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

Bekaert, A.; Barberan, O.; Kaloun, E. B.; Rabhi, C.; Danan, A.; Brion, J. D.; Lemoine, P.; Viossat, B.

doi:10.1524/ncrs.2002.217.1.507

Cited by 3 publications

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“…[12][13][14][15] In an attempt to increase the electron deficiency of boron cations, several boron di-and tri-cations have also been synthesized and structurally characterized in the past few years. [16][17][18][19][20][21][22][23] Selected boron cations that feature carbon-based ligands are shown in Fig. 1.…”

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N-Heterocyclic olefin stabilized boron dication

et al. 2016

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Boron mono- and di-cations featuring a nucleophilic N-heterocyclic olefin and the pentamethylcyclopentadienyl substituent have been prepared and structurally characterized. Experimental and theoretical investigations show that [η(5)-Cp*B-NHO](2+) is considerably more Lewis acidic than [η(5)-Cp*B-IMes](2+) due to the steric congestion imposed by the bent geometry of NHO around the central boron atom.

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confidence: 99%

N-Heterocyclic olefin stabilized boron dication

et al. 2016

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“…Chiral boron complexes have been developped in the Lewis acid catalysed hetero Diels-Alder reaction [3] or the Brönsted acid Lewis acid hetero Diels-Alder reaction [4]. The crystallographic structures of bis(catecholato)-borate [5] and tetrakis(N,N-dimethylformamide-O)borane bis-(tribromide) bromide [6] have recently been established as tetrahedral geometry. Introduction of an iodine atom into organic molecules is frequently an important step in organic synthesis since the halogen can easily be replaced by another group in a transition metal catalysed condensation.…”

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Crystal structure of tetrakis(N,N-dimethylacetamide-O)borane tris(dibromoiodide), {B[CH3CON(CH3)2)]4}(Br2I)3

Bekaert¹,

Barberan²,

Kaloun³

et al. 2003

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of materialThe title compound is prepared as following : to an ice cooled solution of 127 g (0.5 mol) of iodine in excess of dimethylacetamide (348 g, 4 mol), 150 mL of a 1M 0(2) -ions is located at inversion centre, the geometry of these three atomic systems is linear. The I-Br bond lengths situated in the range of 2.709(1) Å to 2.819(1) Å are significantly longer than those found in the bis(1,4,7-trithiacyclononane)palladium(II) bis(dibromoiodide) complex [2.683(1) Å -2.698(1) Å] in [9]. The crystal packing is characterized by the presence of layers perpendicular Z. Kristallogr. NCS 218 (2003) 123-124 123

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“…Two boron trications, 3a and 3b , with four oxygen donor ligands coordinated to the boron atom were published by Danan et al Herein we report the synthesis of [FcB(NC 5 H 4 -4-Me) 3 ][BAr f 4 ] 2 [ 4 ; Fc = ferrocenyl, Ar f = 3,5-(CF 3 ) 2 C 6 H 3 ], the second example of a structurally characterized mononuclear boron(III) dication, however, the first without chelating ligands. This compound was prepared by treating Br 2 BFc with 4-methylpyridine and Na[BAr f 4 ] in a molar ratio of 1:3:2.…”

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