Synthesis of ligands containing N-oxide donor atoms and their assembly into metallosupramolecular structures

Samantha J. Bullock; Lindsay P. Harding; Michelle P. Moore; Andrew Mills; Sean A.F. Piela; Craig R. Rice; Liz Towns-Andrews; Martina Whitehead

doi:10.1039/c3dt00090g

Synthesis of ligands containing N-oxide donor atoms and their assembly into metallosupramolecular structures

Samantha J. Bullock, Lindsay P. Harding, Michelle P. Moore, Andrew Mills, Sean A.F. Piela, Craig R. Rice, Liz Towns-Andrews, Martina Whitehead

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

A series of ligands that contain both N-donor and N-oxide donor atoms have been synthesised and ligands L⁵, L⁶, L⁷ and L⁸ contain, 4, 6, 5, and 6 donor atoms respectively. The smallest ligand L⁵ forms a mononuclear complex with Cu²⁺ ([Cu(L⁵)(ClO₄)₂(MeCN)]) whereas L⁶ and L⁷ form dinuclear double helicates with Ni²⁺ and Cu²⁺ respectively ([Ni₂(L⁶)₂] ⁴⁺ and [Cu₂(L⁷)₂]⁴⁺). L⁸ forms a tetranuclear cyclic helicate upon reaction with Co ²⁺ ([Co₄(L⁸)₄]⁸⁺) and in all cases the complexes are characterised by single-crystal X-ray diffraction and ESI-MS. The N-oxide units imparts flexibility in the ligand strand and where the unoxidised ligand strand forms a cyclic helicate, the incorporation of an N-oxide unit allows the formation of the dinuclear double helicate.

Original language	English
Pages (from-to)	5805-5811
Number of pages	7
Journal	Dalton Transactions
Volume	42
Issue number	16
DOIs	https://doi.org/10.1039/c3dt00090g
Publication status	Published - 28 Apr 2013

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title = "Synthesis of ligands containing N-oxide donor atoms and their assembly into metallosupramolecular structures",

abstract = "A series of ligands that contain both N-donor and N-oxide donor atoms have been synthesised and ligands L5, L6, L7 and L8 contain, 4, 6, 5, and 6 donor atoms respectively. The smallest ligand L5 forms a mononuclear complex with Cu2+ ([Cu(L5)(ClO4)2(MeCN)]) whereas L6 and L7 form dinuclear double helicates with Ni2+ and Cu2+ respectively ([Ni2(L6)2] 4+ and [Cu2(L7)2]4+). L8 forms a tetranuclear cyclic helicate upon reaction with Co 2+ ([Co4(L8)4]8+) and in all cases the complexes are characterised by single-crystal X-ray diffraction and ESI-MS. The N-oxide units imparts flexibility in the ligand strand and where the unoxidised ligand strand forms a cyclic helicate, the incorporation of an N-oxide unit allows the formation of the dinuclear double helicate.",

author = "Bullock, {Samantha J.} and Harding, {Lindsay P.} and Moore, {Michelle P.} and Andrew Mills and Piela, {Sean A.F.} and Rice, {Craig R.} and Liz Towns-Andrews and Martina Whitehead",

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T1 - Synthesis of ligands containing N-oxide donor atoms and their assembly into metallosupramolecular structures

AU - Bullock, Samantha J.

AU - Harding, Lindsay P.

AU - Moore, Michelle P.

AU - Mills, Andrew

AU - Piela, Sean A.F.

AU - Rice, Craig R.

AU - Towns-Andrews, Liz

AU - Whitehead, Martina

PY - 2013/4/28

Y1 - 2013/4/28

N2 - A series of ligands that contain both N-donor and N-oxide donor atoms have been synthesised and ligands L5, L6, L7 and L8 contain, 4, 6, 5, and 6 donor atoms respectively. The smallest ligand L5 forms a mononuclear complex with Cu2+ ([Cu(L5)(ClO4)2(MeCN)]) whereas L6 and L7 form dinuclear double helicates with Ni2+ and Cu2+ respectively ([Ni2(L6)2] 4+ and [Cu2(L7)2]4+). L8 forms a tetranuclear cyclic helicate upon reaction with Co 2+ ([Co4(L8)4]8+) and in all cases the complexes are characterised by single-crystal X-ray diffraction and ESI-MS. The N-oxide units imparts flexibility in the ligand strand and where the unoxidised ligand strand forms a cyclic helicate, the incorporation of an N-oxide unit allows the formation of the dinuclear double helicate.

AB - A series of ligands that contain both N-donor and N-oxide donor atoms have been synthesised and ligands L5, L6, L7 and L8 contain, 4, 6, 5, and 6 donor atoms respectively. The smallest ligand L5 forms a mononuclear complex with Cu2+ ([Cu(L5)(ClO4)2(MeCN)]) whereas L6 and L7 form dinuclear double helicates with Ni2+ and Cu2+ respectively ([Ni2(L6)2] 4+ and [Cu2(L7)2]4+). L8 forms a tetranuclear cyclic helicate upon reaction with Co 2+ ([Co4(L8)4]8+) and in all cases the complexes are characterised by single-crystal X-ray diffraction and ESI-MS. The N-oxide units imparts flexibility in the ligand strand and where the unoxidised ligand strand forms a cyclic helicate, the incorporation of an N-oxide unit allows the formation of the dinuclear double helicate.

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U2 - 10.1039/c3dt00090g

DO - 10.1039/c3dt00090g

M3 - Article

AN - SCOPUS:84877013975

VL - 42

SP - 5805

EP - 5811

JO - Dalton Transactions

JF - Dalton Transactions

SN - 1477-9226

IS - 16

ER -

Synthesis of ligands containing N-oxide donor atoms and their assembly into metallosupramolecular structures

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