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Stopping hydrogen migration in its tracks: the first successful synthesis of group ten scorpionate complexes based on Azaindole scaffolds

Stopping hydrogen migration in its tracks: the first successful synthesis of group ten scorpionate complexes based on Azaindole scaffolds
Stopping hydrogen migration in its tracks: the first successful synthesis of group ten scorpionate complexes based on Azaindole scaffolds
The first successful synthesis and characterization of group ten complexes featuring flexible scorpionate ligands based on 7-azaindole heterocycles are reported herein. Addition of two equivalents of either K[HB(azaindolyl)3] or Li[HB(Me)(azaindolyl)2] to [M(μ-Cl)(η1,η2-COEOMe)]2 leads to the formation of two equivalents of the complexes [M{κ3-N,N,H-HB(azaindolyl)3}(η1,η2-COEOMe)] and [M{κ3-N,N,H-HB(Me)(azaindolyl)2}(η1,η2-COEOMe)] (where M = Pt, Pd; COEOMe = 8-methoxycyclooct-4-en-1-ide), respectively. In these reactions, the borohydride group is directed towards the metal center forming square based pyramidal complexes. In contrast to analogous complexes featuring other flexible scorpionate ligands, no hydrogen migration from boron is observed in the complexes studied. The fortuitous linewidths observed in some of the 11B NMR spectra allow for a closer inspection of the B–H•••metal unit in scorpionate complexes than has previously been possible.
0020-1669
1-9
Da Costa, Rosenildo Correa
ce76806a-0dba-4086-99c2-626e9b932c80
Rawe, Benjamin W.
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Iannetelli, Angelo
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Tizzard, Graham J.
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Coles, Simon J.
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Guwy, A.
a78123af-3953-4791-84d3-ade657813e94
Owen, Gareth R.
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Da Costa, Rosenildo Correa
ce76806a-0dba-4086-99c2-626e9b932c80
Rawe, Benjamin W.
f9ac002b-5ce2-4134-9a42-821b0b843172
Iannetelli, Angelo
3f6fd91d-6ac8-433e-9e46-1c0831be4ed7
Tizzard, Graham J.
8474c0fa-40df-43a6-a662-7f3c4722dbf2
Coles, Simon J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8
Guwy, A.
a78123af-3953-4791-84d3-ade657813e94
Owen, Gareth R.
88a0d18b-a3d5-46f5-b5a8-24c03a5eb66f

Da Costa, Rosenildo Correa, Rawe, Benjamin W., Iannetelli, Angelo, Tizzard, Graham J., Coles, Simon J., Guwy, A. and Owen, Gareth R. (2018) Stopping hydrogen migration in its tracks: the first successful synthesis of group ten scorpionate complexes based on Azaindole scaffolds. Inorganic Chemistry, 1-9. (doi:10.1021/acs.inorgchem.8b02456).

Record type: Article

Abstract

The first successful synthesis and characterization of group ten complexes featuring flexible scorpionate ligands based on 7-azaindole heterocycles are reported herein. Addition of two equivalents of either K[HB(azaindolyl)3] or Li[HB(Me)(azaindolyl)2] to [M(μ-Cl)(η1,η2-COEOMe)]2 leads to the formation of two equivalents of the complexes [M{κ3-N,N,H-HB(azaindolyl)3}(η1,η2-COEOMe)] and [M{κ3-N,N,H-HB(Me)(azaindolyl)2}(η1,η2-COEOMe)] (where M = Pt, Pd; COEOMe = 8-methoxycyclooct-4-en-1-ide), respectively. In these reactions, the borohydride group is directed towards the metal center forming square based pyramidal complexes. In contrast to analogous complexes featuring other flexible scorpionate ligands, no hydrogen migration from boron is observed in the complexes studied. The fortuitous linewidths observed in some of the 11B NMR spectra allow for a closer inspection of the B–H•••metal unit in scorpionate complexes than has previously been possible.

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Accepted/In Press date: 26 November 2018
e-pub ahead of print date: 10 December 2018

Identifiers

Local EPrints ID: 426869
URI: http://eprints.soton.ac.uk/id/eprint/426869
ISSN: 0020-1669
PURE UUID: b25314c4-2cd5-4eae-91bb-f24ff4134dc4
ORCID for Graham J. Tizzard: ORCID iD orcid.org/0000-0002-1577-5779
ORCID for Simon J. Coles: ORCID iD orcid.org/0000-0001-8414-9272

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Date deposited: 14 Dec 2018 17:30
Last modified: 22 Nov 2021 07:01

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Contributors

Author: Rosenildo Correa Da Costa
Author: Benjamin W. Rawe
Author: Angelo Iannetelli
Author: Simon J. Coles ORCID iD
Author: A. Guwy
Author: Gareth R. Owen

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