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Crystal engineering and structural diversity of 2-aminopyridinium hypodiphosphates obtained by crystallization and dehydration
Organic-inorganic salts and ionic co-crystals of hypodiphosphoric acid (H 4 P 2 O 6 ) with 2-aminopyridine (2ap) have been synthesized and characterized by X-ray crystallography, thermogravimetry, elemental analysis and Fourier-transform infrared spectroscopy. (2apH) 4 (H 3 P 2 O 6 ) 2 (H 2 P 2 O 6...
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| Published in: | CrystEngComm 2022-06, Vol.24 (24), p.4417-4429 |
|---|---|
| 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: | Organic-inorganic salts and ionic co-crystals of hypodiphosphoric acid (H
4
P
2
O
6
) with 2-aminopyridine (2ap) have been synthesized and characterized by X-ray crystallography, thermogravimetry, elemental analysis and Fourier-transform infrared spectroscopy. (2apH)
4
(H
3
P
2
O
6
)
2
(H
2
P
2
O
6
)·2H
2
O (
1
), (2apH)
2
(H
2
P
2
O
6
)·2H
2
O (
4
), (2apH)
2
(H
2
P
2
O
6
)·(H
4
P
2
O
6
) (
6
) and (2apH)
2
(H
2
P
2
O
6
)·2(2ap) (
7
) were obtained in crystalline form in a typical solution-crystallization process. Compounds (2apH)
4
(H
3
P
2
O
6
)
2
(H
2
P
2
O
6
)·0.4H
2
O (
2
), (2apH)
4
(H
3
P
2
O
6
)
2
(H
2
P
2
O
6
)·0.1H
2
O (
3
) and (2apH)
2
(H
2
P
2
O
6
) (
5
) were formed during dehydration processes of (
1
) and (
4
), respectively, which took place as destructive transformations. Further annealing of compound (
5
) results in its partial decomposition into the anhydrous form of compound (
3
). Water removal is associated with a rearrangement of the crystal architecture and with the partial deformation of hypodiphosphate anions from the typical staggered conformation towards an eclipsed one.
Organic-inorganic salts and ionic co-crystals of hypodiphosphoric acid (H
4
P
2
O
6
) with 2-aminopyridine (2ap) are reported and the dehydration of water-containing substances to produce new crystal forms otherwise inaccessible is described. |
|---|---|
| ISSN: | 1466-8033 1466-8033 |
| DOI: | 10.1039/d2ce00261b |