Loading…
Channel-containing structures generated from linear coordination polymer chains containing N , N ′ -bidentate ligands and Cu–Cu dimetal units
Four new one-dimensional coordination polymers containing the dimetal cluster Cu 2(OAc) 4 have been synthesized by reacting Cu(OAc) 2 ⋅ H 2O with two different N , N ′ -bidentate ligands. Reaction of the flexible ligand, 1,2-bis(4-pyridyl)ethane ( L 1), with the copper starting material produced two...
Saved in:
| Published in: | Solid state sciences 2005-09, Vol.7 (9), p.1083-1095 |
|---|---|
| Main Authors: | , , , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Online Access: | Get full text |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Four new one-dimensional coordination polymers containing the dimetal cluster Cu
2(OAc)
4 have been synthesized by reacting Cu(OAc)
2
⋅
H
2O with two different
N
,
N
′
-bidentate ligands. Reaction of the flexible ligand, 1,2-bis(4-pyridyl)ethane (
L
1), with the copper starting material produced two, co-crystallizing coordination polymers:
catena-Poly[Cu
2(OAc)
4(
L
1)]
⋅
2H
2O (
1) and
catena-Poly[Cu
2(OAc)
4(
L
1)]. In the solid state,
1 (monoclinic, C2/c,
a
=
24.9471
(
17
)
Å
,
b
=
13.3539
(
9
)
Å
,
c
=
8.8050
(
6
)
Å
,
β
=
93.6480
(
10
)
°
,
V
=
2927.4
(
3
)
Å
3
,
Z
=
4
) features linear chains which are organized into layers. These layers stack along the crystallographic
c-axis forming small hexagonal channels occupied by the solvent of crystallization. Compound
2 (triclinic, P-1,
a
=
7.6263
(
6
)
Å
,
b
=
8.5283
(
6
)
Å
,
c
=
9.8633
(
6
)
Å
,
α
=
74.1070
(
10
)
°
,
β
=
68.2160
(
10
)
°
,
γ
=
74.0090
(
10
)
°
,
V
=
561.96
(
7
)
Å
3
,
Z
=
1
) also features linear chains of the coordination polymer, but differs from
1 in that the chains are packed so as to leave no significant channels. Reaction of the rigid ligand, 1,4-bis(4-pyridyl)buta-1,3-diyne (
L
2), with the copper starting material also afforded two co-crystallizing coordination polymers:
catena-Poly[Cu
2(OAc)
4(
L
2)] (
3) and
catena-Poly[Cu
2(OAc)
4(
L
2)]
⋅
solvents (
4).
3 (monoclinic, P2
1/m,
a
=
9.8065
(
9
)
Å
,
b
=
12.3793
(
11
)
Å
,
c
=
9.9408
(
9
)
Å
,
β
=
107.6009
(
17
)
°
,
V
=
1150.29
(
18
)
Å
3
,
Z
=
2
), like
2, features linear chains and contains no significant solvent accessible void space.
4 (monoclinic, C2/c,
a
=
28.9810
(
16
)
Å
,
b
=
12.9301
(
7
)
Å
,
c
=
8.6954
(
5
)
Å
,
β
=
98.8010
(
10
)
°
,
V
=
3220.0
(
3
)
Å
3
,
Z
=
4
) also consists of linear chains of the coordination polymer. However, the overall topology of
4 is identical to that of
1, with the generated hexagonal channels containing crystallographically unidentifiable solvents of crystallization. Compounds
1 and
2 and compounds
3 and
4 are pairs of polymorphic coordination polymers neglecting the solvents of crystallization in
1 and
4. The compounds, which represent four new examples of coordination polymers containing dimetal units, have been characterized by IR, elemental analysis, and thermogravimetric analysis in addition to X-ray crystallography. |
|---|---|
| ISSN: | 1293-2558 1873-3085 |
| DOI: | 10.1016/j.solidstatesciences.2005.03.006 |