Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen Heterocyclen

Transition-Metal-Substituted Acyl Phosphanes and Phosphaalkenes. 33.1 Transition-Metal-Substituted Arsaalkenes. 3.2 Reactivity of Metallodisilylphosphanes and -arsanes (η5-C5Me5)(CO)2M−E(SiMe3)2 (M = Fe, Ru; E = P, As) toward Carbon Disulfide. Formation of Metallophosphaalkenes, Metalloarsaalkenes, and 1,3,4-Thiadiphospholes

“…The replacement of two CH units in thiophene A by phosphorus atoms formally leads to four isomeric thiadiphospholes ( B − E ). Only representatives of the types D and E are known, namely the poorly characterized 4,5-bis(trifluoromethyl)-1,2,3-thiadiphosphole (type E ) and four 1,2,4-thiadiphospholes of the type D (R 1 = Me 3 SiS, R 2 = Me 3 Si; R 1 = R 2 = Me 3 SiO; R 1 = R 2 = Ph; R 1 = R 2 = t Bu , ). Compound 8a is the first example of a 1,3,4-thiadiphosphole (type C ).…”

Syntheses and Theoretical and Mechanistic Aspects of 1-Thia-2,4- and 1-Thia-3,4-diphosphole Formed from CS2 and tBuCP and Crystal and Molecular Structure of the First 1-Thia-3,4-diphosphole Complex: cis-[{PtCl2(PEt3)}2(P2SC2tBu2)]

“…The reactivity of the P⋮C triple bond in cycloaddition reactions is well documented, and its similarity to the C⋮C bond is remarkable . Phosphaalkyne cycloaddition reactions afford a variety of five-membered heterophospholes. , Thiaphospholes and thiadiphospholes, obtained previously by various methods, − have also been considered as possible [3 + 2] cycloaddition products of t BuCP ( 1 ) and a PC(R)S intermediate …”