35Cl NQR in SnCl4·2Me2O and SnCl4·2Et2O

Abstract

35Cl NQR spectra in SnCl4·2Me2O and SnCl4·2Et2O have been observed. Three crystal modifications of SnCl4·2Me2O have been found. A cis geometry is suggested for one of them, and a trans geometry for the remainder. A transformation between the cis and trans isomers in the solid state is indicated. The Zeeman effect on single crystals of cis-SnCl4·2Me2O and SnCl4·2Et2O has provided detailed information on bond angles and bond character. It is confirmed that the molecular geometry of cis-SnCl4·2Me2O belongs to the C2 group and that SnCl4·2Et2O has a trans geometry. The η values of the Cl atoms in cis-SnCl4·2Me2O are negligibly small and those of the Cl atoms in SnCl4·2Et2O are 0.11. The relatively small η values for the latter are ascribed to π bonding between the Sn and Cl atoms.

35Cl nuclear quadrupole resonance study of lattice dynamics in SnCl4⋅5H2O comprising uncoordinated water molecules

“…While the precise crystal structures of SnCl 4 •xH 2 O (xϭ2,3,4,5,...) have yet to be determined, the molecular point group symmetries have been revealed by Raman spectroscopy, 1 and the Sn-Cl bond characteristics have been investigated by Negita and co-workers, 2 who observed 35 Cl nuclear quadrupole resonance ͑NQR͒ spectra for xϭ2, 3,4, and 5 at room temperature and at 77 K.…”

“…[3][4][5][6][7] From the zero-splitting patterns of single crystals of SnCl 4 •2Me 2 O and SnCl 4 •2Et 2 O, Mishima and Okuda were able to obtain detailed information on the configuration of the ligands and the bond angles, 3 revealing a cis-geometry for SnCl 4 •2Me 2 O, and a trans-geometry for SnCl 4 •2Et 2 O. On the other hand, no comprehensive study of the bond characteristics and lattice dynamics of tin ͑IV͒ chloride complexes has been made employing NQR techniques.…”

Electronic effects of substitution and reconstruction of the coordination polyhedron in adducts of Main Group IV element halides

“…Note. Diox is dioxane, DEE is diethyl ether, DBS is dibenzyl sulfide, acac is acetylacetonate; | r| is the total effective charge on the chlorine atoms in the adduct.a The results of Zeeman analysis of a single crystal at 235 K 44. …”