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.

Applications of N-heterocyclic imines in main group chemistry

A survey of the most recent progress in the applications of N-heterocyclic imines in main group compounds is given.

Synthetic, structural, NMR and catalytic studies of phosphinic amide-phosphoryl chalcogenides (chalcogen = O, S, Se) as mixed-donor bidentate ligands in zinc chemistry

Synthesis and catalytic activity of the title compounds are reported.

Metallomacrocycles as anion receptors: combining hydrogen bonding and ion pair based hosts formed from Ag(I) salts and flexible bis- and tris-pyrimidine ligands

Two self-assembled hosts are formed from Ag(I) salts and bis-pyrimidyl ligands and X-ray characterized. Both are able to incorporate two anions into the structure combining hydrogen bonding and electrostatic interactions.