The Action of Cyanide on Selenopentathionate and Telluropentathionate.

Organophosphorus–Tellurium Chemistry: From Fundamentals to Applications

“…The potassium salt 38a was isolated as "colorless, hygroscopic needles, rapidly darkening in moist air"; no characterization details were given. 9 Thirty years later Clive and Menchen prepared the Li (38b) and Na (38c) salts and showed that these phosphorus-tellurium compounds are effective reagents for the deoxygenation of epoxides (eq 13). 141,142 The reagent 38c may also be used for the the dehalogenation of α-halo ketones.…”

“…The first organophosphorus−tellurium derivative was described in 1950 by Foss, who observed that the treatment of potassium diethylphosphite with finely divided tellurium in warm ethanol produced the corresponding tellurophosphate K[(EtO) 2 P(Te)-O] as colorless, hygroscopic crystals that darkened rapidly in moist air. 9 This area of phosphorus−chalcogen chemistry was stimulated by the discovery of the first tertiary phosphine telluride n Bu 3 PTe in the early 1960s by Zingaro (section 6.1). 10,11 Over the past 50 years, this class of organophosphorus-(V)−tellurium compound has attracted increasing attention, most notably as a source of reactive Te 0 in the generation of semiconducting metal tellurides in the form of nanomaterials or quantum dots for applications as optoelectronic or thermo- electric materials and as infrared detectors or biomarkers (section 6.7).…”

“…9 This area of phosphoruschalcogen chemistry was stimulated by the discovery of the first tertiary phosphine telluride n Bu 3 PTe in the early 1960s by Zingaro (Section 6.1). 10,11 Over the past 50 years this class of organophosphorus(V)-tellurium compound has attracted increasing attention, most notably as a source of reactive Te 0 in the generation of semiconducting metal tellurides in the form of nanomaterials or quantum dots for applications as optoelectronic or thermoelectric materials and as infrared detectors or biomarkers (Section 6.7).…”

“…TellurophosphatesPotassium O,O′-diethyl tellurophosphate M[(EtO) 2 P(Te)O] (38a, M = K) was obtained as colorless, hygroscopic needles in 1950 by Foss via treatment of potassium diethylphosphite with tellurium in ethanol. The potassium salt 38a was isolated as "colorless, hygroscopic needles, rapidly darkening in moist air"; no characterization details were given 9. Thirty years later, Clive and Menchen prepared the Li (38b) and Na (38c) salts and showed that these phosphorus−tellurium compounds are i v i d u a l n o t d i r e c t l y a s s o c i a t e d w i t h s c i t e i s p r o h i b i t e d .…”

Organic derivatives of monocoordinated tellurium

“…The first compound with the P ± Te bond was synthesised by Foss about 50 years ago. 68 The reaction of elemental Te with an ethanolic solution of potassium diethyl phosphite has resulted in the synthesis of (EtO) 2 P(O)TeK. Later, the corresponding sodium derivative was used as an efficient dehalogenating reagent for a-chloro-and a-bromoketones, 69 and also for deoxygenation of epoxides.…”