Vanadium, hexacarbonyl structure

The mononuclear metal carbonyls contain only one metal atom, and they have comparatively simple structures. For example, nickel tetracarbonyl is tetrahedral. The pentacarbonyls of iron, ruthenium, and osmium are trigonal bipyramidal, whereas the hexacarbonyls of vanadium, chromium, molybdenum, and tungsten are octahedral. These structures are shown in Figure 21.1. 

The mixture of TCNE and hexacarbonyl vanadium(O) in an organic solvent yields an organic-based magnet with the highest critical temperature to date - ca. 400 K (Eq. 9). However, the detailed solid-state structure of this compound has not been determined due to its air/water reactivity, amorphous morphology, and solvent insolubility. The entrapped solvent is at least partially responsible for its air sensitivity and magnetic susceptibility. That is, CVD of V[TCNE] in the absence of... 

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