Single Isomer Heterometallic {CrIII6MII2} Rings Templated by Tetramethylammonium

Rajeh Alotaibi; Edmund Little; Jonathan Fowler; Adam Brookfield; Ralph Adams; Amritroop Achari; Grigore Timco; George F S Whitehead; Nicholas Chilton; Rahul Raveendran Nair; David Collison; Richard Winpenny

Single Isomer Heterometallic {CrIII6MII2} Rings Templated by Tetramethylammonium

Rajeh Alotaibi, Edmund Little, Jonathan Fowler, Adam Brookfield, Ralph Adams, Amritroop Achari, Grigore Timco, George F S Whitehead, Nicholas Chilton, Rahul Raveendran Nair, David Collison, Richard Winpenny

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

Abstract

A family of heterometallic rings [Me4N]2[CrIII6MII2F8(O2CtBu)16] is reported using tetramethylammonium hydroxide pentahydrate as the source of a template, where MII = ZnII, MnII, NiII, and CoII. The metal cores are octagons with metal-metal edges bridged by one fluoride and two carboxylate ligands. The divalent metal ions are found ordered at positions 1 and 5 in the octagon. The tetramethylammonium cations are above and below the metal plane of the ring in the crystal structure. Magnetic studies show antiferromagnetic coupling between the paramagnetic metal ions present, leading to paramagnetic ground states in each case. 1H NMR spectroscopy confirms the structure of the {CrIII6CoII2} ring exists in solution and EPR spectroscopy confirms the magnetic structure of the other three rings.

Original language	English
Journal	Inorganic Chemistry
Publication status	Published - 2021

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@article{bfbdafda797e4c1bac5cbaccf8a5bf1d,

title = "Single Isomer Heterometallic {CrIII6MII2} Rings Templated by Tetramethylammonium",

abstract = "A family of heterometallic rings [Me4N]2[CrIII6MII2F8(O2CtBu)16] is reported using tetramethylammonium hydroxide pentahydrate as the source of a template, where MII = ZnII, MnII, NiII, and CoII. The metal cores are octagons with metal-metal edges bridged by one fluoride and two carboxylate ligands. The divalent metal ions are found ordered at positions 1 and 5 in the octagon. The tetramethylammonium cations are above and below the metal plane of the ring in the crystal structure. Magnetic studies show antiferromagnetic coupling between the paramagnetic metal ions present, leading to paramagnetic ground states in each case. 1H NMR spectroscopy confirms the structure of the {CrIII6CoII2} ring exists in solution and EPR spectroscopy confirms the magnetic structure of the other three rings.",

author = "Rajeh Alotaibi and Edmund Little and Jonathan Fowler and Adam Brookfield and Ralph Adams and Amritroop Achari and Grigore Timco and Whitehead, {George F S} and Nicholas Chilton and {Raveendran Nair}, Rahul and David Collison and Richard Winpenny",

year = "2021",

language = "English",

journal = "Inorganic Chemistry ",

issn = "0020-1669",

publisher = "American Chemical Society",

}

TY - JOUR

T1 - Single Isomer Heterometallic {CrIII6MII2} Rings Templated by Tetramethylammonium

AU - Alotaibi, Rajeh

AU - Little, Edmund

AU - Fowler, Jonathan

AU - Brookfield, Adam

AU - Adams, Ralph

AU - Achari, Amritroop

AU - Timco, Grigore

AU - Whitehead, George F S

AU - Chilton, Nicholas

AU - Raveendran Nair, Rahul

AU - Collison, David

AU - Winpenny, Richard

PY - 2021

Y1 - 2021

N2 - A family of heterometallic rings [Me4N]2[CrIII6MII2F8(O2CtBu)16] is reported using tetramethylammonium hydroxide pentahydrate as the source of a template, where MII = ZnII, MnII, NiII, and CoII. The metal cores are octagons with metal-metal edges bridged by one fluoride and two carboxylate ligands. The divalent metal ions are found ordered at positions 1 and 5 in the octagon. The tetramethylammonium cations are above and below the metal plane of the ring in the crystal structure. Magnetic studies show antiferromagnetic coupling between the paramagnetic metal ions present, leading to paramagnetic ground states in each case. 1H NMR spectroscopy confirms the structure of the {CrIII6CoII2} ring exists in solution and EPR spectroscopy confirms the magnetic structure of the other three rings.

AB - A family of heterometallic rings [Me4N]2[CrIII6MII2F8(O2CtBu)16] is reported using tetramethylammonium hydroxide pentahydrate as the source of a template, where MII = ZnII, MnII, NiII, and CoII. The metal cores are octagons with metal-metal edges bridged by one fluoride and two carboxylate ligands. The divalent metal ions are found ordered at positions 1 and 5 in the octagon. The tetramethylammonium cations are above and below the metal plane of the ring in the crystal structure. Magnetic studies show antiferromagnetic coupling between the paramagnetic metal ions present, leading to paramagnetic ground states in each case. 1H NMR spectroscopy confirms the structure of the {CrIII6CoII2} ring exists in solution and EPR spectroscopy confirms the magnetic structure of the other three rings.

M3 - Article

SN - 0020-1669

JO - Inorganic Chemistry

JF - Inorganic Chemistry

ER -

Single Isomer Heterometallic {CrIII6MII2} Rings Templated by Tetramethylammonium

Abstract

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