The new pyrrolyl-linked pincer-type ligand, [C(4)H(2)NH(2-CH(2)NH(t)Bu)(5-CH(2)NMe(2))] (1), that has been employed conveniently in high yield by treatment of (2-t-butylaminomethyl)pyrrole with 1 equiv of formaldehyde and dimethylamine hydrochloride each in diethylether and its corresponding aluminum derivative, [C(4)H(2)N(2-CH(2)NH(t)Bu)(5-CH(2)NMe(2))]AlH(2) (2), that has been generated from Me(3)N.AlH(3) using diethylether as a solvent are described. Furthermore, reactions of 2 with 2 equiv of either 1,3-diphenylpropane-1,3-dione in diethylether or phenyl thioisocyanate in dichloromethane interestingly formed [C(4)H(2)N(2-CH(2)NH(t)Bu)(5-CH(2)NMe(2))]Al(PhCOCHCOPh)(2) (3) and [C(4)H(2)N(2-CH(2)NH(t)Bu)(5-CH(2)NMe(2))]Al(SCHNPh)(2) (4), respectively, following deprotonation or hydroalumination reaction kinetics under a dry nitrogen environment. All of the compounds have been subjected to the X-ray diffraction technique in the solid state as well as characterized by NMR spectra.

The structure of the title complex, [ZnCl2(C12H18N2O2)], contains a zwitterionic Schiff base ligand. The complex adopts a distorted tetra­hedral coordination geometry around the metal centre with the Schiff base ligand coordinated in a bidentate fashion via the imine N and phenolate O atoms. In the crystal, inter­molecular N—H⋯O and C—H⋯Cl hydrogen bonds link the mol­ecules into chains parallel to the c-glide planes.

A singly phenoxido-bridged dinuclear Cu II complex, [Cu 2 (L) 2 (SCN) 2 (H 2 O)], has been obtained from a Schiff-base ligand (2-[{[2-(dimethylamino)ethyl]imino}methyl]-6-methoxyphenol), generated by condensation of o-vanillin with N,Ndimethylethane-1,2-diamine. The Cu(II) complex has been fully characterised by analytical, spectroscopic, magnetic susceptibility and EPR measurements and DFT calculations, as well as single-crystal X-ray diffraction analysis. It consists of two geometrically distinct square-pyramidal and octahedral copper(II) centres, exhibiting N 2 O 3 and N 4 O 2 donor sets. In the dimeric unit, the copper atoms are connected by a μ 2 -phenolato oxygen atom, belonging to one bridging Schiff-base ligand. Variable-temperature magnetic susceptibility measurements indicate strong antiferromagnetic exchange interactions between the Cu(II) centres, with a 2J value of -89(1) cm -1 .

In the title complex, [Co(NCS)2(C13H11N3O)2], the CoII centre adopts a distorted octa­hedral coordination geometry with two cis-bidentate Schiff base ligands and two cis thio­cyanate ligands. The Schiff base ligand coordinates via the imine N and pyridine N atoms. The CoII atom lies on a crystallographic twofold rotational axis. Non-classical inter­molecular C—H⋯O hydrogen bonds link the complex mol­ecules into chains along [001].