of [Mo(CO)6] with organic molecules containing acidic hydrogen gives rise to molybdenum species in the +2, -i-3 and +A oxidation states. Higher oxidation states (r-5 and -i-6) have been observed when halogens directly oxidize [Mo(CO)6], A Mo tetranuclear complex has been obtained when hydrochloric acid reacts with the tri-p-hydroxy-dimolybdenum complex, as shown in Equation 9.2 ... 

The nature of the molybdenum species within the LMP prepared by Schemes I and II is revealed by electronic and magnetic spectroscopy, which are particularly useful because the spectroscopic behavior of multiply bonded dimolybdenum cores coordinated by phosphate ions is well... 

Unlike the dimolybdenum(II) tetracarboxylates, (especially Mo2(02CCH3)4), which have served as the key starting materials in the development of multiply bonded dimolybdenum chemistry15, the related ditungsten(II) species W2(02CR)4 have not yet found a similar use. This reflects their ease of oxidation, with consequent difficulty of handling. This is especially true for those reactions in which oxidative addition can occur across the... 

Mo(pz)3BH one of the HB(pz)3 ligands is bidentate the other is tridentate with a weakly bonded axial pz group, in line with the known resistance of dimolybdenum(II) to attach to axial ligands 1 Finally, the structure of the rather complicated species 24, which contains both oxy and methoxy bridges, has been determined by X-ray crystallography... 

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