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The new phosphinocyclotriphosphane (t-BuP) 2 P-P(SnMe 3 ) 2  (1) has been obtained by reaction of di-tert-butylchlorocyclotriphosphane with tris(trimethylstannyl)phosphane, and has been isolated in pure form. The yellow solid is stable below 0 °C under inert conditions. Compound 1 is a dynamic molecule, as the P atom of the [bis(trimethylstannyl)phosphino] group has a very low barrier to inversion due to the bulky and electropositive Me 3 Sn substituents.

zeitschrift für naturforschung b

Beiträge zur Chemie des Phosphors, 238 [1]. Synthese und Eigenschaften des Phosphinocyclotriphosphans (t-BuP) 2 P–P(SnMe 3 ) 2  / Contributions to the Chemistry of Phosphorus, 238 [1]. Synthesis and Properties of the Phosphinocyclotriphosphane (t-BuP) 2 P–P(SnMe 3 ) 2