Synthesis and molecular structure of tin(IV) 1‐pyrrolecarbodithioates

The 1‐pyrrolecarbodithioate complexes of tin, PhSnCl(S 2 CNC 4 H 4 ) 2 ( 1 ) and Sn(S 2 CNC 4 H 4 ) 4 ( 2 ) have been synthesized and characterized by IR and NMR spectra ( 1 H, 13 C and 119 Sn). δ 119 Sn suggests hexacoordination for 1 and an even higher coordination number for 2 . X‐ray structure determinations of these as well as of Me 2 Sn(S 2 CNC 4 H 4 ) 2 ( 3 ) have shown that 3 is one of the few known examples with a skew‐trapezoidal bipyramidal configuration. 1 attains approximately a cis ‐octahedral geometry with two bidentate carbodithioate ligands with the Cl atom and the phenyl group in cis position. Complex 2 possesses two bidentate ligands while the other two are essentially anisobidentate leading to a structure between an octahedraon and a dodecahedron.