Borylated Tris dioxime metal Complexes and Related Compounds

Borylated Tris(dioxime)metal Complexes and Related Compounds 4.1.3.1 

Complexes containing encapsulated metal ions (clathrochelates ) with the formula [M(dioxime)3(BR)2] are known with iron(II) 135, cobalt(ll) 136, cobalt(III) 137, and ruthenium(ll) 138 (Fig. 37) [205-220]. Generally, these macrobicyclic complexes are prepared by template synthesis from a mixture of 

So far, hexasubstituted derivatives 135 have been prepared with aryl and alkyl thiolates, phenolates as well as oxo- and thioether precursors [220]. 

Tris(dioxime) complexes that are capped with a boryl group BR at only one end of the molecule are also known, e.g., with technetium(III) [227, 228] and rhenium(III) [229]. 

Two interesting monoborylated clathrochelates 139 and 140 are known (Fig. 38), in which three oxime functions are joined together by a BR group, while the other half of the ligand is capped by a carbon or a phosphorus atom, respectively. 

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