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Synthesis and structures of antimony trifluoride complexes with N-heterocyclic ligands

Synthesis and structures of antimony trifluoride complexes with N-heterocyclic ligands
Synthesis and structures of antimony trifluoride complexes with N-heterocyclic ligands
The reaction of SbF3 with 2,2?-bipyridyl in anhydrous methanol produces [SbF3(bipy)]·[SbF3(MeOH)], the structure of which comprises co-crystallised neutral centrosymmetric [F2(bipy)Sb(?-F)2Sb(bipy)F2] dimers, with neutral four-coordinate [SbF3(MeOH)] units. These are linked by longer fluorine contacts, each antimony achieving a distorted seven-coordinate geometry. [SbF3(bipy)·H2O] was obtained from iPrOH solution, but hydrolysis in solution readily forms [bipyH][Sb2F7]. [SbF3(phen)], also containing seven-coordinate antimony, is produced from SbF3 and 1,10-phenanthroline in MeOH, but [SbF3(2,2?6?,2?-terpyridyl)] has a six-coordinate antimony centre (pentagonal pyramidal) with no significant intermolecular contacts to neighbouring molecules. In [SbF3(pyNO)] polymeric chains involving bridging fluorine and pyridine-N-oxide are present, again resulting in a very distorted seven-coordinate geometry at Sb. The geometries present in these N-heterocycle adducts are compared with those in pnictogen oxide and crown ether complexes. Attempts to isolate complexes of SbF3 with soft donors (PMe3, SMe2 etc.) have been unsuccessful, as were attempts to form complexes with SbF3 functioning as a Lewis base towards metal carbonyls
0022-1139
108-113
Benjamin, Sophie L.
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Burt, Jennifer
17920177-82d7-4017-9cc5-1460aff467f9
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Reid, Gillian
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Webster, Michael
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7
Benjamin, Sophie L.
3efd7555-c2e0-4330-a289-681bd13700df
Burt, Jennifer
17920177-82d7-4017-9cc5-1460aff467f9
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Webster, Michael
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7

Benjamin, Sophie L., Burt, Jennifer, Levason, William, Reid, Gillian and Webster, Michael (2012) Synthesis and structures of antimony trifluoride complexes with N-heterocyclic ligands. Journal of Fluorine Chemistry, 135, 108-113. (doi:10.1016/j.jfluchem.2011.09.007).

Record type: Article

Abstract

The reaction of SbF3 with 2,2?-bipyridyl in anhydrous methanol produces [SbF3(bipy)]·[SbF3(MeOH)], the structure of which comprises co-crystallised neutral centrosymmetric [F2(bipy)Sb(?-F)2Sb(bipy)F2] dimers, with neutral four-coordinate [SbF3(MeOH)] units. These are linked by longer fluorine contacts, each antimony achieving a distorted seven-coordinate geometry. [SbF3(bipy)·H2O] was obtained from iPrOH solution, but hydrolysis in solution readily forms [bipyH][Sb2F7]. [SbF3(phen)], also containing seven-coordinate antimony, is produced from SbF3 and 1,10-phenanthroline in MeOH, but [SbF3(2,2?6?,2?-terpyridyl)] has a six-coordinate antimony centre (pentagonal pyramidal) with no significant intermolecular contacts to neighbouring molecules. In [SbF3(pyNO)] polymeric chains involving bridging fluorine and pyridine-N-oxide are present, again resulting in a very distorted seven-coordinate geometry at Sb. The geometries present in these N-heterocycle adducts are compared with those in pnictogen oxide and crown ether complexes. Attempts to isolate complexes of SbF3 with soft donors (PMe3, SMe2 etc.) have been unsuccessful, as were attempts to form complexes with SbF3 functioning as a Lewis base towards metal carbonyls

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Accepted/In Press date: 15 September 2011
e-pub ahead of print date: 21 September 2011
Published date: March 2012
Organisations: Chemistry

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Local EPrints ID: 336928
URI: http://eprints.soton.ac.uk/id/eprint/336928
ISSN: 0022-1139
PURE UUID: 72e208b0-a438-4101-a3dd-19f5648ea0d2
ORCID for William Levason: ORCID iD orcid.org/0000-0003-3540-0971
ORCID for Gillian Reid: ORCID iD orcid.org/0000-0001-5349-3468

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Date deposited: 11 Apr 2012 14:14
Last modified: 15 Mar 2024 02:45

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Contributors

Author: Sophie L. Benjamin
Author: Jennifer Burt
Author: William Levason ORCID iD
Author: Gillian Reid ORCID iD
Author: Michael Webster

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