83290-92-0

Upstream product

• 16070-58-9 tris(triphenylphosphine)chloroiridium 
• 12430-26-1 B₉H₁₂^(1-) 
• 82106-45-4 nido-6-iridadecaborane 
• 603-35-0 triphenylphosphine 

Relevant academic research and scientific papers

Polyhedral iridaborane chemistry: Elements of the 10-vertex closo-isonido-isocloso continuum.

There is experimental difficulty in the isolation and structural definition of examples of compounds of the isonido 10-vertex cluster structure in order that they may be adduced to the pattern of behaviour associated with the 10-vertex closo-isonido-isocloso structural continuum in boron-containing cluster chemistry. By contrast, the closo and isocloso extremes are well recognised, with several definitive examples. An approach involving the synergic application of crystallography (using single-crystal X-ray diffraction analysis and HYDEX), multi-element NMR spectroscopy, and DFT calculations of structure and nuclear magnetic shielding, has been used to delineate and define two basic variants in the quadrilaterally open-faced 10-vertex 'isonido' {IrB9} metallaborane system. Type A variants, as in [7,7,7-(PPh3)2H-μ-3,7-H-isonido-7-IrB9 H8-9-(PPh3)] (2), have an Ir-H-B bridging hydrogen atom involving a boron atom off the open face, and an Ir-H non-bridging linkage. Type B variants, as in [8-Cl-7-(PPh3)-μ-7P,10C-(Ph2 P-ortho-C6H4)-isonido-7-IrB9H6 -9-(PPh3)] (5), have no cluster-bridging hydrogen atoms and no Ir-H unit. Previously unreported single-crystal X-ray diffraction analyses are given for isonido type-A [7-(PPh3)-μ-7P,10C-(Ph2P- ortho-C6H4)-7-H-μ-3,7-H-isonido-7-IrB9 H8-9-(PPh3)] (10), classical closo [7-(PPh3)-μ-7P,10C-(Ph2P- ortho-C6H4)-7-H-closo-7-IrB9H6 -3,9-(PPh3)2] (13) and classical nido [6-(PPh3)-μ-6P,5C-(Ph2P-o rtho-C6H4)-6-H-nido-6-IrB9H12 ] (15). Overall, the work well demonstrates the synergic usage of NMR spectroscopy, single-crystal X-ray crystallography (including HYDEX calculations) and DFT calculations of structure and nuclear shielding, to resolve ambiguous problems of chemical constitution in polyhedral boron-containing cluster chemistry, an approach that should have wider applicability.

Ten-vertex Metallaborane Chemistry: Facile, Thermally Induced, nido -> isocloso Cluster-closure Oxidation Reactions in Iridadecaborane Clusters

Four nido-iridadecaborane cluster compounds (2), and (3) lose hydrogen on heating in dichloroethane solution at ca. 80 deg C (bath) to give, in each case, an 'isocloso' iridadecaborane cluster compound.These isocloso species have been characterised by multielement n.m.r. studies and, in the case of (4), by a single-crystal X-ray crystalographic study.Crystals of (4) are monoclinic, space group P21/c with a = 1366.0(3), b = 1906(4), c = 1429.1(3) pm, β = 103.71(2) deg, and Z = 4.The 'isocloso' structures and a possible mechanism for the nido -> isocloso cluster closure are briefly discussed.

Ten-vertex Metallaborane Chemistry: Synthesis and Characterization of Some ortho-Cycloboronated nido-5- and -6-Iridadecaboranes; Crystal Structures of and

The arachno-anion - reacts with to give an 80percent yield of the known compound (1), whereas the reaction of nido-- with gives a mixture of products.These have been characterized by a combination of multi-element n.m.r. spectroscopy and single-crystal X-ray diffraction analysis to be (2) (60percent yield), (3) (20percent yield), (4) (0.1-20percent yield) and a = 1254.4(3), b = 1524.6(4), c = 1091.7(2) pm, α = 97.69(2), β = 115.09(2), γ = 88.79(2) deg, and Z = 2.Crystals of the bis(chloroform) solvate of (5) are triclinic, space group P1 with a = 1501.3(3), b = 1571.6(3), and c = 1478.1(3) pm, α = 104.27(2), β = 113.81(2), γ = 97.98(2) deg, and Z = 2.A further compound was isolated and tentatively identified as a phosphine-substituted nido-6-iridadecaborane.A scheme to explain the mixture of products is briefly discussed.

Quantitative ortho-Cycloboronation of P-Phenyl Groups in Metallaborane Chemistry and the Crystal and Molecular Structure of the Novel iso-closo-Ten-vertex Metallaborane

High-yield ortho-cycloboronation reactions of P-phenyl groups on phosphine ligands in iridadecaboranes accompany both nido cluster expansion and nido -> closo cluster closing processes that are associated with changes in the formal oxidation state of the metal atom; one of the products has a novel iso-closo-ten-vertex iridium(V) metallaborane cluster structure of idealized C3v symmetry (IrB3B3B3).