Fused octahedra

Figure 1 Prototypal structures for small oligomeric metal alkoxides (a) the cubane-M404 unit in [TKOMe) , and [Na(OBu )]4 (b) die planar [CufOBu1) , structure (c) and (d) fused trigonal and fused trigonal-tetrahedral units as seen in [Be(OR)2) compounds, where n = 3 and 2 (e) fused tetrahedral-octahedral units seen in [Al(OPri)3]4 (f) edge-shared tetrahedra as in [Al(OBu )3]2 (g) fused octahedra as in [MfOEt), , where M = Ti, V, W and (h) edge-shared octahedra as...

Exercise 2.8. The structure of GaioR6 is shown below. Consider the cluster as made up of edge-fused octahedra and compare the observed eve with the calculated one. Now apply the mno rule to this fused cluster system and calculate the number of cluster electrons required from each of the bare Ga atoms in order to satisfy the rule. 

Another type of extended array is also built up of octahedra, but with the sharing of opposite faces. Compounds in this class range from those containing only two or three fused octahedra to infinite chain compounds (Fig. 16-24), which have deceptively simple formulas such as MzMoeXg (X = S, Se, Te M = In, Tl, Na, K). 

The known structural chemistry of anhydrous borates through 1985 has been summarized, and those borate minerals containing fused octahedra and triangles have been classified according to selected fundamental building blocks. 

Metal Carbonyl Clusters Consisting of Fused Octahedra... 

Scheme 1. Pictorial representation of the reaction of boehmite with carboxylic acids. The rectangles represent a side view of the aluminum-oxygen fused octahedra shown in Figure S, while the carboxylate groups are represented by a semicircle and bar.

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