Structural Variability of Cobalt(II) Coordination Polymers: Three Polymorphs of Co3(TMA)2 [TMA = Trimesate, C6H3(COO)33-]
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- 作者：Deping Cheng ; Masood A. Khan ; and Robert P. Houser
- 刊名：Crystal Growth & Design
- 出版年：2004
- 出版时间：May 2004
- 年：2004
- 卷：4
- 期：3
- 页码：599 - 604
- 全文大小：347K
- 年卷期：v.4,no.3(May 2004)
- ISSN：1528-7505
文摘
The aqueous reaction of cobalt(II) sulfate with trimesic acid (H3TMA = 1,3,5-benzenetricarboxylicacid) in the presence of a base yields complexes with the general formula of Co3(TMA)2. The identity of the basedetermines the specific structural characteristics of the complexes formed. When sodium hydroxide is used, a novelcobalt(II) coordination polymer, {[NaCo3(TMA)2(
3-OH)](2-H2O)4(H2O)7·1.5H2O}n (1), is produced. Compound 1contains NaCo3(OH) clusters connected via TMA ligands into 1D chains, and 1 crystallizes in the orthorhombicspace group Pbca with a = 18.907(2) Å, b = 14.565(3) Å, c = 21.414(4) Å, and Z = 8. When triethylamine is used,the previously reported 1D zigzag chain coordination polymer, [Co3(TMA)2(H2O)12]n (2), is produced. Whentetraethylammonium hydroxide is used, a trinuclear cobalt(II) complex, [Co3(TMA)2(H2O)14]·4H2O (3), is producedthat has a structure identical to a segment of the zigzag chain of 2. Compound 3 crystallizes in the triclinic spacegroup P
with a = 6.6542(5) Å, b = 10.7114(7) Å, c = 12.3567(7) Å, 
pha.gif" BORDER=0> = 99.008(4)
, 
= 102.553(6), 
= 107.344(7),and Z = 1.
3-OH)](2-H2O)4(H2O)7·1.5H2O}n (1), is produced. Compound 1contains NaCo3(OH) clusters connected via TMA ligands into 1D chains, and 1 crystallizes in the orthorhombicspace group Pbca with a = 18.907(2) Å, b = 14.565(3) Å, c = 21.414(4) Å, and Z = 8. When triethylamine is used,the previously reported 1D zigzag chain coordination polymer, [Co3(TMA)2(H2O)12]n (2), is produced. Whentetraethylammonium hydroxide is used, a trinuclear cobalt(II) complex, [Co3(TMA)2(H2O)14]·4H2O (3), is producedthat has a structure identical to a segment of the zigzag chain of 2. Compound 3 crystallizes in the triclinic spacegroup P with a = 6.6542(5) Å, b = 10.7114(7) Å, c = 12.3567(7) Å, pha.gif" BORDER=0> = 99.008(4), = 102.553(6), = 107.344(7),and Z = 1.