Preparation and structural characterization of organotin(IV) complexes with ligands containing a hetero {N} atom and a hydroxy group or hydroxy and carboxyl groups
AbstractTwenty-two n-butyltin(IV) and t-butyltin(IV) complexes of ligands containing an –OH (–C@O) group or –OH and –COOHgroups and an aromatic {N} donor atom were prepared by metathetical reactions. On the basis of the FT-IR and Mo¨ssbauer spec-troscopic data, molecular structures were assigned to these compounds. The binding sites of the ligands were identified by means ofFT-IR spectroscopic measurements, and it was found that in most cases the organotin(IV) moiety reacts with the phenolic form ofthese ligands. In the complexes with –OH and –COOH functions, the –COOH group is coordinated to the organotin(IV) centres in amonodentate manner. The 119 Sn Mo¨ssbauer and the FT-IR studies suppor…
The Interplay of Hydrogen Bonding and Multiple Metal Binding – A New Cyclic Polyaminopolyalcohol Ligand as Building Block for the Construction of Microporous, Supramolecular Networks
Cyclohexane-based polyaminopolyalcohols (PAPAs) such as 1,3-diamino-1,2,3-trideoxy-cis-inositol (daci) have been prepared by hydrogenation of suitable aromatic precursors. The pentanuclear complex [Cu5(daci)4(H–2daci)2](SO4)3·18H2O (C3) revealed antiferromagnetic and ferromagnetic interactions between the CuII centers with an S = 3/2 ground state. The microporous structure of C3 exhibited a dehydration/rehydration reaction with an entirely amorphous dehydrated phase at 150 °C and a completely reversible rehydration process at 30 °C. The potential of PAPA ligands for forming polynuclear complexes and supramolecular, hydrogen-bonded networks is discussed.