The effects of protonated heterocyclic cations on the structural and magnetic properties of tetrachlorocuprate(ii) anions; X-ray, magnetochemical and EPR studiesElectronic supplementary information (ESI) available. CCDC 1455402 (2) and 1530155 (3). For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c8nj03155j
The crystal and molecular structures and magnetic properties of two new complexes (HMepy) 2 [CuCl 4 ]·2H 2 O, 2 , and (H 2 Me 2 ppz)[CuCl 4 ], 3 , formed by tetrachlorocuprate( ii ) anions and organic heterocyclic cations, bis(3-amino-2-chloro-5-methylpyridinium) (HMepy) and trans -2,5-dimethylpiper...
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| Main Authors | , , , |
|---|---|
| Format | Journal Article |
| Published |
24.09.2018
|
| Online Access | Get full text |
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| Summary: | The crystal and molecular structures and magnetic properties of two new complexes (HMepy)
2
[CuCl
4
]·2H
2
O,
2
, and (H
2
Me
2
ppz)[CuCl
4
],
3
, formed by tetrachlorocuprate(
ii
) anions and organic heterocyclic cations, bis(3-amino-2-chloro-5-methylpyridinium) (HMepy) and
trans
-2,5-dimethylpiperazinium (H
2
Me
2
ppz), respectively, have been determined by the analysis of their X-ray diffraction data, magnetic susceptibility behaviour and EPR spectral parameters. These characteristics differentiate the [CuCl
4
]
2−
anions in
2
and
3
as well as that previously reported in (H
2
bipip)[CuCl
4
]·H
2
O,
1
, (bipip = 4,4′-bipiperidine) (Tuikka
et al.
,
CrystEngComm
, 2013,
15
, 6177; Wikaira
et al.
,
J. Coord. Chem.
, 2016,
69
(1), 57). The present study reveals a significant effect of the organic cations on the geometry and magnetic properties of the [CuCl
4
]
2−
anions caused evidently by the changes in the crystal packing structure. A characteristic relationship was observed between the average
cis
-angles around the Cu(
ii
) ions in [CuCl
4
]
2−
for
1-3
, affected by the Cu(
ii
) coordination geometry, and
g
-tensor components derived from the EPR spectra, a measure of interaction of copper(
ii
) unpaired electrons in the [CuCl
4
]
2−
anions with an external magnetic field. The magneto-structural correlations revealed weak antiferromagnetic exchange interactions between the [CuCl
4
]
2−
anions transmitted by different pathways.
The crystal and molecular structures and magnetic properties of two new complexes (HMepy)
2
[CuCl
4
]·2H
2
O,
2
, and (H
2
Me
2
ppz)[CuCl
4
],
3
, formed by tetrachlorocuprate(
ii
) anions and organic heterocyclic cations, have been determined by the analysis of their X-ray diffraction data, magnetic susceptibility behaviour and EPR spectral parameters. |
|---|---|
| Bibliography: | Electronic supplementary information (ESI) available. CCDC For ESI and crystallographic data in CIF or other electronic format see DOI 10.1039/c8nj03155j 1455402 2 3 and 1530155 ( |
| ISSN: | 1144-0546 1369-9261 |
| DOI: | 10.1039/c8nj03155j |