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Polyborate anions partnered with large non-metal cations: triborate(1-), pentaborate(1-), and heptaborate(2-) salts

Polyborate anions partnered with large non-metal cations: triborate(1-), pentaborate(1-), and heptaborate(2-) salts
Polyborate anions partnered with large non-metal cations: triborate(1-), pentaborate(1-), and heptaborate(2-) salts
New polyborate salts containing bulky non-metal cations have been prepared from either the free organic base or the [non-metal cation][OH] in methanolic aqueous solution: 1-adamantylammonium pentaborate [C10H18N][B5O6(OH)4] (1), 2-adamantylammonium pentaborate dihydrate [C10H18N][B5O6(OH)4].2H2O (2), N,N-dimethyl-1-adamantylammonium pentaborate.boric acid monohydrate [C12H22N][B5O6(OH)4].B(OH)3.H2O (3), N,N,N-trimethyl-1-adamantylammonium pentaborate trihydrate [C13H24N][B5O6(OH)4].3H2O (4), N,N,N-trimethyl-2-adamantylammonium pentaborate trihydrate [C13H24N][B5O6(OH)4].3H2O (5), dibenzylammonium pentaborate sesquihydrate [C14H16N][B5O6(OH)4].1.5H2O (6), bis(triphenylphosphine)iminium pentaborate sesquihydrate [C36H30NP2][B5O6(OH)4].1.5H2O (7), bis(triphenylphosphine)iminium triborate.2.5 hydrate [C36H30NP2][B3O3(OH)4].2.5H2O (8), 4,4’-bipiperidinium heptaborate dihydrate [C10H22N2][B7O9(OH)5].2H2O (9). All compounds were characterized by thermal (TGA/DSC), and spectroscopic analysis (NMR, IR). Compounds 3 - 5 and 9 have been characterized by single-crystal XRD studies. The waters of crystallization in 3 - 6 and the boric acid of crystallization in 3 play important structural roles in expanding the supramolecular pentaborate(1-) lattices to accommodate the bulkier cations.
1434-1948
Beckett, Michael A.
5b021ef6-fa5c-4f6d-9998-3313558f0dc1
Coles, Simon J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8
Horton, Peter N.
154c8930-bfc3-495b-ad4a-8a278d5da3a5
Jones, Charlotte L.
d21b38a5-f7df-4ffd-8a7e-de716b1aeaeb
Beckett, Michael A.
5b021ef6-fa5c-4f6d-9998-3313558f0dc1
Coles, Simon J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8
Horton, Peter N.
154c8930-bfc3-495b-ad4a-8a278d5da3a5
Jones, Charlotte L.
d21b38a5-f7df-4ffd-8a7e-de716b1aeaeb

Beckett, Michael A., Coles, Simon J., Horton, Peter N. and Jones, Charlotte L. (2017) Polyborate anions partnered with large non-metal cations: triborate(1-), pentaborate(1-), and heptaborate(2-) salts. European Journal of Inorganic Chemistry. (doi:10.1002/ejic.201700551).

Record type: Article

Abstract

New polyborate salts containing bulky non-metal cations have been prepared from either the free organic base or the [non-metal cation][OH] in methanolic aqueous solution: 1-adamantylammonium pentaborate [C10H18N][B5O6(OH)4] (1), 2-adamantylammonium pentaborate dihydrate [C10H18N][B5O6(OH)4].2H2O (2), N,N-dimethyl-1-adamantylammonium pentaborate.boric acid monohydrate [C12H22N][B5O6(OH)4].B(OH)3.H2O (3), N,N,N-trimethyl-1-adamantylammonium pentaborate trihydrate [C13H24N][B5O6(OH)4].3H2O (4), N,N,N-trimethyl-2-adamantylammonium pentaborate trihydrate [C13H24N][B5O6(OH)4].3H2O (5), dibenzylammonium pentaborate sesquihydrate [C14H16N][B5O6(OH)4].1.5H2O (6), bis(triphenylphosphine)iminium pentaborate sesquihydrate [C36H30NP2][B5O6(OH)4].1.5H2O (7), bis(triphenylphosphine)iminium triborate.2.5 hydrate [C36H30NP2][B3O3(OH)4].2.5H2O (8), 4,4’-bipiperidinium heptaborate dihydrate [C10H22N2][B7O9(OH)5].2H2O (9). All compounds were characterized by thermal (TGA/DSC), and spectroscopic analysis (NMR, IR). Compounds 3 - 5 and 9 have been characterized by single-crystal XRD studies. The waters of crystallization in 3 - 6 and the boric acid of crystallization in 3 play important structural roles in expanding the supramolecular pentaborate(1-) lattices to accommodate the bulkier cations.

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Accepted/In Press date: 12 May 2017
e-pub ahead of print date: 31 July 2017

Identifiers

Local EPrints ID: 414760
URI: http://eprints.soton.ac.uk/id/eprint/414760
ISSN: 1434-1948
PURE UUID: f44fcfc0-c0b5-44d8-94a9-87dd795a04c6
ORCID for Simon J. Coles: ORCID iD orcid.org/0000-0001-8414-9272
ORCID for Peter N. Horton: ORCID iD orcid.org/0000-0001-8886-2016

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Date deposited: 10 Oct 2017 16:31
Last modified: 17 Dec 2019 05:52

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Contributors

Author: Michael A. Beckett
Author: Simon J. Coles ORCID iD
Author: Peter N. Horton ORCID iD
Author: Charlotte L. Jones

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