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Multitopic 3,2':6',3''-terpyridine ligands as 4-connecting nodes in two-dimensional 4,4-networks. | LitMetric
The tetratopic 1,4-bis(2-phenylethoxy)-2,5-bis(3,2':6',3''-terpyridin-4'-yl)benzene (1) and 1,4-bis(3-phenylpropoxy)-2,5-bis(3,2':6',3''-terpyridin-4'-yl)benzene (2) ligands have been prepared and fully characterised. Combination of ligand 1 or 2 and [M(hfacac)]·HO (M = Cu, = 1; M = Zn, = 2) under conditions of crystal growth by layering led to the formation of [Cu(hfacac)(1)] ·3.6(1,2-ClCH)·2CHCl, [Zn(hfacac)(1)] ·MeCH·1.8CHCl, [Cu(hfacac)(2)] ·MeCH·2HO, [Cu(hfacac)(2)] ·2.8CHCl and [Cu(hfacac)(2)] ·2(1,2-ClCH)·0.4CHCl·0.5HO. For each compound, single-crystal X-ray analysis revealed the assembly of a planar (4,4)-net in which the tetratopic ligands 1 or 2 define the nodes. The metal centres link two different bis(3,2':6',3''-tpy) ligands the outer pyridine rings; whereas copper(ii) has N-donors in a -arrangement, zinc(ii) has them in . This difference between the copper(ii) and zinc(ii) coordination polymers modifies the architecture of the assembly without changing the underlying (4,4)-network.
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