Structural explanation of the spectral features of the nonsymmetrical complex {2,3,7,8,12,13,17,18-octa­ethyl-5-[(methyl­imino)­meth­yl]porphyrinato-κ⁴N²¹,N²²,N²³,N²⁴}palladium(II)

The features of the electronic absorption spectrum of the nonsymmetrical {2,3,7,8,12,13,17,18-octa­ethyl-5-[(methyl­imino)­meth­yl]porphyrin}palladium(II) complex are explained by the planar structure of the porphyrin core and the π-system of the imino group orthogonal to it.

A three-dimensional Zn^II coordination polymer constructed from 1,1′-bi­phenyl-2,2′,4,4′-tetra­carboxyl­ate and 1,4-bis­(1H-imidazol-1-yl)benzene ligands exhibiting photoluminescence

In a three-dimensional framework containing [Zn₂(CO₂)]_n chains in which carboxyl­ate groups bridge tetra­hedral Zn^II cations in a syn–anti mode, the chains are crosslinked by 1,1′-biphenyl-2,2′,4,4′-tetra­carboxyl­ate and 1,4-bis­(1H-imidazol-1-yl)benzene ligands.

Two new isomeric zinc(II) metal–organic frameworks based on 1,5-bis­(2-methyl-1H-imidazol-1-yl)pentane and 5-methylisophthalate ligands

Two- and three-dimensional zinc metal–organic frameworks (MOFs) constructed from 1,5-bis­(2-methyl-1H-imidazol-1-yl)pentane and 5-methyl­isophthalic acid are reported. Both complexes show high stability and good fluorescence in the solid state at room temperature.

Planarity of benzoyl­thio­carbazate tuberculostatics. III. Diesters of 3-(2-hy­droxy­benzo­yl)di­thio­carbazic acid

Searches for new tuberculostatic agents are important considering the occurrence of drug-resistant strains of Mycobacterium tuberculosis. The structures of three new potentially tuberculostatic compounds were determined by X-ray diffraction. The mutual orientation of the three main fragments of the compounds, namely an aromatic ring, a di­thio­ester group and a hydrazide group, can influence the biological activity of the compounds.

A new one-dimensional Cu^II complex with a three-dimensional supra­molecular architecture incorporating benzene-1,3-di­carboxyl­ate and 1-[(1H-benzotriazol-1-yl)meth­yl]-1H-imidazole

A new Cu^II complex based on the ligands benzene-1,3-di­carboxyl­ate and 1-[(1H-benzotriazol-1-yl)meth­yl]-1H-imidazole (bmi) has been prepared and structurally characterized. The Cu^II ions are linked by bridging benzene-1,3-di­carboxyl­ates to generate a one-dimensional chain and the bmi ligands extend from opposite sides of the main chain.

Hydrogen-bonded assemblies in the mol­ecular crystals of 2,2′-thiodi­acetic acid with ethyl­ene­diamine and o-phenyl­ene­diamine

2,2′-Thiodi­acetic acid (Tda) deprotonates ethyl­enedi­amine and o-phenyl­enedi­amine to form anions with different valencies and different supra­molecular networks. In the former, divalent Tda²⁻ anions form one-dimensional linear supra­molecular chains and these are extended into a three-dimensional sandwich-type supra­molecular network by inter­action with ethyl­enediaminium cations. However, in the latter, monovalent Tda⁻ anions form one-dimensional zigzag supra­molecular chains, which are extended into a three-dimensional supra­molecular network by inter­action with 2-amino­anilinium cations.

Cobalt(II) chloride adducts with aceto­nitrile, propan-2-ol and tetra­hydro­furan: considerations on nuclearity, reactivity and synthetic applications

Three new cobalt(II) chloride adducts with labile ligands have been synthesized from anhydrous CoCl₂. The reactions appear to be sufficiently general to be exploited in a variety of syntheses, including those of magnetically inter­esting single-mol­ecule magnet (SMM) and single-ion magnet (SIM) systems.

Three closely related 1-(naphthalen-2-yl)prop-2-en-1-ones: pseudosymmetry, disorder and supra­moleular assembly mediated by C—H⋯π and C—Br⋯π inter­actions

Three chalcones containing 2-naphthyl substituents exhibit different crystallization characteristics, with pseudosymmetry in one and conformational disorder in another, although the mol­ecules in all three compounds have very similar conformations. The supra­molecular assembly includes a hydrogen-bonded dimer, a hydrogen-bonded octa­mer and a mol­ecular ladder built from C—H⋯π and C—Br⋯π inter­actions.

Synthesis and structure determination of Ce₆Cd₂₃Te: a new chalcogen-containing member of the RE₆Cd₂₃T family (RE is a rare-earth metal and T is a late group 14, 15 and 16 element)

Ce₆Cd₂₃Te is a new inter­metallic phase belonging to the extended RE₆Cd₂₃T family, up until now known to encompass RE = La–Nd, Sm, and Gd, and T = Sn, Pb, Sb, and Bi. It is the first known compound in the Ce–Cd–Te ternary phase diagram.