Bridged rhomboid

Figure 1 Synthesis of triangle 4, rhomboid 5, and bridged rhomboid 6 from combinations of directional ligands 1, 2, and 3. Adapted with permission from Ref 12CC9873. Copyright 2012 Royal Society of Chemistry.

Crystallographic examination of 22 revealed the existence of infinite ID ribbons (Fig. 39). These corrugated ribbons are constituted by two bridging dithioether ligands, with span rhomboid Cu2l2 units. Each copper center of... 

Djordjevic, C., M. Lee-Renslo, and E. Sinn. 1995. Peroxo malato vanadatcs(V) Synthesis, spectra and structure of the (NH4)2[V0(02)(C4H405)]22H20 dimer with a rhomboidal V202(hydroxyl) bridging core. Inorg. Chim. Acta 233 97-102. 

A jix-carboxylato-bridged complex [Mn 4(jU.-phthalate)2(bipy)8] can be described as rhomboid in shape with edge Mn---Mn distances of 5.16 A and a short diagonal of 7.337 A. Interestingly, it showed weak net ferromagnetic coupling, but no analysis was given (109). 

The structures of the reduced oxomolybdates having cluster chains summarized in Ikble 5-6 have different patterns of interconnection between the chains. Whereas in 1, 2, 3, 5, and 6 the chains are parallel, in 4 they form layers which are stacked crosswise. In addition, 5 and 6 contain chains of single Mo atoms and ribbons of edge sharing M4 rhomboids. Such ribbons are the only structural element in NaMo204. The bridging O atoms in these oxomolybdates are coordinated by up to four Mo atoms. Oxygen atoms coordinated in three- or fourfold planar as well as SF4 like fashion are quite common. 

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