Potassium 5-phenyl- and 5-methyltetrazolate react with chlorophosphines to give selectively the corresponding 2-phosphinotetrazoles 1. Oxidation by sulfur and selenium leads to 2-thioand 2-selenophosphinoyltetrazoles (6 , 7) which on heating loose nitrogen and yield the dimers 8 , 9 of thia- and selenadiazaphospholes. N-Phosphinoylnitrilimines are assumed to be formed as intermediates. The small 1JSeP coupling constants indicate that the selenium atoms occupy axial positions in the tbp coordination of phosphorus in 9.
Zeitschrift für Naturforschung B is an international scientific journal which publishes original papers, microreviews, and letters from all areas of inorganic chemistry, solid state chemistry, coordination chemistry, molecular chemistry, and organic chemistry.