The Carbaboranes, including their Metal Complexes

A few review articles on carbaboranes have appeared during the year, including those on cobalt carbaboranes, structure and property modification of m-carbaborane siloxanes, and further electron counting correlations between boron clusters and metal carbonyl clusters.  

The current year has seen the appearance of comprehensive data on known carbaboranes up to the end of 1976. - Other reviews have discussed Group IV carbaboranes, carbaborane crystal structures, wfo-monocarbaboranes, car-baborane nomenclature, metallocarbaboranes, and triple decker complexes with boron heterocycles as ligands. Theoretical studies have considered molecular orbitals utilized in bonding carbaboranes and their relationship to cage counting rules.  

1 Gmelin Handbook of Inorganic Chemistry, Supplementary Work, Vol. 42 Boron Compounds, Pt 11 Carboranes 3 8th Edition Springer-Verlag 1977, 

HS-group in 9-HS-l,7-CaBioHu to —SCH3, —SMca, —SOMe, —SOaMe, —S—S—, —SO3-, —SO2Q, and —SOgNRa has been reported.  

Plesek, Z. Janousek, and S. Hermanek, Coll. Czech. Chem. Comm., 1978, 43, 2862. 

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Ligands that contain carbon and other heteroatoms Tt-bonded to palladium are few, and are not included in this chapter. However, it is worth mentioning the first palladium complex with Tt-bonded CO2, Pd( j -C02)(PMePh2)2, which was synthesized recently. Palladium complexes with Tt-bonded carbaboranes have also been reported but will not be treated here. Their structures show that the metal is always slipped away from carbon and closer to boron. ... 

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