Do planar tetracoordinate tin complexes really exist?†
Abstract
New experimental and theoretical data show that the previously reported planar tetracoordinate Sn complexes [Sn(Ph2P(Se)N(Se)PPh2)2] (1-sq) and [Sn(iPr2P(Se)N(Se)PiPr2)2] (2-sq) were not isolated and rather confused with the selenium complexes [Se(Ph2P(Se)N(Se)PPh2)2] (3-sq) and [Se(iPr2P(Se)N(Se)PiPr2)2] (4-sq), respectively.