Twisted [(R(3)P)PdX] groups above dicarbaborane ligands: 4-dimethylsulfido-3-iodo-3-triphenylphosphine-closo-3-pallada-1,2-dicarbadodecaborane and 3-dimethylphenylphosphine-3-chloro-4-dimethylsulfido-closo-3-pallada-1,2-dicarbadodecaborane.

Stabilization of acyclic phosphazides using the ortho-closo-dicarbadodecaboranyl residue.

The reactions of triphenylphosphine with the azido-ortho-closo-dicarbadodecaboranes 1-N(3)-2-R-closo-1,2-C(2)B(10)H(10) [R = Me (1a), Ph (1b)] produce the stable and isolatable carboranyl phosphazides 1-(N(3)PPh(3))-2-R-closo-1,2-C(2)B(10)H(10) [R = Me (2a), Ph (2b)] in good yields. Single crystal X-ray diffraction analysis revealed that, in the solid state, phosphazide 2a adopts an unusual s-c...

An unusual conversion of paramagnetic [3-Cl-3,3,8-{Ph2P(CH2)nPPh-µ-(C6H4-ortho)}-1,2-(CH3)2-closo-3,1,2-RuIIIC2B9H8] (n=3 and 4) to form the first 18-electron P-phenylene ortho-cycloboronated closo-ruthenacarboranes with a dioxygen ligand.

Treatment of [3-Cl-3,3,8-[Ph2P(CH2)nPPh-µ-(C6H4-ortho)]-1,2-Me2-closo-3,1,2-RuIIIC2B9H8] (1, n=3; 2, n=4) with an excess of KOH in a 1:1 benzene/methanol mixture at room temperature in air affords new dioxygen closo-ruthenacarborane complexes [3-(η2-O2)-3,3,8-[Ph2P(CH2)nPPh-µ-(C6H4-ortho)]-1,2-Me2-closo-3,1,2-RuIIIC2B9H8] (3, n=3) and (4, n=4) in 42.5% and 45.8% yield respectively. The structur...

Scanning tunneling microscopy study of intermediates in the dissociative adsorption of closo-1,2-dicarbadodecaborane on Si(111)

Further studies of the Enhanced Structural Carborane Effect: tricarbonylruthenium and related derivatives of benzocarborane, dihydrobenzocarborane and biphenylcarborane.

Detailed comparison of the molecular structures of [1,2-μ-(C4H4)-3,3,3-(CO)3-3,1,2-closo-RuC2B9H9] (1) and [1,2-μ-(C4H6)-3,3,3-(CO)3-3,1,2-closo-RuC2B9H9] (2) reveals evidence for an Enhanced Structural Carborane Effect in 1 arising from the involvement of the cage pπ orbitals in the exopolyhedral ring to some degree. A minor co-product in the synthesis of 2 is [η-{1,2-μ-(C4H6)}-3,3-(CO)2-3,1,2...

Synthesis of stable platinum complexes containing carborane in a carrier group for potential BNCT agents.

A series of stable platinum complexes containing closo-carborane cages in a 'carrier group', which could be potentially utilized for boron neutron capture therapy (BNCT), was successfully synthesized and characterized by various spectroscopic methods. Two ortho-closo-carborane cages were connected to the 3,3' or 4,4'-positions of 2,2'-bipyridine through ester bonds to give three carborane-linke...