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Assembly of Chiral Two‐ and Three‐dimensional Copper(I) Pseudohalide Based Coordination Polymers with Asymmetrically Substituted Pyrazine and Pyrimidine Ligands
Author(s) -
Teichert O.,
Sheldrick W. S.
Publication year - 1999
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/(sici)1521-3749(199911)625:11<1860::aid-zaac1860>3.0.co;2-k
Subject(s) - pyrazine , pyrimidine , copper , chemistry , coordination polymer , polymer , stereochemistry , crystallography , combinatorial chemistry , polymer chemistry , organic chemistry
The coordination polymers ∞ 2 [(CuCN) 2 (μ‐2 Mepyz)], ∞ 3 [CuCN(μ‐2 Mepyz)] and ∞ 3 [CuCN(μ‐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)(μ‐2 Mepyz)] ( 4 ) and ∞ 2 [CuSCN · (4 Mepym‐κ N1 )] ( 5 ), 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 P 2 1 2 1 2 1 and P 1).