Crystal structure of tetrakis(N,N-dimethylformamide-O)- borane bis(tribromide) bromide, {B[(CH3)2NCHO]4}(Br3)2Br

Bekaert, Alain; Barberan, Olivier; Kaloun, El Bachir; Rabhi, C.; Danan, A.; Brion, J.; Lemoine, Pascale; Viossat, Β.

doi:10.1524/ncrs.2002.217.jg.507

Cited by 7 publications

(4 citation statements)

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“…Coordination of bis CDP 5 to aluminum or gallium. 13), P3À C2À P4 122.98 (10), P4À C2À B1 123.17 (13), B1À C2À P3 113.84 (12). For 1: B1À C1 1.52(2), B1À C2 1.53(2), B1À C3 1.699 (18), C1À P1 1.743 (18), C1À P2 1.723 (15), C2À P3 1.754 (14), C2À P4 1.697 (14), C3À P1 1.736 (16), C1À B1À C2 140.2 (12), C2À B1À C3 122.2 (10), C3À B1À C1 96.3 (10), P1À C1À P2 126.5 (12), P2À C1À B1 143.4(13), B1À C1À P1 89.2(9), P3À C2À P4 124.4 (10), P4À C2À B1 113.5 (10), B1À C2À P3 121.5 (9), C1À P1À C3 87.5 (9), P1À C3À B1 84.1 (8).…”

Section: Bottom)mentioning

confidence: 99%

“…Note that the reported boron trication is limited to four‐coordinate tetrahedral structure VI (Figure 1d). [10,11,12] …”

Section: Introductionmentioning

confidence: 99%

“…To date, there have been reported monocationic boron species bearing two, three or four coordinating ligands (I, II and III; Figure 1a), [7,8,9] and dicationic borons with three or four coordinating ligands (IV and V; Figure 1b, 1c) in addition to tricationic boron species with four neutral ligands (VI; Figure 1d). [10,11,12] As four-coordinate dicationic boron species, a pioneering work was reportedby Ryschkewitsch in 1980 in the synthesis of pyridine complex IVa, [13,14] whose structure was later determined in 2008. [12] Further examples reported were by Schmidbaur in 1988 with phosphine ligand (IVb and IVc), [15] Cowley in 2007 with diketiminate ligand (IVd), [16] Braunschweig in 2008 with ferrocenyl ligand (IVe), [17] and Bourissou in 2016 (IVf).…”

Section: Introductionmentioning

confidence: 99%

“…Note that the reported boron trication is limited to four-coordinate tetrahedral structure VI (Figure 1d). [10,11,12] As an approach to the two-coordinate boron trication, we designed and employed a cyclic bis(carbodiphosphorane) skeleton 5 in this study (Figure 2). Carbodiphosphoranes (CDPs), first reported in 1961, [21] have drawn attention to their electronic situation, which is now regarded as a variation of carbone species, carbon(0) compounds coordinated by two neutral ligands.…”

Section: Introductionmentioning

confidence: 99%

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Boron Polycation Supported by Cyclic Bis(carbodiphosphorane)

Saitō

Kusumoto

Nozaki

2023

Chemistry A European J

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A novel cyclic bis(carbodiphosphorane) ligand was prepared and investigated in coordination with group 13 elements, B, Al and Ga. Al and Ga afforded dinuclear adduct where two metal centers were bridged by the bis(carbodiphosphorane) ligand. In contrast, the reaction with boron trichloride afforded a monomeric dicationic three‐coordinate boron species composed of one boron moieties and one ligand. The structures of these products were determined by X‐ray crystallography. In the dicationic boron compound, the sterically constrained cyclic structure enforced the boron center to acquire strained trigonal geometry with wide C‐B‐C angle of 140°. Furthermore, theoretical investigation with DFT and NBO suggested a significant contribution of tricationic two‐coordinate boron resonance structure supported by two CDP ligands.

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Section: Bottom)mentioning

confidence: 99%

“…Note that the reported boron trication is limited to four‐coordinate tetrahedral structure VI (Figure 1d). [10,11,12] …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Boron Polycation Supported by Cyclic Bis(carbodiphosphorane)

Saitō

Kusumoto

Nozaki

2023

Chemistry A European J

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A Di‐Substituted Boron Dication and Its Hydride‐Induced Transformation to an NHC‐Stabilized Borabenzene

et al. 2013

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The intrinsic electron deficiency of borane derivatives stems from the presence of a low-lying empty p orbital on the boron atom. Methods to further increase the Lewis acidity of boranes include the incorporation of a boron atom into an anti-aromatic system [1] and the introduction of electronwithdrawing groups, such as halogens, [2] Lewis acidic elements, [3] and cationic functionalities. [4] Compared with the cationic boranes, for which the formal positive charges are located on the peripheral functionalities, boron cations are markedly more electron deficient and have been identified as the active intermediates in various organic transformations. [5] Boron monocations can be classified into three categories, dicoordinated borinium, tri-coordinated borenium, and tetracoordinated boronium ions (Scheme 1). [6] The electron deficiency of the boron atom decreases as its coordination number increases.By replacing the R substituents of the boronium cation with additional neutral ligands, the number of positive charges on the boron atom could exceed one. [7] Several tetra-coordinated boron dications and trications have been structurally characterized. [8] However, the dication version of [**] This study was supported by the National Science Council of Taiwan (NSC 99-2113-M-002-011-MY2 and NSC 101-2113-M-002-013-MY2). C.-W.C. extends gratitude to the Kenda Foundation for the Golden-Jade Fellowship. NHC = N-heterocyclic carbene.

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