Stepwise Formation of a 1,3‐Butadiene Analogue of Mixed Heavier Group 15 Elements |
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Authors: | Dr Michael Seidl Dr Gábor Balázs Prof?Dr Alexey Y Timoshkin Prof?Dr Manfred Scheer |
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Affiliation: | 1. Institut für Anorganische Chemie der Universit?t Regensburg, 93040 Regensburg (Germany);2. Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab.199034, St. Petersburg (Russia) |
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Abstract: | The reaction of the phosphinidene complex Cp*P{W(CO)5}2] ( 1 a ) with di‐tert‐butylcarboimidophosphene leads to the P? C cage compound 6 and the Lewis acid–base adduct Cp*P{W(CO)5}2(CNtBu)] ( 2 a ). In contrast, the arsinidene complex shows a different reactivity. At low temperatures, the arsaphosphene complex {W(CO)5}{η2‐(Cp*)As?P(tBu)}{W(CO)5}] ( 3 ) is formed. At these temperatures, 3 reacts further with a second equivalent of carboimidophosphene to form {W(CO)5}{η2‐{(Cp*)(tBu)P}As?P(tBu)}{W(CO)5}] ( 5 ), probably by the insertion of a phosphinidene unit (tBuP) into an As? C bond. In contrast, at room temperature 3 reacts further by a radical‐type reaction to form {(tBu)P?As? As?P(tBu)}{W(CO)5}4] ( 4 ). Compound 4 is the first example of a neutral, 1,3‐butadiene analogue containing only mixed heavier Group 15 elements. It consists of two P?As double bonds connected by arsenic atoms. |
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Keywords: | 1 3‐butadiene analogues arsenic phosphinidene phosphorus tungsten |
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