SYNTHESIS AND PROPERTIES OF MULTINUCLEAR COBALT(III) COMPLEXES CONTAINING DICARBOLLIDE(2-) AND DICARBACANASTIDE(4-) ANIONS

A series of chain multinuclear cobaltacarboranes of the general formul a [(C2B9H11)(2)Co-n(C2B8H10)(n-1)](n-), where n = 4 to 7, were synthes ized. These compounds, containing derivatives of ortho-carborane (12) as ligands and dicarbollide C2B9H112- and bidentate dicarbacanastide C 2B8H104- ligands, were studied by IR, UV, and H-1 and B-11 NMR spectro scopy. The nonequivalence of the dicarbacanastide ligands that occupy different positions in the chain with respect to the terminal dicarbol lide ligands was discovered.