Assembly of Chiral Two- and Three-dimensional Copper(I) Pseudohalide Based Coordination Polymers with Asymmetrically Substituted Pyrazine and Pyrimidine Ligands
✍ Scribed by O. Teichert; W. S. Sheldrick
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- German
- Weight
- 192 KB
- Volume
- 625
- Category
- Article
- ISSN
- 0372-7874
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✦ Synopsis
The coordination polymers 2 [(CuCN) 2 (l-2 Mepyz)], 3 [CuCN(l-2 Mepyz)] and 3 [CuCN(l-4 Mepym)] (1±3) (2 Mepyz = 2-methylpyrazine;
4 Mepym = 4-methylpyrimidine) may be prepared by self-assembly in acetonitrile solution at 100 °C (1, 3) or without solvent at 20 °C (2). All three contain 1 [CuCN] chains that are bridged by the bidentate aromatic ligands into sheets in 1 and 3 D frameworks in 2 and 3. Reaction of CuSCN with these heterocyclic diazines at 100 °C leads to formation of the lamellar coordination polymers 2 [(CuSCN)(l-2 Mepyz)] ( ) and 2 [CuSCN (4 Mepym-jN1)] ( ), which contain respectively 1 [CuSCN] chains and trans-trans fused 2 [CuSCN] sheets as substructures. The presence of an asymmetric substitution pattern in 2 Mepyz and 4 Mepym induces the adoption of a chiral structure by 2 and 5 (space groups P2 1 2 1 2 1 and P1).