Molecular and electronic structures of germylene and stannylene complexes (CO)5MECl2·nTHF (M = Cr, W; E = Ge, Sn; n = 1, 2) as studied by IR and Raman spectroscopy, X-ray analysis, and quantum chemistry

Bis-Sulfonyl O,C,O-Chelated Metallylenes (Ge, Sn) as Adjustable Ligands for Iron and Tungsten Complexes

The synthesis and characterization of an E2 CE2 bis-sulfonyl aryl pincer ligand and its efficiency for the stabilization of compounds containing low-valent Group 14 elements (Ge and Sn) are reported. Complexation reaction of these metallylenes with iron or tungsten complexes resulted in the modulation of the oxygen atoms of the sulfonyl groups implicated in the stabilization of the Group 14 elements, demonstrating the original adjustable character of the bis-sulfonyl O2 S-C-SO2 aryl pincer.

Bis(μ2-2-(dimethylamino)ethoxo-N,O,O)-di(phenolato-O)ditin(II): a high-resolution single-crystal X-ray diffraction and quantum chemical study

Experimental and calculated electron density functions ρ(r) of the title compound in the crystal were obtained. These were compared with ρ(r) for an isolated dimer. Application of the `Atoms in Molecules' theory allowed the visualization of the electron lone pair (Lp) of tin(II) and the calculation of some bond energies and all atomic charges. The stereochemical activity of the Lp was demonstrated and its volume was estimated to be approximately 10 Å3. The energies of N→Sn and Sn—O bonds were found to be 13–18 and 25–52 kJ mol−1. According to the experimental, AM05-PW and PBE0/6-311G(d,p) calculation data, µ2-2-(dimethylamino)ethoxoate accepts 0.68, 0.45 and 0.40 e from the Sn atom. Using the example of µ2-2-(dimethylamino)ethoxoates and complexes of bis(n-butyl)tin(IV) it was demonstrated that the more screened the Sn atom, the better the catalytic activity of its complex in polyurethane synthesis.