Tetradecker complex

Interactions between non-halogen-containing IIIB compounds and transition-metal complexes are found in 6.5.3. Most of these IIIB compounds are boron-containing heterocycles. A series of interesting sandwich compounds, including triple- and tetradecked complexes, are synthesized by methods in 6.5.2.1-6.5.3. 

Dihydro-l,2,5-thiadiboroles (Et2C2B2R2S) have remarkable acceptor properties toward metal-ligand moieties. Dihydrothiadiborole-derived complexes can be achieved thermally or photochemically, e.g., Co and Fe sandwich, triple-decked and even tetradecked complexes are known, all having direct metal-boron bonds. 

As by-products triple- and tetradecked complexes are obtained Tj -CpCo-/i-(Et2C2-B2Me2CH)CoCp-Tj , 7 -CpCo-jU.-(Et2C2B2Me2CH)M-/A-(Et2C2B2Me2CH)-CoCp-Tj (M = Co, Ni). A second route to the hexadecked complex uses Tj -C3H5Ni-/j,-(Et2C2B2Me2CH)CoCp-r) and (Et2C2B2Mc2CH2)2Ni. 

Alkyl-2,3-dihydrodiboroles on treatment with bis(/7 -allyl)- or bis( -methylallyl)nickel give the tetradecker complexes 2 [ML = = Ni( -... 

Bis(allyl)nickel complexes react with alkyl derivatives of 2,3-dihydro-l,3-diborole to give the first n -allyl tetradecker complexes (14) to be isolated. ... 

Diborathiacyclopentadienyl Complexes.—New tetradecker complexes containing the l,3-dimethyl-4,5-diethyl-l,3-dibora-2-thiacyclopentadienyl ligand (L) have been synthesized, viz. [CpFe(L)M(L)FeCp] (M = Fe and Co). ... 

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