Deciphering supramolecular isomerization in coordination polymers: connected molecular squares vs fused hexagons

The self-assembly of Mn(II), bis(tridentate) ligands, and bent dicarboxylate linkers under ambient conditions has been exploited to generate a series of 1D coordination polymers in good yields. For a set...

In situ generation of Ph3PO in cyanido-bridged heterometallic {FeIIILnIII}2 molecular squares (Ln = Eu, Sm)

Two new examples of cyanido-bridged {FeIII2(Eu/Sm)III2} molecular squares that exhibit weak antiferromagnetic interactions between 3d and 4f centers are reported.

Molecular squares, coordination polymers and mononuclear complexes supported by 2,4-dipyrazolyl-6H-1,3,5-triazine and 4,6-dipyrazolylpyrimidine ligands

The title compounds include the [BF4⊂{Fe(L)}4(μ-L)4]7+ molecular square shown; [Ag4(μ-L)4]4+ metallacycles with encapsulated ClO4− or SbF6− ions; and families of iron(ii) and silver(i) coordination polymers.

Hydrogen-bonded networks in oxygen-coordinated monoamide complexes of zinc(II)

The preparation of the bulky secondary amide N-(2,6-diisopropylphenyl)-2,2-dimethylpropanamide and the determination of its crystal structure at 173(2) K are reported. The structure displays disorder of the tBu methyl groups due to thermal motion and an infinite N–H····O=C hydrogen-bonded chain described by a [Formula: see text] graph set. Reaction of this amide with ZnCl2 or ZnBr2 in tetrahydrofuran (THF) results in dihalo-(tetrahydrofurano)-(N-(2,6-diisopropylphenyl)–2,2-dimethylpropanamido)-zinc(II) complexes (Cl, Br) for which the crystal structures have also been determined. These complexes, as well as a chloroform solvate of the dichloro-complex, contain N–H····X–Zn hydrogen-bonded chains described by [Formula: see text] graph sets. Evaporative crystallization results in the loss of both chloroform and THF to afford crystals determined to be bis(μ2-chloro)-dichloro-bis(N-(2,6-diisopropylphenyl)-2,2-dimethylpropanamido)-dizinc(II) by single crystal X-ray diffraction. This dimeric complex shows a complex network of N–H····Cl–Zn hydrogen bonds describable by [Formula: see text], [Formula: see text], and [Formula: see text] chains, small [Formula: see text] molecular “squares”, and larger [Formula: see text] rings.