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Vapochromic behaviour of a nickel()-quinonoid complex with dimensional changes between 1D and higher
The nickel( ii )-chloranilato complex {Ni(ca)(VM) 2 } n (H 2 ca = chloranilic acid, VM = coordinated vapour molecules, such as water) shows reversible vapochromism upon exposure to various vapours and subsequent drying by heating. In contrast to the Ni( ii )-quinonoid complex, [Ni(HL Me ) 2 ] (H 2 L...
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Published in: | Dalton transactions : an international journal of inorganic chemistry 2021-07, Vol.5 (25), p.8696-873 |
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Main Authors: | , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The nickel(
ii
)-chloranilato complex {Ni(ca)(VM)
2
}
n
(H
2
ca = chloranilic acid, VM = coordinated vapour molecules, such as water) shows reversible vapochromism upon exposure to various vapours and subsequent drying by heating. In contrast to the Ni(
ii
)-quinonoid complex, [Ni(HL
Me
)
2
] (H
2
L
Me
= 4-methylamino-6-methyliminio-3-oxocyclohexa-1,4-dien-1-olate), which was reported to exhibit vapochromic spin-state switching between high and low spin states, the chloranilato complex does not change its spin state even after the removal of coordinated vapour molecules. X-ray absorption fine structure (XAFS) analysis revealed that the six-coordinate geometry of {Ni(ca)(VM)
2
}
n
was maintained even after the removal of vapour molecules, in contrast to the [Ni(HL
Me
)
2
] complex. The unique vapochromism that follows the dimensional change between 1D and higher is influenced by the relatively weaker ligand field of the chloranilate ligand.
The nickel(
ii
)-chloranilato complex shows reversible vapochromism with changes in dimensionality upon exposure to various vapours and subsequent drying by heating. |
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ISSN: | 1477-9226 1477-9234 |
DOI: | 10.1039/d1dt00269d |