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RESEARCH PRODUCT
Synthesis, spectroscopic studies (Mössbauer and infrared), and the crystal and molecular structure of the organotin(IV)-pyrazine adducts [Sn(CH3)2Cl2]2pyz and [Sn(CH3)2Br2pyz]
Mercedes CamalliFrancesco CarusoEleonora Rivarolasubject
PyrazineChemistryStereochemistryLigandCrystal structureInorganic ChemistryBond lengthCrystallographychemistry.chemical_compoundTrigonal bipyramidal molecular geometryMolecular geometryX-ray crystallographyMaterials ChemistryMoleculePhysical and Theoretical Chemistrydescription
Two adducts [Sn(CH 3 ) 2 Cl 2 ] 2 pyz ( Ia ) and Sn- (CH 3 ) 2 Br 2 pyz] ( Ib ) (pyz = pyrazine) have been synthesized and characterized in the solid state. Infrared and Mossbauer spectroscopies suggest a five- coordinated species for the Ia complex with an angular CSnC bond and a six-coordinated compound with a linear CSnC bond for the Ib complex. X-ray diffraction studies confirm a distorted trigonal bipyramidal geometry with N, Cl axial atoms and Cl and methyls in the equatorial plane for Ia where the Cl ax SnN bond angle is the lowest one reported to date and the Cl eq Sn bond distance the longest one with regard to similar complexes. This molecule has a short contact of 3.47 A between the tin and the axial chlorine atoms. The molecular structure of complex Ib points out all equivalent bonds in the trans position arising from a polymeric chain with bridged pyrazine ligand. The complex Ib is centro- symmetric at the tin atom.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1987-01-01 | Inorganica Chimica Acta |