Reaction of cupferron [NH 4 L, L = PhN(O)NO -] with tin(IV), complex 2. The tin centers are heptacoordinated in a pentagonal bipyramidal geometry in the dimeric complex 3. diphenyltin(IV) and dimethyltin(IV) halides yields the cupferronato complexes SnL 4 (1), Ph 2 SnL 2 (2) and These complexes incorporate five-membered SnO 2 N 2 and four-membered Sn 2 O 2 inorganic rings. Vibrational spectral [Me 2 SnL 2 ] 2 (3). All were characterized by FT-IR, FT-Raman, NMR ( 1 H, 13 C and 119 Sn) spectroscopic methods and X-ray data are consistent with the structures determined. The 119 Sn NMR spectra indicate that in solution 1 retains its structural analysis. An almost ideal, very rare dodecahedral geometry is found in the structure of 1. The hexacoordinated octacoordinated nature; in compound 2 the tin atom is hexacoordinated, while in 3 the tin atom is pentacoordinated. tin center exhibits a bicapped tetrahedral geometry in Structures in the Solid State man, multinuclear ( 1 H, 13 C and 119 Sn) NMR as well as Xray diffraction analysis.
Vibrational Behavior
The FT-IR and Raman spectra were recorded for the [a] Institute of Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, complexes 1؊3 in the 3500Ϫ100 cm Ϫ1 spectral range. As