Cobalt complexes cage compounds

For cobalt(III) compounds, P. Comba calculated five of the six conformations possible for sarcophaginate complexes (Fig. 3), using strain energy minimization [230]. The sixth Dsleh conformation does not exist in cobalt(III) cages. Some structural parameters of the strain energy-minimized structures of the cobalt (III) complex conformers are presented in Table 4. 

The mononuclear cobalt complexes also undergo a capping reaction with an additional HBF4 molecule forming a cage-like compound [437],... 

The high chemical stability of the cobalt cages allows the Co(III)/Co(II) redox states to be cycled repeatedly without decomposition. Besides, these compounds are soluble in water. Thus, Co(III) complexes with N3S3 donors can... 

The gallium and indium atoms maintain their typical tricoordination and do not interact with carbon monoxide which interacts only with the transition metal atoms (manganese). Such a behaviour means that non-transition and transition metal atoms maintain their own properties even when directly bound also in a complex cluster cage. In agreement with this point in a compound as Sn[Co(CO)4] 2 [Mn(CO)s] 2 [137] the cobalt and manganese atoms maintain their typical coordination as the tin atom. 

Caged Amine complexes of Co(III) The reduced form of Co(III) complexes such as Co(III)(NH3)5X2+ are substitutionally labile. A number of caged cobalt(II) compounds have been found to be fairly inert to substitution. The sar, sep or the sulfur-containing capten cage complexes have [Co(III)/Co(II)] potentials > -0.2V vs NHE are and efficient quenchers of Ru(bpy)3 [41-43]. Some of them have been found use as relays for water photoreduction. 

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