Reconstruction of the 1,2-dicarbaclovododecaborane(12) structure by boron-atom insertion with (3)-1,2-dicarbollide ions

Hawthorne, M. Frederick; Wegner, Patrick A.

doi:10.1021/ja01006a009

Cited by 111 publications

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“…An appealing way to prepare the 13‐vertex C 2 B 11 H 13 or its derivatives from the appropriate C 2 B 10 H 12 species is by polyhedral expansion, that is, reduction of the closo precursor to the nido dianion10 [C 2 B 10 H 12 ] 2− followed by capitation through treatment with a BRX 2 compound,11 analogous to the method employed to prepare the first 13‐vertex metallacarborane 2. Starting from 1,2‐ closo ‐C 2 B 10 H 12 we tried this many times, under a variety of conditions, and in a variety of solvents, each attempt failing to produce a supraicosahedral species.…”

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confidence: 99%

Beyond the Icosahedron: The First 13‐Vertex Carborane

et al. 2003

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Cornering the 13th vertex: The first 13‐vertex carborane (see picture, B: brown, C: gray, H: white) has been prepared by a methodology that can in principle be applied repeatedly, leading to 14‐, 15‐, 16‐, …︁ vertex carboranes in the future. The 13‐vertex species has a henicosahedral geometry, not the docosahedral one expected, but the two forms are found to be very close in energy by DFT calculations.

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confidence: 99%

Beyond the Icosahedron: The First 13‐Vertex Carborane

et al. 2003

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“…An appealing way to prepare the 13-vertex C 2 B 11 H 13 or its derivatives from the appropriate C 2 B 10 H 12 species is by polyhedral expansion, that is, reduction of the closo precursor to the nido dianion [10] [C 2 B 10 H 12 ] 2À followed by capitation through treatment with a BRX 2 compound, [11] analogous to the method employed to prepare the first 13-vertex metallacarborane. [2] Starting from 1,2-closo-C 2 B 10 H 12 we tried this many times, under a variety of conditions, and in a variety of solvents, each attempt failing to produce a supraicosahedral species.…”

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Beyond the Icosahedron: The First 13‐Vertex Carborane

et al. 2003

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Betrifft die 13. Ecke: Das erste 13‐eckige Carboran (siehe Bild; B: braun, C: grau, H: weiß) wurde mithilfe eines Verfahrens hergestellt, das prinzipiell wiederholt angewendet werden kann, sodass künftig auch 14‐, 15‐, 16‐ und mehr‐eckige Carborane zugänglich sind. Das 13‐eckige Molekül hat eine henikosaedrische und keine dokosaedrische Geometrie wie ursprünglich angenommen. Beide Konfigurationen sind gemäß DFT‐Rechnungen energetisch ähnlich.

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“…Utilizing a reaction discovered by our laboratory in the 1960s [19], 3-phenyl-1,2-C 2 B 10 H 11 was synthesized for use as a hydrophobically substituted carborane building block for the synthesis of possible hydrocarbon-soluble mercuracarborands. The synthesis was achieved in 85% yield by reacting the disodium salt of the ortho -dicarbollide ion, [nido -7,8-C 2 B 9 H 11 ] 2( , with phenylboron dichloride.…”

Section: Carborane Cages Substituted At 3-(or 6-)positionmentioning

confidence: 99%