Structural diversity of Sn(II) phosphine oxide complexes with weakly coordinating anions and comparisons with related Ge(II) and Pb(II) species
Structural diversity of Sn(II) phosphine oxide complexes with weakly coordinating anions and comparisons with related Ge(II) and Pb(II) species
A series of tin(II) triflate phosphine oxide complexes has been prepared from the reaction of Sn(OTf)2 (OTf− = [O3SCF3]−) with various ratios of OPPh3, OPMe3 or dppmO2 (dppmO2 = Ph2(O)PCH2P(O)Ph2). The complexes [Sn(OPPh3)n][OTf]2 (n = 2, 3 or 4), [Sn(OPMe3)n][OTf]2 (n = 2 or 3) and [Sn(dppmO2)n][OTf]2 (n = 1 or 2) have been isolated in moderate to good yields. Selected germanium(II) and lead(II) analogues have been made for comparison, namely [Ge(OPPh3)n][OTf]2 (n = 2 or 3) and [Pb(OPR3)4][OTf]2 (R = Me, Ph). The effect of changing the weakly coordinating OTf− anion for the non-coordinating [BArF]− anion was investigated through anion metathesis, furnishing the complexes [Sn(OPPh3)n][BArF]2 (n = 3 or 4) and [Ge(OPPh3)3][BArF]2. The isolated solids were characterised by 1H, 19F{1H}, 31P{1H} and IR spectroscopy and microanalysis. Crystal structures were obtained for all complexes except [Ge(OPPh3)2][OTf]2 and [Sn(OPPh3)3][BArF]2, allowing comparisons of the structural features of these divalent group 14 complexes down the group and as a function of coordination number, ligand sterics and electronics.
Anions, Germanium, Lead, Phosphine Oxides, Tin, X-ray diffraction
King, Rhys P.
3e91cce6-70fa-4c2b-beea-248665f01585
Cairns, Kelsey R.
4d3b3ad3-d47a-4930-b55f-de1533c552a4
Denman, Charlotte
28860ae1-bc74-4c94-841c-b226c9405536
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Light, Mark E.
cf57314e-6856-491b-a8d2-2dffc452e161
Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037
1 July 2024
King, Rhys P.
3e91cce6-70fa-4c2b-beea-248665f01585
Cairns, Kelsey R.
4d3b3ad3-d47a-4930-b55f-de1533c552a4
Denman, Charlotte
28860ae1-bc74-4c94-841c-b226c9405536
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Light, Mark E.
cf57314e-6856-491b-a8d2-2dffc452e161
Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037
King, Rhys P., Cairns, Kelsey R., Denman, Charlotte, Levason, William, Light, Mark E. and Reid, Gillian
(2024)
Structural diversity of Sn(II) phosphine oxide complexes with weakly coordinating anions and comparisons with related Ge(II) and Pb(II) species.
European Journal of Inorganic Chemistry, 27 (23), [e202400195].
(doi:10.1002/ejic.202400195).
Abstract
A series of tin(II) triflate phosphine oxide complexes has been prepared from the reaction of Sn(OTf)2 (OTf− = [O3SCF3]−) with various ratios of OPPh3, OPMe3 or dppmO2 (dppmO2 = Ph2(O)PCH2P(O)Ph2). The complexes [Sn(OPPh3)n][OTf]2 (n = 2, 3 or 4), [Sn(OPMe3)n][OTf]2 (n = 2 or 3) and [Sn(dppmO2)n][OTf]2 (n = 1 or 2) have been isolated in moderate to good yields. Selected germanium(II) and lead(II) analogues have been made for comparison, namely [Ge(OPPh3)n][OTf]2 (n = 2 or 3) and [Pb(OPR3)4][OTf]2 (R = Me, Ph). The effect of changing the weakly coordinating OTf− anion for the non-coordinating [BArF]− anion was investigated through anion metathesis, furnishing the complexes [Sn(OPPh3)n][BArF]2 (n = 3 or 4) and [Ge(OPPh3)3][BArF]2. The isolated solids were characterised by 1H, 19F{1H}, 31P{1H} and IR spectroscopy and microanalysis. Crystal structures were obtained for all complexes except [Ge(OPPh3)2][OTf]2 and [Sn(OPPh3)3][BArF]2, allowing comparisons of the structural features of these divalent group 14 complexes down the group and as a function of coordination number, ligand sterics and electronics.
Text
Eur J Inorg Chem - 2024 - King - Structural Diversity of Sn II Phosphine Oxide Complexes with Weakly Coordinating Anions
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Accepted/In Press date: 20 May 2024
e-pub ahead of print date: 20 May 2024
Published date: 1 July 2024
Keywords:
Anions, Germanium, Lead, Phosphine Oxides, Tin, X-ray diffraction
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Local EPrints ID: 492709
URI: http://eprints.soton.ac.uk/id/eprint/492709
ISSN: 1434-1948
PURE UUID: 25f2d020-7f0b-48a7-8b7c-6b9d7befcf9e
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Date deposited: 12 Aug 2024 16:45
Last modified: 19 Dec 2024 03:02
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Author:
Rhys P. King
Author:
Kelsey R. Cairns
Author:
Charlotte Denman
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