Synthesis, Crystal Structures, and Optical and Magnetic Properties of Samarium, Terbium, and Erbium Coordination Entities Containing Mono-Substituted Imine Silsesquioxane Ligands.

Mono-substituted cage-like silsesquioxanes of the T-type can play the role of potential ligands in the coordination chemistry. In this paper, we report on imine derivatives as ligands for samarium, terbium, and erbium cations and discuss their efficient synthesis, crystal structures, and magnetic and optical properties. X-ray analysis of the lanthanide coordination entities [MCl(POSS)]·2THF [M = Er (), Tb (), Sm ()] showed that all three compounds crystallize in the same space group with similar lattice parameters.

Synthesis, Crystal Structures, and Spectroscopic Properties of Novel Gadolinium and Erbium Triphenylsiloxide Coordination Entities.

In alkali metal and lanthanide coordination chemistry, triphenylsiloxides seem to be unduly underappreciated ligands. This is as surprising as that such substituents play a crucial role, among others, in stabilizing rare oxidation states of lanthanide ions, taking a part of intramolecular and molecular interactions stabilizing metal-oxygen cores and many others. This paper reports the synthesis and characterization of new lithium [Li(OSiPh)(THF)] (), and sodium [Na(OSiPh)] () species, which were later used in obtaining novel gadolinium [Gd(OSiPh)(THF)]·THF (), and erbium [Er(OSiPh)(THF)]·THF () configuration, it can result in res were determined for all - compounds, and in addition, IR, Raman, absorption spectroscopy studies were conducted for and lanthanide compounds.

Polyoxometalate-like structure of new potassium triphenylsiloxides: [K(OSiPh)(CHOH)(HO)]·2CHCH and [K(OSiPh)(HO)].

The synthesis and structural characterization of two new potassium triphenylsiloxides, namely, aqua(propan-2-ol)hexakis(triphenylsilanolato)hexapotassium toluene disolvate, [K(CHOSi)(CHO)(HO)]·2CH, and diaquahexakis(triphenylsilanolato)hexapotassium, [K(CHOSi)(HO)], are reported. Both compounds crystallize in the triclinic space group P-1. The structure in each case resembles an alkali metal polyoxometalate-like structure, in which electrostatic interactions are observed in the metal-oxygen core.