Chemistry of dithia-, selenathia-, and diselenaboranes

Friesen, Gabi; Barriola, Antonio M.; Daluga, Paul; Ragatz, P.; Huffman, John C.; Todd, Lee J.

doi:10.1021/ic50204a035

Cited by 60 publications

(17 citation statements)

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“…The boron-selenium bond lengths, B1-Se1 and B4-Se2, are equal, 1.92 and 1.93 Å, respectively. However, they are significantly shorter as compared to those observed in other selenaborane clusters [16,19,23,24]. This may be due to the tendency of boron and selenium atoms to form polarized bonds that have a localized two-center character resulting in the observed distances [44,45].…”

Section: Introductionmentioning

confidence: 75%

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Direct insertion of sulfur, selenium and tellurium atoms into metallaborane cages using chalcogen powders

Sahoo

Mobin

Ghosh

2010

Journal of Organometallic Chemistry

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Section: Introductionmentioning

confidence: 75%

“…Apart from the carboranes and metallacarboranes, the most wide-ranging maingroup polyhedral heteroboranes are thiaboranes and thiametallaboranes. By contrast, polyborane-based boron containing clusters that also contain other group 16 elements as a cluster constituent are less [15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Direct insertion of sulfur, selenium and tellurium atoms into metallaborane cages using chalcogen powders

Sahoo

Mobin

Ghosh

2010

Journal of Organometallic Chemistry

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“…It was readily identified by mass spectrometry and NMR spectroscopic comparison with reported 6,20 data (Table I), and has close spectroscopic analogies with the diselenacobaltaborane analogue [7-(C 5 H 5 )-nido-7,11,12-CoSe 2 B 9 H 9 ] (ref. 21 ) and the more recently reported 6,20 phosphine iridium analogue [7,7,7-(PPh 3 ) 2 H-nido-7,11,12-IrS 2 B 9 H 9 ]. It has previously been prepared via the more conventional reaction between the [arachno-S 2 B 9 H 10 ] -anion 17 and [(η 5 -C 5 Me 5 )RhCl 2 ] 2 but the isolated yield was an order of magnitude lower 6,20 , at 8%.…”

Section: Resultsmentioning

confidence: 87%

Metallaborane Reaction Chemistry. Part 4. Polyhedral Thiametallaborane Synthesis via Direct Incorporation of Sulfur Into Metallaboranes

Kim

Greatrex

Kennedy

1997

Collect. Czech. Chem. Commun.

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It is a pleasure to dedicate this paper to Professor Jaromir Plesek on the occasion of his 70th birthday, in recognition both of his stimulating presence in the world community of boron chemists, and of his outstanding personal contributions to the pioneering, and the subsequent development, of polyhedral boron-containing cluster chemistry.A preliminary investigation of the direct reaction of elemental sulfur with the representative metallaboranes [6-(η 5 -C 5 Me 5 )-nido-6-RhB 9 H 13 ] and [6-(η 6 -MeC 6 Me 4 i-Pr)-nido-6-RuB 9 H 13 ] in the presence of base gives products that result from (i) the addition of one sulfur vertex and (ii) the addition of two sulfur vertices into the metallaborane cluster, as well as (iii) boron-vertex elimination accompanied by sulfur-vertex addition. Products characterised include [7-(η 5 -C 5 Me 5 )-nido-7,11,12-RhS 2 B 9 H 9 ], [7-(η 6 -MeC 6 H 4 i-Pr)-nido-7,11,12-RuS 2 B 9 H 9 ], [8-(η 6 -MeC 6 H 4 i-Pr)-nido-8,7-RuSB 9 H 11 ], and a species tentatively identified as [9-(η 6 -MeC 6 H 4 i-Pr)-nido-9,7,8-RuS 2 B 8 H 8 ].

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“…The experimentally known [3,34,68] [69] nido-7,9-S 2 B 9 H 9 (DA) is the most stable isomer as it lacks any structural feature. None of the dithiaborane starting geometries with two adjacent sulfur atoms optimized successfully but converged to rearranged structures.…”

Section: Thia(carba)boranes and -Boratesmentioning

confidence: 99%

“…The latter is more stable and is [69]. Relative energies of five SeSB 9 H 9 isomers are given in Table 7.…”

mentioning

confidence: 99%

Periodic trends and easy estimation of relative stabilities in 11-vertex nido-p-block-heteroboranes and -borates

Kiani¹,

Hofmann²

Highlights in Computational Chemistry II

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Density functional theory computations were carried out for 11-vertex nido-p-block-hetero(carba)boranes and -borates containing silicon, germanium, tin, arsenic, antimony, sulfur, selenium and tellurium heteroatoms. A set of quantitative values called ''estimated energy penalties'' was derived by comparing the energies of two reference structures that differ with respect to one structural feature only. These energy penalties behave additively, i.e., they allow us to reproduce the DFT-computed relative stabilities of 11-vertex nidoheteroboranes in general with good accuracy and to predict the thermodynamic stabilities of unknown structures easily. Energy penalties for neighboring heteroatoms (HetHet and HetHet¢) decrease down the group and increase along the period (indirectly proportional to covalent radii). Energy penalties for a fiverather than four-coordinate heteroatom, [Het 5k (1) and Het 5k (2)], generally, increase down group 14 but decrease down group 16, while there are mixed trends for group 15 heteroatoms. The sum of HetHet¢ energy penalties results in different but easily predictable openface heteroatom positions in the thermodynamically most stable mixed heterocarbaboranes and -borates with more than two heteroatoms.

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Chemistry of dithia-, selenathia-, and diselenaboranes

Cited by 60 publications

References 0 publications

Direct insertion of sulfur, selenium and tellurium atoms into metallaborane cages using chalcogen powders

Direct insertion of sulfur, selenium and tellurium atoms into metallaborane cages using chalcogen powders

Metallaborane Reaction Chemistry. Part 4. Polyhedral Thiametallaborane Synthesis via Direct Incorporation of Sulfur Into Metallaboranes

Periodic trends and easy estimation of relative stabilities in 11-vertex nido-p-block-heteroboranes and -borates

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