Title of article :
Tin(IV) derivatives of 2,6-pyridinedicarboxylate: A 119Sn Mِssbauer spectroscopic investigation
Author/Authors :
Costa، نويسنده , , Luiz C.M. and Maia، نويسنده , , José Roberto da S. and de Lima، نويسنده , , Geraldo M. and Ardisson، نويسنده , , José D.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Abstract :
A series of organotin(IV) derivatives of 2,6-pyridinedicarboxylate has been investigated by Mِssbauer spectroscopy in order to elucidate aspects concerning bonding and structural features in the solid state. A geometrical pattern of five-fold coordination at the metal centre has been revealed for SnCl3Bu and SnClBu3 derivatives. Trans stereochemistry for the butyl and vinyl groups of SnCl2Bu2 and SnCl2(Vin)2 derivatives has also been identified by this method. The isomer shift for the divinyl derivative is concurrent to a 7-coordinate metal centre contrasting to that for the dibutyl one. Although there is a discrepancy in isomer shift between these compounds, both have seven-fold coordination at the Sn(IV) nucleus. The resulting data has given evidence that 2,6-pyridinedicarboxylate is acting as a tridentate ligand through pyridil and carbolxylate moiety to all derivatives except for SnClBu3. For the latter, the coordination mode occurs via carboxylate groups. The overall data support distorted geometrical pattern to all complexes in solid state.
Keywords :
C. Spectroscopy , D. Crystal and ligand fields , A. Organotin , B. Chemical synthesis
Journal title :
Solid State Communications
Journal title :
Solid State Communications