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Complexes of BX3 with EMe2 (X ¼ F, Cl, Br, I; E ¼ Se or Te: Synthesis, multinuclear NMR spectroscopic and structural studies

Complexes of BX3 with EMe2 (X ¼ F, Cl, Br, I; E ¼ Se or Te: Synthesis, multinuclear NMR spectroscopic and structural studies
Complexes of BX3 with EMe2 (X ¼ F, Cl, Br, I; E ¼ Se or Te: Synthesis, multinuclear NMR spectroscopic and structural studies
The [BX3(EMe2)] (X ¼ Cl, Br, I; E ¼ Se or Te) have been prepared by reaction of BX3 with the EMe2 in hexane under anhydrous conditions. The X-ray crystal structures of [BX3(TeMe2)] (X ¼ Cl, Br, I) and [BX3(SeMe2)] (X ¼ Cl, Br) have been determined; all are pseudo-tetrahedral monomers and show d(BE) decreases with halogen, Cl > Br > I. Multinuclear NMR data (1H, 11B, 77Se and 125Te) are reported and compared with data on the corresponding [BX3(SMe2)], and the trends discussed. The unstable [BF3(SeMe2)], prepared from BF3 and SeMe2 in the absence of a solvent, has been similarly characterised by multinuclear NMR spectroscopy, and evidence for the existence of unstable [BF3(TeMe2)] obtained for the first time, although it could not be obtained pure. The results are discussed in the light of recent theoretical modelling of boron halide adducts.
Boron halide, selenoether, telluroether, Boron-11 NMR, crystal structures
0022-328X
232-238
Okio, Coco K.Y.A.
a079519f-6872-46d3-8bfe-f6c5f00557d0
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Monzittu, Francesco M.
c0124f10-1f2e-47e5-85f4-138fab36b5d4
Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Okio, Coco K.Y.A.
a079519f-6872-46d3-8bfe-f6c5f00557d0
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Monzittu, Francesco M.
c0124f10-1f2e-47e5-85f4-138fab36b5d4
Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037

Okio, Coco K.Y.A., Levason, William, Monzittu, Francesco M. and Reid, Gillian (2017) Complexes of BX3 with EMe2 (X ¼ F, Cl, Br, I; E ¼ Se or Te: Synthesis, multinuclear NMR spectroscopic and structural studies. Journal of Organometallic Chemistry, 848, 232-238. (doi:10.1016/j.jorganchem.2017.08.004).

Record type: Article

Abstract

The [BX3(EMe2)] (X ¼ Cl, Br, I; E ¼ Se or Te) have been prepared by reaction of BX3 with the EMe2 in hexane under anhydrous conditions. The X-ray crystal structures of [BX3(TeMe2)] (X ¼ Cl, Br, I) and [BX3(SeMe2)] (X ¼ Cl, Br) have been determined; all are pseudo-tetrahedral monomers and show d(BE) decreases with halogen, Cl > Br > I. Multinuclear NMR data (1H, 11B, 77Se and 125Te) are reported and compared with data on the corresponding [BX3(SMe2)], and the trends discussed. The unstable [BF3(SeMe2)], prepared from BF3 and SeMe2 in the absence of a solvent, has been similarly characterised by multinuclear NMR spectroscopy, and evidence for the existence of unstable [BF3(TeMe2)] obtained for the first time, although it could not be obtained pure. The results are discussed in the light of recent theoretical modelling of boron halide adducts.

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Accepted/In Press date: 4 August 2017
e-pub ahead of print date: 8 August 2017
Published date: 15 October 2017
Keywords: Boron halide, selenoether, telluroether, Boron-11 NMR, crystal structures

Identifiers

Local EPrints ID: 413315
URI: http://eprints.soton.ac.uk/id/eprint/413315
ISSN: 0022-328X
PURE UUID: 4f0a0251-fc6c-42d9-97f3-4a2ccfba79a7
ORCID for William Levason: ORCID iD orcid.org/0000-0003-3540-0971
ORCID for Francesco M. Monzittu: ORCID iD orcid.org/0000-0002-7080-3795
ORCID for Gillian Reid: ORCID iD orcid.org/0000-0001-5349-3468

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Date deposited: 21 Aug 2017 16:31
Last modified: 18 Feb 2021 16:34

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Contributors

Author: Coco K.Y.A. Okio
Author: William Levason ORCID iD
Author: Francesco M. Monzittu ORCID iD
Author: Gillian Reid ORCID iD

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